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Notice

The 2012 edition of the Uniform Plumbing Code is developed through a consensus standards development processapproved by the American National Standards Institute. This process brings together volunteers representing variedviewpoints and interests to achieve consensus on plumbing issues. While the International Association of Plumbing andMechanical Officials (IAPMO) administers the process and establishes rules to promote fairness in the development ofconsensus, it does not independently test, evaluate, or verify the accuracy of any information or the soundness of anyjudgments contained in its codes and standards.

IAPMO disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whetherspecial, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, or reliance onthis document. IAPMO also makes no guaranty or warranty as to the accuracy or completeness of any information publishedherein.

In issuing and making this document available, IAPMO is not undertaking to render professional or other services for oron behalf of any person or entity. Nor is IAPMO undertaking to perform any duty owed by any person or entity to someoneelse. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice ofa competent professional in determining the exercise of reasonable care in any given circumstances.





2012 UNIFORM PLUMBINGCODE®

An American National StandardIAPMO/ANSI UPC 1-2012

®



Copyright © 2012by

International Association of Plumbing and Mechanical OfficialsAll Rights Reserved

No part of this work may be reproduced or recorded in any form or by any means,except as may be expressly permitted in writing by the publisher.

Twenty-Sixth Edition

First Printing, January 2012Second Printing, August 2012Third Printing, January 2013Fourth Printing, March 2013Fifth Printing, August 2013Sixth Printing, July 2014

Seventh Printing, January 2015Eighth Printing, July 2015

ISSN 0733-2335Published by the International Association of Plumbing and Mechanical Officials

4755 E. Philadelphia Street • Ontario, CA 91761-2816 – USAMain Phone: (909) 472-4100 • Main Fax: (909) 472-4150

REVISION MARKINGS

Solid vertical lines in the margins indicate a technical change from the requirements of the 2009 edition.Where a section, paragraph or table has been revised or relocated within the code, a solid vertical lineappears next to the section number and title.

An arrow in the margin indicates where an entire section, paragraph, or table has been deleted.

A reference in brackets [ ] following a section or paragraph indicates material that has been extracted fromanother document. This reprinted material is not the complete and official position of the source documenton the reference subject which is represented by the standard in its entirety. Text which has been extractedpursuant to IAPMO’s Extract Guidelines is denoted with the use of the source document in the margin. Thistext has not been fully processed by IAPMO in accordance with ANSI’s public announcement consensusrequirements for an American National Standard (ANS) nor approved by ANSI’s Board of StandardsReview, but will be fully processed in accordance with those requirements as part of the next revision cyclefor this document.

Information on referenced publications can be found in Chapter 14.

All pressures used in this code are gauge pressures unless otherwise indicated.

NFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPANFPA



2012 UPC Foreword

The advantages of a uniform plumbing code adopted by various local jurisdictions have long been recognized. Disorder inthe industry as a result of widely divergent plumbing practices and the use of many different, often conflicting, plumbingcodes by local jurisdictions influenced the Western Plumbing Officials Association (now the International Association ofPlumbing and Mechanical Officials [IAPMO]) to form a committee of plumbing inspectors, master and journeymanplumbers, and sanitary and mechanical engineers, assisted by public utility companies and the plumbing industry to create abasic plumbing document for general use. The product of this effort, the first edition of the Uniform Plumbing Code™(UPC™) was officially adopted by IAPMO in 1945. The widespread use of this code over the past five decades byjurisdictions throughout the United States and internationally is testament to its merit.

With the publication of the 2003 Edition of the Uniform Plumbing Code, another significant milestone was reached. For thefirst time in the history of the United States, a plumbing code was developed through a true consensus process. The 2012edition represents the most current approaches in the plumbing field and is the fourth edition developed under the ANSIconsensus process. Contributions to the content of the code were made by every segment of the built industry, includingsuch diverse interests as consumers, enforcing authorities, installers/maintainers, labor, manufacturers, research/standards/testinglaboratories, special experts, and users.

The UPC is designed to provide consumers with safe and sanitary plumbing systems while, at the same time, allowinglatitude for innovation and new technologies. The public at large is encouraged and invited to participate in IAPMO’s openconsensus code development process. This code is updated every three years. A code development timeline and otherrelevant information is available at IAPMO’s website at www.iapmo.org.

The Uniform Plumbing Code is dedicated to all those who, in working to achieve “the ultimate plumbing code,” haveunselfishly devoted their time, effort, and personal funds to create and maintain this, the finest plumbing code in existencetoday.

The 2012 Uniform Plumbing Code is supported by the American Society of Sanitary Engineering (ASSE), the MechanicalContractors Association of America (MCAA), the Plumbing-Heating-Cooling Contractors National Association (PHCC-NA), the United Association (UA), and the World Plumbing Council (WPC). The presence of these logos, while reflectingsupport, does not imply any ownership of the copyright to the UPC, which is held exclusively by IAPMO. Further, the logosof these associations indicates the support of IAPMO’s open, consensus process being used to develop IAPMO’s codes andstandards.

The addresses of the organizations are as follows:ASSE – 901 Canterbury Road, Suite A • Westlake, OH 44145-7201 • (440) 835-3040MCAA – 1385 Piccard Drive • Rockville, MD 20850 • (301) 869-5800PHCC-NA – PO Box 6808 • Falls Church, VA 22046 • (800) 533-7694UA – Three Park Place • Annapolis, MD 21401 • (410) 269-2000WPC – World Plumbing Council Secretariat

P.O. Box 810 • Lafayette, IN 47902, USA

v



vi



COMMITTEE ON UNIFORM PLUMBING CODEThese lists represent the membership at the time the Committee was balloted on the final text of this edition. Since that time, changes in the membership may have occurred.

Rand Ackroyd, Plumbing and Drainage Institute [M]Bob Adler, City of San Jose, California [E]Sarah Aguilar, Southland Industries [I/M]Julius Ballanco, American Society of Plumbing Engineers [SE]Denise Beach, NFPA [R/S/T]Sylvanus Bloice, Roots Plumbing Services [I/M]Jeremy Brown, NSF International [R/S/T]Dan Buuck, National Association of Home Builders [U]Paul Cabot, American Gas Association [U]Maggie Carroll, Underwriters Laboratories [R/S/T]Ian Chang, Intertek Testing Services [R/S/T]Richard Church, Plastic Pipe and Fittings Association [M]Rickey Fabra, Plumbers & Steamfitters [L]Pennie Feehan, Copper Development Association [M]

John Fischer, County of St. Louis [E]James Galvin, Plumbing Manufacturers International [M]Scott Hamilton, United Association [L]William LeVan, Cast Iron Soil Pipe Institute [M]David L. Mann, Plumbers & Steamfitters Local 342 [L]Thomas Pape, Alliance for Water Efficiency (AWE) [C]Arnold Rodio, Jr., Pace Setter Plumbing [I/M]Anthony Scarano, Plastics Piping Consultant [SE]Larry Soskin, Ace Duraflo [I/M]Jim Stack, Plumbing-Heating-Cooling Contractors National

Association [I/M]Amir Tabakh, City of Los Angeles - Department of Water and Power [E]April Trafton, Donald Dickerson Associates [SE]Steven Weinberger,MCAA [I/M]

AlternatesDJ Berger, Plumbers and Steamfitters [L]Lawrence Brown, National Association of Home Builders [U]Mark Casey, City of Los Angeles - Department of Building and Safety [E]Marty Cooper, City of Foster City, California [E]Michael Cudahy, Plastic Pipe and Fittings Association [M]James Dingman, Underwriters Laboratories [R/S/T]

Nasrin Kashefi, NSF International [R/S/T]Jim Kendzel, American Society of Plumbing Engineers [SE]Martin Salberg, United Association Local [L]James Pavesic, United Association [L]Arnold Rodio, Sr., Pace Setter Plumbing [I/M]James Walls, Cast Iron Soil Pipe Institute [M]

Dan Daniels, Ex-Officio, IAPMO [E] Matt Sigler, IAPMO Staff Liaison

Nonvoting

COMMITTEE MEMBERSHIP CLASSIFICATION ABBREVIATIONSThese classifications apply to Technical Committee members and represent their principal interest in the activity of a committee.

M Manufacturer: A representative of a maker or marketer of a product, assembly or system, or portion thereof, that is affected by the standard.U User: A representative of an entity that is subject to the provisions of the standard or that voluntarily uses the standard.I/M Installer/Maintainer: A representative of an entity that is in the business of installing or maintaining a product, assembly or system affected by the

standard.L Labor: A labor representative or employee concerned with safety in the workplace.R/S/T Research/Standards/Testing Laboratory: A representative of an independent research organization; an organization that develops codes, standards or

other similar documents; or an independent testing laboratory.E Enforcing Authority: A representative or an agency or an organization that promulgates and/or enforces standards.C Consumer: A person who is, or represents, the ultimate purchaser of a product, system, or service affected by the standard, but who is not included

in the User classification.SE Special Expert: A person not representing any of the previous classifications, but who has special expertise in the scope of the standard or portion

thereof.

IAPMO Standards Council

Tim Brink, Mechanical Contractors Association of Eastern PA [SE]Bob Courtnier, State of California [U]Rex Crawford, City of Lincoln [E]Ron George, Ron George Design & Consulting Services [SE]

Linden Raimer, Consultant [U]Phil Ribbs, PHR Consultants [SE]Kurt Steenhoek, Local Union 3 [L]Kevin Tindall, Tindall & Ranson Plumbing, Heating & A/C, Inc. [SE]

vii

Terry Swisher, ChairmanState of Oregon, [E]

Tim Collings, ChairmanSalt Lake City, Utah [E]

Gabriella M. Davis, SecretaryInternational Association of Plumbing and Mechanical Officials

Lynne Simnick, Recording SecretaryInternational Association of Plumbing and Mechanical Officials

Nonvoting

IAPMO Uniform Plumbing Code Technical Committee



FORM FOR PROPOSALS ON IAPMO UPC/UMC COMMITTEE DOCUMENTSNOTE: All Proposals MUST be received by 5:00 PM PST on January 3, 2013.

PLEASE USE SEPARATE FORM FOR EACH PROPOSALIAPMO’s green initiative is to lead the organization paper free by providing the Proposed Monographs, Annual Report onProposals and Comments in digital Adobe PDF http://www.iapmo.org/Pages/RequestFormforROPROC.aspx

Note printed copies of Report on Proposals and Report on Comments will not be available at the hearings. All requestedprinted copies will be mailed 30 days prior to the hearing date. Please submit by the following dates listed by the code belowon the request form.

Date Name Tel. No.

Company

Street Address City State Zip.

Please Indicate Organization Represented (if any)

1. IAPMO Document Title IAPMO No. & Year

Section/Paragraph

2. Proposal Recommends (check one): New Text Revised Text Deleted Text

3. Proposal (Include proposed new wording, or identification of wording to be deleted): [Note: Proposed textshould be in legislative format: i.e., use underscore to denote wording to be inserted (inserted wording) andstrike-through to denote wording to be deleted (deleted wording).] Please note if you are referencing a standardor other publication, please provide two copies.

4. Statement of Problem and Substantiation for Proposal: [Note: State the problem that will be resolved byyour recommendations: give the specific reason for your proposal including copies of tests, research papers,etc. If more then 200 words, it may be abstracted for publication.]

5. This Proposal is original material. [Note: Original material is considered to be the submitter’s own ideabased on or as a result of his/her own experience, thought or research and, to the best of his/her knowledge, isnot copied from another source.)

This Proposal is not original material; its source (if known) is as follows:

I hereby grant the IAPMO all and full rights in copyright, in this proposal, and I understand that I acquire no rights in any publicationof IAPMO in which this proposal in this or another similar or analogous form is used.

Signature (Required):

PLEASE USE SEPARATE FORM FOR EACH PROPOSAL • IAPMO FAX • (909) 472-4198 or (877) 852-6337Mail to: Code Development • IAPMO • 4755 E Philadelphia St • Ontario • CA • 91761-2816

Email to: [email protected]

For further information on the standards-making process, please contact theCodes and Standards Administration at 909-472-4110.

For technical assistance, please call IAPMO at 909-472-4111 or 909-230-5535.

FOR OFFICE USE ONLYLOG # :DATE REC’D:

viii



INSTRUCTIONS FOR SUBMITTING PROPOSALS– PLEASE READ CAREFULLY –

1. Type or print in BLACK ink.

2. Indicate the title of the document and the document year. Also, indicate the specific section orparagraph that the proposed amendment applies to.

3. Check the appropriate box to indicate whether this proposal recommends adding new text,revising existing text, or deleting text.

4. In the space identified as “Proposal,” indicate the exact wording you propose as new or revisedtext, or the text you propose be deleted.

5. In the space titled, “Statement of Problem and Substantiation for Proposal,” state the problemthat will be resolved by your recommendation and give the specific reason for your proposal.Include copies of test results, research papers, fire experience, or other materials thatsubstantiate your recommendation. (See note below, item (f).)

6. Check the appropriate box to indicate whether or not this proposal is original material, and if it isnot, indicate the source of the material.

7. Sign the proposal.

If supplementary material (photographs, diagrams, reports, etc.) is included, you may be required tosubmit sufficient copies for all members and alternates of the technical committee. For publication inthe Report on Proposals, the technical committee is authorized to abstract the “Statement of Problemand Substantiation for Proposal” if it exceeds 200 words.

NOTE: The IAPMO Regulations Governing Committee Projects in Paragraph 4-3.3 state: Eachproposal shall be submitted to the council secretary and shall include: (a) identification of the submitterand his or her affiliation (i.e., technical committee, organization, company), where appropriate; (b)identification of the document, edition of the document, and paragraph of the document to which theproposal is directed; (c) the proposed text of the proposal, including the wording to be added, revised(and how revised), or deleted; (d) a statement of the problem and substantiation for proposal; (e) thesignature of the submitter; and (f) two copies of any document(s) (other than an IAPMO document)being proposed as a reference standard or publication (see 3-3.7).

ix



x



xiUNIFORM PLUMBING CODE

CHAPTER 1 ADMINISTRATION . . . . . . . . . . . . . .1101.0 General . . . . . . . . . . . . . . . . . . . . . . .1101.1 Title . . . . . . . . . . . . . . . . . . . . . . . . . .1101.2 Scope . . . . . . . . . . . . . . . . . . . . . . . .1101.3 Purpose . . . . . . . . . . . . . . . . . . . . . .1101.4 Conflicts Between Codes . . . . . . . . .1101.5 Plans Required . . . . . . . . . . . . . . . . .1101.6 Repairs and Alterations . . . . . . . . . .1101.7 Maintenance . . . . . . . . . . . . . . . . . . .1101.8 Existing Construction . . . . . . . . . . . .1101.9 Additions, Alterations, or

Repairs . . . . . . . . . . . . . . . . . . . . . . .1101.10 Appendices . . . . . . . . . . . . . . . . . . . .1101.11 Application to Existing

Plumbing System . . . . . . . . . . . . . . .1102.0 Organization and Enforcement . . . . .2102.1 Authority Having Jurisdiction . . . . . .2102.2 Duties and Powers of the

Authority Having Jurisdiction . . . . . .2102.3 Board of Appeals . . . . . . . . . . . . . . .3102.4 Violations . . . . . . . . . . . . . . . . . . . . .3102.5 Penalties . . . . . . . . . . . . . . . . . . . . . .3103.0 Permits and Inspections . . . . . . . . . .3103.1 Permits Required . . . . . . . . . . . . . . .3103.2 Application for Permit . . . . . . . . . . . .3103.3 Permit Issuance . . . . . . . . . . . . . . . .3103.4 Fees . . . . . . . . . . . . . . . . . . . . . . . . .4103.5 Inspections . . . . . . . . . . . . . . . . . . . .5103.6 Connection Approval . . . . . . . . . . . .6103.7 Unconstitutional . . . . . . . . . . . . . . . .6103.8 Validity . . . . . . . . . . . . . . . . . . . . . . .6Table 103.4 Plumbing Permit Fees . . . . . . . . . . .7

CHAPTER 2 DEFINITIONS . . . . . . . . . . . . . . . . . .9201.0 General . . . . . . . . . . . . . . . . . . . . . . .9201.1 Applicability . . . . . . . . . . . . . . . . . . . .9202.0 Definition of Terms . . . . . . . . . . . . . .9202.1 General . . . . . . . . . . . . . . . . . . . . . . .9

CHAPTER 3 GENERAL REGULATIONS . . . . . .19301.0 Materials – Standards and

Alternates . . . . . . . . . . . . . . . . . . . .19301.1 Minimum Standards . . . . . . . . . . . .19301.2 Alternate Materials and Methods

of Construction Equivalency . . . . . .19301.3 Flood Hazard Areas . . . . . . . . . . . .19

301.4 Alternative Engineered Design . . . .20302.0 Iron Pipe Size (IPS) Pipe . . . . . . . .20302.1 General . . . . . . . . . . . . . . . . . . . . . .20303.0 Disposal of Liquid Waste . . . . . . . .20303.1 General . . . . . . . . . . . . . . . . . . . . . .20304.0 Connections to Plumbing

System Required . . . . . . . . . . . . . .20304.1 General . . . . . . . . . . . . . . . . . . . . . .20305.0 Damage to Drainage System

or Public Sewer . . . . . . . . . . . . . . .20305.1 Unlawful Practices . . . . . . . . . . . . .20306.0 Industrial Wastes . . . . . . . . . . . . . .20306.1 Detrimental Wastes . . . . . . . . . . . .20306.2 Safe Discharge . . . . . . . . . . . . . . . .20307.0 Location . . . . . . . . . . . . . . . . . . . . .20307.1 System . . . . . . . . . . . . . . . . . . . . . .20307.2 Ownership . . . . . . . . . . . . . . . . . . .20308.0 Improper Location . . . . . . . . . . . . . .20308.1 General . . . . . . . . . . . . . . . . . . . . . .20309.0 Workmanship . . . . . . . . . . . . . . . . .21309.1 Engineering Practices . . . . . . . . . . .21309.2 Concealing Imperfections . . . . . . . .21309.3 Burred Ends . . . . . . . . . . . . . . . . . .21309.4 Installation Practices . . . . . . . . . . . .21310.0 Prohibited Fittings and

Practices . . . . . . . . . . . . . . . . . . . . .21310.1 Fittings . . . . . . . . . . . . . . . . . . . . . .21310.2 Drainage and Vent Piping . . . . . . . .21310.3 Waste Connection . . . . . . . . . . . . .21310.4 Use of Vent and Waste Pipes . . . . .21310.5 Obstruction of Flow . . . . . . . . . . . .21310.6 Dissimilar Metals . . . . . . . . . . . . . .21310.7 Direction of Flow . . . . . . . . . . . . . . .21310.8 Screwed Fittings . . . . . . . . . . . . . . .21311.0 Independent Systems . . . . . . . . . . .21311.1 General . . . . . . . . . . . . . . . . . . . . . .21312.0 Protection of Piping, Materials,

and Structures . . . . . . . . . . . . . . . .21312.1 General . . . . . . . . . . . . . . . . . . . . . .21312.2 Installation . . . . . . . . . . . . . . . . . . .21312.3 Building Sewer and Drainage

Piping . . . . . . . . . . . . . . . . . . . . . . .21312.4 Corrosion, Erosion, and

Mechanical Damage . . . . . . . . . . . .21312.5 Protectively Coated Pipe . . . . . . . .21

TABLE OF CONTENTS



312.6 Freezing Protection . . . . . . . . . . . .21312.7 Fire-Resistant Construction . . . . . .21312.8 Waterproofing of Openings . . . . . . .22312.9 Steel Nail Plates . . . . . . . . . . . . . . .22312.10 Sleeves . . . . . . . . . . . . . . . . . . . . . .22312.11 Structural Members . . . . . . . . . . . .22312.12 Rodentproofing . . . . . . . . . . . . . . . .22313.0 Hangers and Supports . . . . . . . . . .22313.1 Suspended Piping . . . . . . . . . . . . .22313.2 Piping Support . . . . . . . . . . . . . . . .22313.3 Underground Piping . . . . . . . . . . . .22313.4 Strength . . . . . . . . . . . . . . . . . . . . .22313.5 Piping, Fixtures, Appliances,

and Appurtenances . . . . . . . . . . . . .22313.6 Hanger Rod Sizes . . . . . . . . . . . . .22Table 313.6 Hanger Rod Sizes . . . . . . . . . . . . .22313.7 Gas Piping . . . . . . . . . . . . . . . . . . .22314.0 Trenching, Excavation, and

Backfill . . . . . . . . . . . . . . . . . . . . . .22314.1 Trenches . . . . . . . . . . . . . . . . . . . . .22314.2 Tunneling and Driving . . . . . . . . . . .22314.3 Open Trenches . . . . . . . . . . . . . . . .22314.4 Excavations . . . . . . . . . . . . . . . . . .22315.0 Joints and Connections . . . . . . . . .23315.1 Unions . . . . . . . . . . . . . . . . . . . . . .23315.2 Prohibited Joints and

Connections . . . . . . . . . . . . . . . . . .23316.0 Increasers and Reducers . . . . . . . .23316.1 General . . . . . . . . . . . . . . . . . . . . . .23317.0 Food-Handling Establishments . . . .23317.1 General . . . . . . . . . . . . . . . . . . . . . .23318.0 Test Gauges . . . . . . . . . . . . . . . . . .23318.1 General . . . . . . . . . . . . . . . . . . . . . .23318.2 Pressure Tests (10 psi or less) . . . .23318.3 Pressure Tests (greater than

10 psi to 100 psi) . . . . . . . . . . . . . .23318.4 Pressure Tests (exceeding

100 psi) . . . . . . . . . . . . . . . . . . . . . .23318.5 Pressure Range . . . . . . . . . . . . . . .23319.0 Medical Gas and Vacuum

Systems . . . . . . . . . . . . . . . . . . . . .23319.1 General . . . . . . . . . . . . . . . . . . . . . .23Table 313.1 Hangers and Supports . . . . . . . . . .24

CHAPTER 4 PLUMBING FIXTURESAND FIXTURE FITTINGS . . . . . . .25

401.0 Materials – GeneralRequirements . . . . . . . . . . . . . . . . .25

401.1 Quality of Fixtures . . . . . . . . . . . . .25

401.2 Lead . . . . . . . . . . . . . . . . . . . . . . . .25402.0 Installation . . . . . . . . . . . . . . . . . . .25402.1 Cleaning . . . . . . . . . . . . . . . . . . . . .25402.2 Joints . . . . . . . . . . . . . . . . . . . . . . .25402.3 Securing Fixtures . . . . . . . . . . . . . .25402.4 Wall-Hung Fixtures . . . . . . . . . . . . .25402.5 Setting . . . . . . . . . . . . . . . . . . . . . .25402.6 Flanged Fixture Connections . . . . .25402.7 Accessible Plumbing Facilities . . . .25402.8 Supply Fittings . . . . . . . . . . . . . . . .25402.9 Installation . . . . . . . . . . . . . . . . . . .26402.10 Design and Installation of

Plumbing Fixtures . . . . . . . . . . . . . .26402.11 Slip Joint Connections . . . . . . . . . .26402.12 Future Fixtures . . . . . . . . . . . . . . . .26403.0 Water-Conserving Fixtures

and Fittings . . . . . . . . . . . . . . . . . . .26403.1 Flush Volumes . . . . . . . . . . . . . . . .26403.2 Water Closets . . . . . . . . . . . . . . . . .26403.3 Urinals . . . . . . . . . . . . . . . . . . . . . .26403.4 Metered Faucets . . . . . . . . . . . . . . .26403.5 Pre-Rinse Spray Valve . . . . . . . . . .26404.0 Overflows . . . . . . . . . . . . . . . . . . . .26404.1 General . . . . . . . . . . . . . . . . . . . . . .26405.0 Strainers and Connections . . . . . . .26405.1 Strainers . . . . . . . . . . . . . . . . . . . . .26405.2 Continuous Wastes . . . . . . . . . . . . .26406.0 Prohibited Fixtures . . . . . . . . . . . . .26406.1 Prohibited Water Closets . . . . . . . .26406.2 Prohibited Urinals . . . . . . . . . . . . . .26406.3 Miscellaneous Fixtures . . . . . . . . . .26407.0 Special Fixtures and Specialties . .26407.1 Water and Waste Connections . . . .26407.2 Special Use Sinks . . . . . . . . . . . . .26407.3 Special Use Fixtures . . . . . . . . . . .27407.4 Zinc Alloy Components . . . . . . . . . .27408.0 Showers . . . . . . . . . . . . . . . . . . . . .27408.1 Application . . . . . . . . . . . . . . . . . . .27408.2 Water Consumption . . . . . . . . . . . .27408.3 Individual Shower and

Tub-Shower CombinationControl Valves . . . . . . . . . . . . . . . .27

408.4 Waste Outlet . . . . . . . . . . . . . . . . . .27408.5 Finished Curb or Threshold . . . . . .27408.6 Shower Compartments . . . . . . . . . .27408.7 Lining for Showers and

Receptors . . . . . . . . . . . . . . . . . . . .27408.8 Public Shower Floors . . . . . . . . . . .28408.9 Location of Valves and Heads . . . .28

xii UNIFORM PLUMBING CODE



408.10 Water Supply Riser . . . . . . . . . . . . .28409.0 Bathtubs and Whirlpool

Bathtubs . . . . . . . . . . . . . . . . . . . . .28409.1 Application . . . . . . . . . . . . . . . . . . .28409.2 Waste Outlet . . . . . . . . . . . . . . . . . .28409.3 Overflow . . . . . . . . . . . . . . . . . . . . .28409.4 Limitation of Hot Water in

Bathtubs and WhirlpoolBathtubs . . . . . . . . . . . . . . . . . . . . .28

409.5 Backflow Protection . . . . . . . . . . . .28409.6 Installation and Access . . . . . . . . . .28410.0 Bidets . . . . . . . . . . . . . . . . . . . . . . .29410.1 Application . . . . . . . . . . . . . . . . . . .29410.2 Backflow Protection . . . . . . . . . . . .29410.3 Limitation of Water

Temperature in Bidets . . . . . . . . . .29411.0 Water Closets . . . . . . . . . . . . . . . . .29411.1 Water Closet Bowls . . . . . . . . . . . .29411.2 Water Closet Seats . . . . . . . . . . . . .29412.0 Urinals . . . . . . . . . . . . . . . . . . . . . .29412.1 General . . . . . . . . . . . . . . . . . . . . . .29413.0 Flushing Devices for Water

Closets and Urinals . . . . . . . . . . . .29413.1 Application . . . . . . . . . . . . . . . . . . .29413.2 Flushing Devices Required . . . . . .29413.3 Flushometer Valves . . . . . . . . . . . .29413.4 Water Supply for Flush Tanks . . . .29413.5 Overflows in Flush Tanks . . . . . . . .29414.0 Dishwashing Machines . . . . . . . . . .29414.1 Application . . . . . . . . . . . . . . . . . . .29414.2 Backflow Protection . . . . . . . . . . . .29414.3 Drainage Connection . . . . . . . . . . .29415.0 Drinking Fountains . . . . . . . . . . . . .29415.1 Application . . . . . . . . . . . . . . . . . . .29415.2 Where Required . . . . . . . . . . . . . . .29415.3 Drainage Connection . . . . . . . . . . .29415.4 Location . . . . . . . . . . . . . . . . . . . . .29416.0 Emergency Eyewash and

Shower Equipment . . . . . . . . . . . . .30416.1 Application . . . . . . . . . . . . . . . . . . .30416.2 Water Supply . . . . . . . . . . . . . . . . .30416.3 Installation . . . . . . . . . . . . . . . . . . .30416.4 Location . . . . . . . . . . . . . . . . . . . . .30416.5 Drain . . . . . . . . . . . . . . . . . . . . . . . .30417.0 Faucets and Fixture Fittings . . . . . .30417.1 Application . . . . . . . . . . . . . . . . . . .30417.2 Deck Mounted Bath/Shower

Valves . . . . . . . . . . . . . . . . . . . . . . .30417.3 Handheld Showers . . . . . . . . . . . . .30

417.4 Faucets and Fixture Fittingswith Hose Connected Outlets . . . . .30

417.5 Separate Controls for Hot andCold Water . . . . . . . . . . . . . . . . . . .30

418.0 Floor Drains . . . . . . . . . . . . . . . . . .30418.1 Application . . . . . . . . . . . . . . . . . . .30418.2 Strainer . . . . . . . . . . . . . . . . . . . . . .30418.3 Location of Floor Drains . . . . . . . . .30418.4 Food Storage Areas . . . . . . . . . . . .30418.5 Floor Slope . . . . . . . . . . . . . . . . . . .30419.0 Food Waste Disposal Units . . . . . .30419.1 Application . . . . . . . . . . . . . . . . . . .30419.2 Drainage Connection . . . . . . . . . . .30419.3 Water Supply . . . . . . . . . . . . . . . . .30420.0 Sinks . . . . . . . . . . . . . . . . . . . . . . . .30420.1 Application . . . . . . . . . . . . . . . . . . .30420.2 Water Consumption . . . . . . . . . . . .30420.3 Waste Outlet . . . . . . . . . . . . . . . . . .31421.0 Fixtures and Fixture Fittings

for Persons with Disabilities . . . . . .31421.1 General . . . . . . . . . . . . . . . . . . . . . .31421.2 Limitation of Hot Water

Temperature for PublicLavatories . . . . . . . . . . . . . . . . . . . .31

422.0 Minimum Number ofRequired Fixtures . . . . . . . . . . . . . .31

422.1 Fixture Count . . . . . . . . . . . . . . . . .31422.2 Separate Facilities . . . . . . . . . . . . .31422.3 Fixture Requirements for

Special Occupancies . . . . . . . . . . .31422.4 Toilet Facilities Serving

Employees and Customers . . . . . .31422.5 Toilet Facilities for Workers . . . . . .31Table 422.1 Minimum Plumbing Facilities . . . . .32

CHAPTER 5 WATER HEATERS . . . . . . . . . . . . .37501.0 General . . . . . . . . . . . . . . . . . . . . . .37501.1 Applicability . . . . . . . . . . . . . . . . . . .37Table 501.1 First Hour Rating . . . . . . . . . . . . . .37502.0 Permits . . . . . . . . . . . . . . . . . . . . . .37502.1 General . . . . . . . . . . . . . . . . . . . . . .37503.0 Inspection . . . . . . . . . . . . . . . . . . . .37503.1 Inspection of Chimneys or Vents . .37503.2 Final Water Heater Inspection . . . .37504.0 Water Heater Requirements . . . . . .37504.1 Location . . . . . . . . . . . . . . . . . . . . .37504.2 Vent . . . . . . . . . . . . . . . . . . . . . . . .37504.3 Clearance . . . . . . . . . . . . . . . . . . . .37504.4 Pressure-Limiting Devices . . . . . . .38

xiiiUNIFORM PLUMBING CODE



504.5 Temperature-Limiting Devices . . . .38504.6 Temperature, Pressure, and

Vacuum Relief Devices . . . . . . . . . .38505.0 Oil-Burning and Other Water

Heaters . . . . . . . . . . . . . . . . . . . . . .38505.1 Water Heaters . . . . . . . . . . . . . . . . .38505.2 Safety Devices . . . . . . . . . . . . . . . .38505.3 Oil-Fired Water Heaters . . . . . . . . .38505.4 Indirect-Fired Water Heaters . . . . .38506.0 Air for Combustion and

Ventilation . . . . . . . . . . . . . . . . . . . .38506.1 General . . . . . . . . . . . . . . . . . . . . . .38506.2 Indoor Combustion Air . . . . . . . . . .38506.3 Indoor Opening Size and

Location . . . . . . . . . . . . . . . . . . . . .39506.4 Outdoor Combustion Air . . . . . . . . .39506.5 Combination Indoor and

Outdoor Combustion Air . . . . . . . . .41506.6 Engineered Installations . . . . . . . . .41506.7 Mechanical Combustion Air

Supply . . . . . . . . . . . . . . . . . . . . . . .41506.8 Louvers, Grilles, and Screens . . . .41506.9 Combustion Air Ducts . . . . . . . . . . .41507.0 Other Water Heater Installation

Requirements . . . . . . . . . . . . . . . . .42507.1 Dielectric Insulator . . . . . . . . . . . . .42507.2 Seismic Provisions . . . . . . . . . . . . .42507.3 Ground Support . . . . . . . . . . . . . . .42507.4 Drainage Pan . . . . . . . . . . . . . . . . .42507.5 Relief Valve Discharge . . . . . . . . . .42507.6 Added or Converted Appliances . . .42507.7 Types of Gases . . . . . . . . . . . . . . .42507.8 Safety Shutoff Devices for

Unlisted LP-Gas ApplianceUsed Indoors . . . . . . . . . . . . . . . . .42

507.9 Use of Air or Oxygen UnderPressure . . . . . . . . . . . . . . . . . . . . .42

507.10 Protection of Gas Appliancesfrom Fumes or Gases otherthan Products of Combustion . . . . .42

507.11 Process Air . . . . . . . . . . . . . . . . . . .42507.12 Flammable Vapors . . . . . . . . . . . . .42507.13 Installation in Garages . . . . . . . . . .42507.14 Installation in Commercial

Garages . . . . . . . . . . . . . . . . . . . . .43507.15 Installation in Aircraft Hangars . . . .43507.16 Venting of Flue Gases . . . . . . . . . .43507.17 Extra Device or Attachment . . . . . .43507.18 Adequate Capacity of Piping . . . . .43507.19 Avoiding Strain on Gas Piping . . . .43

507.20 Gas Appliance PressureRegulators . . . . . . . . . . . . . . . . . . .43

507.21 Venting of Gas AppliancePressure Regulators . . . . . . . . . . . .43

507.22 Bleed Lines for Diaphragm-TypeValves . . . . . . . . . . . . . . . . . . . . . . .43

507.23 Combination of Appliances . . . . . . .44507.24 Installation Instructions . . . . . . . . . .44507.25 Protection of Outdoor

Appliances . . . . . . . . . . . . . . . . . . .44507.26 Accessibility for Service . . . . . . . . .44508.0 Appliances on Roofs . . . . . . . . . . .44508.1 General . . . . . . . . . . . . . . . . . . . . . .44508.2 Installation of Appliances on

Roofs . . . . . . . . . . . . . . . . . . . . . . .44508.3 Access to Equipment and

Appliances on Roofs . . . . . . . . . . .44508.4 Appliances in Attics and

Under-Floor Spaces . . . . . . . . . . . .44509.0 Venting of Appliances . . . . . . . . . . .45509.1 Minimum Safe Performance . . . . . .45509.2 Connection to Venting Systems . . .45509.3 Design and Construction . . . . . . . .45509.4 Type of Venting System to

be Used . . . . . . . . . . . . . . . . . . . . .46509.5 Masonry, Metal, and

Factory-Built Chimneys . . . . . . . . .46Table 509.4 Type of Venting System to

be Used . . . . . . . . . . . . . . . . . . . . .46509.6 Gas Vents . . . . . . . . . . . . . . . . . . . .48Table 509.6.2 Roof Pitch Height . . . . . . . . . . . . . .49509.7 Single-Wall Metal Pipe . . . . . . . . . .50Table 509.7.3 Clearance for Connectors . . . . . . .51509.8 Through-the-Wall Vent

Termination . . . . . . . . . . . . . . . . . . .52509.9 Condensation Drain . . . . . . . . . . . .53509.10 Vent Connectors for Category I

Appliances . . . . . . . . . . . . . . . . . . .53Table 509.7.3(1) Reduction of Clearances with

Specified Forms of Protection . . . .54Table 509.10.1 Minimum Thickness for

Galvanized Steel Vent Connectorsfor Low-Heat Appliances . . . . . . . .55

Table 509.10.1(1) Minimum Thickness for SteelVent Connectors for Medium-HeatAppliances and Commercial andIndustrial Incinerators . . . . . . . . . . .55

509.11 Draft Hoods and Draft Controls . . .57509.12 Manually Operated Dampers . . . . .57509.13 Automatically Operated

Vent Dampers . . . . . . . . . . . . . . . . .57509.14 Obstructions . . . . . . . . . . . . . . . . . .57

xiv UNIFORM PLUMBING CODE



510.0 Sizing of Category I VentingSystems . . . . . . . . . . . . . . . . . . . . .58

510.1 Installation . . . . . . . . . . . . . . . . . . .58510.2 Additional Requirements to

Multiple Appliance Vent Table 510.2(1)through Table 510.2(9) . . . . . . . . . .59

Table 510.2.1 Vent Connector MaximumLength . . . . . . . . . . . . . . . . . . . . . . .60

511.0 Direct-Vent Appliances . . . . . . . . . .62511.1 General . . . . . . . . . . . . . . . . . . . . . .62Table 510.1.2(1) Type B Double-Wall Gas Vent . . . .64Table 510.1.2(2) Type B Double-Wall Gas Vent . . . .67Table 510.1.2(3) Masonry Chimney . . . . . . . . . . . . . .69Table 510.1.2(4) Masonry Chimney . . . . . . . . . . . . . .71Table 510.1.2(5) Single-Wall Metal Pipe or

Type B Asbestos Cement Vent . . . .73Table 510.1.2(6) Exterior Masonry Chimney . . . . . . .74Table 510.2(1) Type B Double-Wall Vent . . . . . . .75Table 510.2(2) Type B Double-Wall Vent . . . . . . . .79Table 510.2(3) Masonry Chimney . . . . . . . . . . . . . .81Table 510.2(4) Masonry Chimney . . . . . . . . . . . . . .83Table 510.2(5) Single-Wall Metal Pipe or

Type B Asbestos Cement Vent . . . .85Table 510.2(6) Exterior Masonry Chimney . . . . . . .85Table 510.2(7) Exterior Masonry Chimney . . . . . . .86Table 510.2(8) Exterior Masonry Chimney . . . . . . .87Table 510.2(9) Exterior Masonry Chimney . . . . . . .88

CHAPTER 6 WATER SUPPLY ANDDISTRIBUTION . . . . . . . . . . . . . . .89

601.0 Hot and Cold Water Required . . . .89601.1 General . . . . . . . . . . . . . . . . . . . . . .89601.2 Identification of a Potable and

Nonpotable Water System . . . . . . .89Table 601.2.2 Minimum Length of Color

Field and Size of Letters . . . . . . . .89602.0 Unlawful Connections . . . . . . . . . . .89602.1 Prohibited Installation . . . . . . . . . . .89602.2 Cross-Contamination . . . . . . . . . . .90602.3 Backflow Prevention . . . . . . . . . . . .90602.4 Approval by Authority . . . . . . . . . . .90603.0 Cross-Connection Control . . . . . . .90603.1 General . . . . . . . . . . . . . . . . . . . . . .90603.2 Approval of Devices or

Assemblies . . . . . . . . . . . . . . . . . . .90603.3 Backflow Prevention Devices,

Assemblies, and Methods . . . . . . .90Table 603.2 Backflow Prevention Devices,

Assemblies, and Methods . . . . . . .91603.4 General Requirements . . . . . . . . . .92

Table 603.3.1 Minimum Air Gaps for WaterDistribution . . . . . . . . . . . . . . . . . . .93

603.5 Specific Requirements . . . . . . . . . .93604.0 Materials . . . . . . . . . . . . . . . . . . . . .96604.1 Pipe, Tube, and Fittings . . . . . . . . .96604.2 Copper Tube . . . . . . . . . . . . . . . . . .96604.3 Hard-Drawn Copper Tubing . . . . . .96604.4 Flexible Copper Connectors . . . . . .96604.5 Cast-Iron Fittings . . . . . . . . . . . . . .96604.6 Malleable Iron Fittings . . . . . . . . . .96604.7 Previously Used Piping and

Tubing . . . . . . . . . . . . . . . . . . . . . . .96604.8 Epoxy Coating . . . . . . . . . . . . . . . .96604.9 Plastic Materials . . . . . . . . . . . . . . .96604.10 Solder . . . . . . . . . . . . . . . . . . . . . . .96604.11 Lead Content . . . . . . . . . . . . . . . . .96604.12 Flexible Corrugated Connectors . . .96604.13 Water Heater Connectors . . . . . . . .96605.0 Joints and Connections . . . . . . . . .96605.1 Asbestos Cement Pipe and

Joints . . . . . . . . . . . . . . . . . . . . . . .96605.2 Brass Pipe and Joints . . . . . . . . . . .96Table 604.1 Materials for Building Supply

and Water Distribution Pipingand Fittings . . . . . . . . . . . . . . . . . . .97

605.3 Copper Pipe, Tubing, and Joints . .97605.4 CPVC Plastic Pipe and Joints . . . .98605.5 Ductile Iron Pipe and Joints . . . . . .99605.6 Galvanized Steel Pipe and

Joints . . . . . . . . . . . . . . . . . . . . . . .99605.7 PE Plastic Pipe/Tubing and

Joints . . . . . . . . . . . . . . . . . . . . . . .99605.8 PE-AL-PE Plastic Pipe/Tubing

and Joints . . . . . . . . . . . . . . . . . . . .99605.9 PE-RT . . . . . . . . . . . . . . . . . . . . . .100605.10 PEX Plastic Tubing and Joints . . .100605.11 PEX-AL-PEX Plastic Tubing

and Joints . . . . . . . . . . . . . . . . . . .100605.12 Polypropylene (PP) Piping

and Joints . . . . . . . . . . . . . . . . . . .100605.13 PVC Plastic Pipe and Joints . . . . .100605.14 Stainless Steel Pipe and Joints . .101605.15 Slip Joints . . . . . . . . . . . . . . . . . . .101605.16 Dielectric Unions . . . . . . . . . . . . . .101605.17 Joints Between Various

Materials . . . . . . . . . . . . . . . . . . . .101606.0 Valves . . . . . . . . . . . . . . . . . . . . . .101606.1 General . . . . . . . . . . . . . . . . . . . . .101606.2 Fullway Valve . . . . . . . . . . . . . . . .101606.3 Multidwelling Units . . . . . . . . . . . .101

xvUNIFORM PLUMBING CODE



606.4 Multiple Openings . . . . . . . . . . . . .101606.5 Control Valve . . . . . . . . . . . . . . . .101606.6 Accessible . . . . . . . . . . . . . . . . . .101606.7 Multiple Fixtures . . . . . . . . . . . . . .101607.0 Gravity Supply Tanks . . . . . . . . . .102607.1 General . . . . . . . . . . . . . . . . . . . . .102607.2 Potable Water Tanks . . . . . . . . . .102608.0 Water Pressure, Pressure

Regulators, Pressure ReliefValves, and Vacuum ReliefValves . . . . . . . . . . . . . . . . . . . . . .102

608.1 Inadequate Water Pressure . . . . .102608.2 Excessive Water Pressure . . . . . .102608.3 Expansion Tanks,

Combination Pressure, andTemperature Relief Valves . . . . . .102

608.4 Pressure Relief Valves . . . . . . . . .102608.5 Drains . . . . . . . . . . . . . . . . . . . . . .102608.6 Water-Heating Devices . . . . . . . . .102608.7 Vacuum Relief Valves . . . . . . . . . .102609.0 Installation, Testing, Unions,

and Location . . . . . . . . . . . . . . . . .102609.1 Installation . . . . . . . . . . . . . . . . . .102609.2 Trenches . . . . . . . . . . . . . . . . . . . .103609.3 Under Concrete Slab . . . . . . . . . .103609.4 Testing . . . . . . . . . . . . . . . . . . . . .103609.5 Unions . . . . . . . . . . . . . . . . . . . . .103609.6 Location . . . . . . . . . . . . . . . . . . . .103609.7 Abutting Lot . . . . . . . . . . . . . . . . .103609.8 Low-Pressure Cutoff Required

on Booster Pumps for WaterDistribution Systems . . . . . . . . . . .103

609.9 Disinfection of Potable WaterSystem . . . . . . . . . . . . . . . . . . . . .103

609.10 Water Hammer . . . . . . . . . . . . . . .104610.0 Size of Potable Water Piping . . . .104610.1 Size . . . . . . . . . . . . . . . . . . . . . . . .104610.2 Pressure Loss . . . . . . . . . . . . . . . .104610.3 Quantity of Water . . . . . . . . . . . . .104610.4 Parallel Distribution Systems . . . .104610.5 Sizing per Appendices

A and C . . . . . . . . . . . . . . . . . . . . .104610.6 Friction and Pressure Loss . . . . . .104610.7 Conditions for Using

Table 610.4 . . . . . . . . . . . . . . . . . .104610.8 Size of Meter and Building

Supply Pipe Using Table 610.4 . .104610.9 Size of Branches . . . . . . . . . . . . .104Table 610.3 Water Supply Fixture Units

(WSFU) and Minimum FixtureBranch Pipe Sizes . . . . . . . . . . . .105

Table 610.4 Fixture Unit Table forDetermining Water Pipe andMeter Sizes . . . . . . . . . . . . . . . . . .106

610.10 Sizing for Flushometer Valves . . .107Table 610.10 Flushometer Fixture Units

for Water Sizing UsingTable 610.3 . . . . . . . . . . . . . . . . . .107

610.11 Sizing Systems forFlushometer Tanks . . . . . . . . . . . .107

610.12 Sizing for Velocity . . . . . . . . . . . . .107610.13 Exceptions . . . . . . . . . . . . . . . . . .107611.0 Drinking Water Treatment

Units . . . . . . . . . . . . . . . . . . . . . . .108611.1 Application . . . . . . . . . . . . . . . . . .108611.2 Air Gap Discharge . . . . . . . . . . . .108611.3 Connection Tubing . . . . . . . . . . . .108611.4 Sizing of Residential Softeners . .108Table 611.4 Sizing of Residential Water

Softeners . . . . . . . . . . . . . . . . . . .108612.0 Residential Fire Sprinkler

Systems . . . . . . . . . . . . . . . . . . . .108612.1 General . . . . . . . . . . . . . . . . . . . . .108

CHAPTER 7 SANITARY DRAINAGE . . . . . . . .109Part I Drainage Systems . . . . . . . . . . .109701.0 Materials . . . . . . . . . . . . . . . . . . . .109701.1 Drainage Piping . . . . . . . . . . . . . .109701.2 Drainage Fittings . . . . . . . . . . . . .109701.3 Lead . . . . . . . . . . . . . . . . . . . . . . .109701.4 Caulking Ferrules . . . . . . . . . . . . .109701.5 Soldering Bushings . . . . . . . . . . . .109702.0 Fixture Unit Equivalents . . . . . . . .109702.1 Trap Size . . . . . . . . . . . . . . . . . . .109702.2 Intermittent Flow . . . . . . . . . . . . . .109702.3 Continuous Flow . . . . . . . . . . . . . .109Table 701.4 Caulking Ferrules . . . . . . . . . . . . .109Table 701.5 Soldering Bushings . . . . . . . . . . . .109Table 701.1 Materials for Drain, Waste,

Vent Pipe and Fittings . . . . . . . . . .110Table 702.1 Drainage Fixture Unit

Values (DFU) . . . . . . . . . . . . . . . . .111Table 702.2(a) Maximum Drainage Fixture

Units for a Trap and Trap Arm . . .112Table 702.2(b) Discharge Capacity in Gallons

Per Minute for IntermittentFlow Only . . . . . . . . . . . . . . . . . . .112

703.0 Size of Drainage Piping . . . . . . . .112703.1 Minimum Size . . . . . . . . . . . . . . . .112703.2 Maximum Number of Fixture

Units . . . . . . . . . . . . . . . . . . . . . . .112703.3 Sizing per Appendix C . . . . . . . . .112

xvi UNIFORM PLUMBING CODE



704.0 Fixture Connections (Drainage) . .112704.1 Inlet Fittings . . . . . . . . . . . . . . . . .112704.2 Single Vertical Drainage Pipe . . . .112704.3 Commercial Dishwashing

Machines and Sinks . . . . . . . . . . .112705.0 Joints and Connections . . . . . . . .112705.1 ABS and ABS Co-Extruded

Plastic Pipe and Joints . . . . . . . . .112705.2 Asbestos Cement Pipe and

Joints . . . . . . . . . . . . . . . . . . . . . . .112Table 703.2 Maximum Unit Loading and

Maximum Length of Drainageand Vent Piping . . . . . . . . . . . . . . .113

705.3 Brass Pipe and Joints . . . . . . . . . .113705.4 Cast-Iron Pipe and Joints . . . . . . .113705.5 Copper Pipe (DWV) and Joints . .114705.6 Galvanized Steel Pipe

and Joints . . . . . . . . . . . . . . . . . . .114705.7 PVC and PVC Co-Extruded

Plastic Pipe and JoiningMethods . . . . . . . . . . . . . . . . . . . .114

705.8 Stainless Steel Pipe and Joints . .114705.9 Vitrified Clay Pipe and Joints . . . .115705.10 Special Joints . . . . . . . . . . . . . . . .115705.11 Joints Between Various

Materials . . . . . . . . . . . . . . . . . . . .115706.0 Changes in Direction of

Drainage Flow . . . . . . . . . . . . . . . .115706.1 Approved Fittings . . . . . . . . . . . . .115706.2 Horizontal to Vertical . . . . . . . . . . .115706.3 Horizontal to Horizontal . . . . . . . .115706.4 Vertical to Horizontal . . . . . . . . . . .115707.0 Cleanouts . . . . . . . . . . . . . . . . . . .115707.1 Plug . . . . . . . . . . . . . . . . . . . . . . . .115Table 707.1 Cleanouts . . . . . . . . . . . . . . . . . . .116707.2 Approved . . . . . . . . . . . . . . . . . . . .116707.3 Gas and Watertight . . . . . . . . . . . .116707.4 Location . . . . . . . . . . . . . . . . . . . .116707.5 Cleaning . . . . . . . . . . . . . . . . . . . .116707.6 Extension . . . . . . . . . . . . . . . . . . .116707.7 Interceptor . . . . . . . . . . . . . . . . . . .116707.8 Access . . . . . . . . . . . . . . . . . . . . .116707.9 Clearance . . . . . . . . . . . . . . . . . . .116707.10 Fittings . . . . . . . . . . . . . . . . . . . . .116707.11 Pressure Drainage Systems . . . . .116707.12 Countersunk Cleanout Plugs . . . .116707.13 Hubless Blind Plugs . . . . . . . . . . .116707.14 Trap Arms . . . . . . . . . . . . . . . . . . .116708.0 Grade of Horizontal Drainage

Piping . . . . . . . . . . . . . . . . . . . . . .116

708.1 General . . . . . . . . . . . . . . . . . . . . .116709.0 Gravity Drainage Required . . . . . .116709.1 General . . . . . . . . . . . . . . . . . . . . .116710.0 Drainage of Fixtures Located

Below the Next UpstreamManhole or Below the MainSewer Level . . . . . . . . . . . . . . . . .116

710.1 Backflow Protection . . . . . . . . . . .116710.2 Sewage Discharge . . . . . . . . . . . .117710.3 Sewage Ejector and Pumps . . . . .117710.4 Discharge Line . . . . . . . . . . . . . . .117710.5 Size of Building Drains and

Sewers . . . . . . . . . . . . . . . . . . . . .117710.6 Backwater Valves . . . . . . . . . . . . .117710.7 Drainage and Venting Systems . .117710.8 Sump and Receiving Tank

Construction . . . . . . . . . . . . . . . . .117710.9 Alarm . . . . . . . . . . . . . . . . . . . . . . .117710.10 Sump and Receiving Tank

Covers and Vents . . . . . . . . . . . . .117710.11 Air Tanks . . . . . . . . . . . . . . . . . . . .117710.12 Grinder Pump Ejector . . . . . . . . . .118710.13 Macerating Toilet Systems . . . . . .118711.0 Suds Relief . . . . . . . . . . . . . . . . . .118711.1 General . . . . . . . . . . . . . . . . . . . . .118712.0 Testing . . . . . . . . . . . . . . . . . . . . . .118712.1 Media . . . . . . . . . . . . . . . . . . . . . .118712.2 Water Test . . . . . . . . . . . . . . . . . . .118712.3 Air Test . . . . . . . . . . . . . . . . . . . . .118Part II Building Sewers . . . . . . . . . . . . .118713.0 Sewer Required . . . . . . . . . . . . . .118713.1 Where Required . . . . . . . . . . . . . .118713.2 Private Sewage Disposal

System . . . . . . . . . . . . . . . . . . . . .118713.3 Public Sewer . . . . . . . . . . . . . . . . .118713.4 Public Sewer Availability . . . . . . . .118713.5 Permit . . . . . . . . . . . . . . . . . . . . . .118713.6 Lot . . . . . . . . . . . . . . . . . . . . . . . . .119713.7 Installation . . . . . . . . . . . . . . . . . . .119714.0 Damage to Public Sewer

or Private Sewage DisposalSystem . . . . . . . . . . . . . . . . . . . . .119

714.1 Unlawful Practices . . . . . . . . . . . .119714.2 Prohibited Water Discharge . . . . .119714.3 Prohibited Sewer Connection . . . .119714.4 Commercial Food Waste

Grinder . . . . . . . . . . . . . . . . . . . . .119714.5 Tanks . . . . . . . . . . . . . . . . . . . . . . .119715.0 Building Sewer Materials . . . . . . .119715.1 Materials . . . . . . . . . . . . . . . . . . . .119

xviiUNIFORM PLUMBING CODE



715.2 Joining Methods and Materials . . .119715.3 Existing Sewers . . . . . . . . . . . . . .119716.0 Markings . . . . . . . . . . . . . . . . . . . .119716.1 General . . . . . . . . . . . . . . . . . . . . .119717.0 Size of Building Sewers . . . . . . . .119717.1 General . . . . . . . . . . . . . . . . . . . . .119Table 717.1 Maximum/Minimum Fixture

Unit Loading on BuildingSewer Piping . . . . . . . . . . . . . . . . .119

718.0 Grade, Support, and Protectionof Building Sewers . . . . . . . . . . . .119

718.1 Slope . . . . . . . . . . . . . . . . . . . . . . .119718.2 Support . . . . . . . . . . . . . . . . . . . . .120718.3 Protection from Damage . . . . . . .120719.0 Cleanouts. . . . . . . . . . . . . . . . . . .120719.1 Locations . . . . . . . . . . . . . . . . . . .120719.2 No Additional Cleanouts . . . . . . . .120719.3 Building Sewer Cleanouts . . . . . .120719.4 Cleaning . . . . . . . . . . . . . . . . . . . .120719.5 Access . . . . . . . . . . . . . . . . . . . . .120719.6 Manholes . . . . . . . . . . . . . . . . . . .120720.0 Sewer and Water Pipes . . . . . . . .120720.1 General . . . . . . . . . . . . . . . . . . . . .120721.0 Location . . . . . . . . . . . . . . . . . . . .120721.1 Building Sewer . . . . . . . . . . . . . . .120721.2 Abutting Lot . . . . . . . . . . . . . . . . .120722.0 Abandoned Sewers and Sewage

Disposal Facilities . . . . . . . . . . . . .120722.1 Building (House) Sewer . . . . . . . .120Table 721.1 Minimum Horizontal Distance

Required from Building Sewer . . .121722.2 Cesspools, Septic Tanks, and

Seepage Pits . . . . . . . . . . . . . . . .121722.3 Filling . . . . . . . . . . . . . . . . . . . . . .121722.4 Ownership . . . . . . . . . . . . . . . . . .121722.5 Disposal Facilities . . . . . . . . . . . . .121723.0 Building Sewer Test . . . . . . . . . . .121723.1 General . . . . . . . . . . . . . . . . . . . . .121

CHAPTER 8 INDIRECT WASTES . . . . . . . . . .123801.0 Indirect Wastes . . . . . . . . . . . . . . .123801.1 Air Gap or Air Break Required . . .123801.2 Food and Beverage Handling

Establishments . . . . . . . . . . . . . . .123801.3 Bar and Fountain Sink Traps . . . .123801.4 Connections from Water

Distribution System . . . . . . . . . . . .123801.5 Sterilizers . . . . . . . . . . . . . . . . . . .123801.6 Drip or Drainage Outlets . . . . . . . .123

802.0 Approvals . . . . . . . . . . . . . . . . . . .123802.1 General . . . . . . . . . . . . . . . . . . . . .123803.0 Indirect Waste Piping . . . . . . . . . .123803.1 General . . . . . . . . . . . . . . . . . . . . .123804.0 Indirect Waste Receptors . . . . . . .124804.1 Standpipe Receptors . . . . . . . . . .124805.0 Pressure Drainage Connections .124805.1 General . . . . . . . . . . . . . . . . . . . . .124806.0 Sterile Equipment . . . . . . . . . . . . .124806.1 General . . . . . . . . . . . . . . . . . . . . .124807.0 Appliances . . . . . . . . . . . . . . . . . .124807.1 Non-Classed Apparatus . . . . . . . .124807.2 Condensate Waste . . . . . . . . . . . .124807.3 Undiluted Condensate Waste . . . .124807.4 Domestic Dishwashing

Machine . . . . . . . . . . . . . . . . . . . .124808.0 Cooling Water . . . . . . . . . . . . . . . .124808.1 General . . . . . . . . . . . . . . . . . . . . .124809.0 Drinking Fountains . . . . . . . . . . . .124809.1 General . . . . . . . . . . . . . . . . . . . . .124810.0 Steam and Hot Water Drainage

Condensers and Sumps . . . . . . . .124810.1 High Temperature Discharge . . . .124Table 810.1 Pipe Connections in Blowoff

Condensers and Sumps . . . . . . . .125810.2 Sumps, Condensers, and

Intercepting Tanks . . . . . . . . . . . .125810.3 Cleaning . . . . . . . . . . . . . . . . . . . .125810.4 Strainers . . . . . . . . . . . . . . . . . . . .125811.0 Chemical Wastes . . . . . . . . . . . . .125811.1 Pretreatment . . . . . . . . . . . . . . . . .125811.2 Waste and Vent Pipes . . . . . . . . .125811.3 Joining Materials . . . . . . . . . . . . . .125811.4 Access . . . . . . . . . . . . . . . . . . . . .125811.5 Permanent Record . . . . . . . . . . . .125811.6 Chemical Vent . . . . . . . . . . . . . . .125811.7 Discharge . . . . . . . . . . . . . . . . . . .125811.8 Diluted Chemicals . . . . . . . . . . . . .125812.0 Clear Water Wastes . . . . . . . . . . .125812.1 General . . . . . . . . . . . . . . . . . . . . .125813.0 Swimming Pools . . . . . . . . . . . . . .125813.1 General . . . . . . . . . . . . . . . . . . . . .125814.0 Condensate Wastes and Control .125814.1 Condensate Disposal . . . . . . . . . .125Table 814.1 Minimum Condensate

Pipe Size . . . . . . . . . . . . . . . . . . .126814.2 Size . . . . . . . . . . . . . . . . . . . . . . . .126814.3 Point of Discharge . . . . . . . . . . . .126

xviii UNIFORM PLUMBING CODE



CHAPTER 9 VENTS . . . . . . . . . . . . . . . . . . . . .127901.0 General . . . . . . . . . . . . . . . . . . . . .127901.1 Vents Required . . . . . . . . . . . . . . .127901.2 Trap Seal Protection . . . . . . . . . . .127902.0 Vents Not Required . . . . . . . . . . .127902.1 Interceptor . . . . . . . . . . . . . . . . . .127902.2 Bars, Soda Fountains, and

Counter . . . . . . . . . . . . . . . . . . . . .127903.0 Materials . . . . . . . . . . . . . . . . . . . .127903.1 Applicable Standards . . . . . . . . . .127903.2 Use of Copper Tubing . . . . . . . . .127903.3 Changes in Direction . . . . . . . . . .127904.0 Size of Vents . . . . . . . . . . . . . . . .127904.1 Size . . . . . . . . . . . . . . . . . . . . . . . .127904.2 Length . . . . . . . . . . . . . . . . . . . . . .127905.0 Vent Pipe Grades and

Connections . . . . . . . . . . . . . . . . .127905.1 Grade . . . . . . . . . . . . . . . . . . . . . .127905.2 Horizontal Drainage Pipe . . . . . . .128905.3 Vent Pipe Rise . . . . . . . . . . . . . . .128905.4 Roof Termination . . . . . . . . . . . . .128905.5 Location of Opening . . . . . . . . . . .128905.6 Common Vertical Pipe . . . . . . . . .128906.0 Vent Termination . . . . . . . . . . . . . .128906.1 Roof Termination . . . . . . . . . . . . .128906.2 Clearance . . . . . . . . . . . . . . . . . . .128906.3 Use of Roof . . . . . . . . . . . . . . . . .128906.4 Outdoor Installations . . . . . . . . . . .128906.5 Joints . . . . . . . . . . . . . . . . . . . . . .128906.6 Lead . . . . . . . . . . . . . . . . . . . . . . .128906.7 Frost or Snow Closure . . . . . . . . .128907.0 Vent Stacks and Relief Vents . . . .128907.1 Drainage Stack . . . . . . . . . . . . . . .128907.2 Yoke Vent . . . . . . . . . . . . . . . . . . .128908.0 Wet Venting . . . . . . . . . . . . . . . . .128908.1 Vertical Wet Venting . . . . . . . . . . .128908.2 Horizontal Wet Venting for

Bathroom Groups . . . . . . . . . . . . .129909.0 Special Venting for Island

Fixtures . . . . . . . . . . . . . . . . . . . . .129909.1 General . . . . . . . . . . . . . . . . . . . . .129910.0 Combination Waste and Vent

Systems . . . . . . . . . . . . . . . . . . . .129910.1 Where Permitted . . . . . . . . . . . . . .129910.2 Approval . . . . . . . . . . . . . . . . . . . .129910.3 Vents . . . . . . . . . . . . . . . . . . . . . . .129910.4 Size . . . . . . . . . . . . . . . . . . . . . . . .129910.5 Vertical Waste Pipe . . . . . . . . . . .129910.6 Cleanouts . . . . . . . . . . . . . . . . . . .129

910.7 Fixtures . . . . . . . . . . . . . . . . . . . . .129911.0 Engineered Vent System . . . . . . .130911.1 General . . . . . . . . . . . . . . . . . . . . .130911.2 Minimum Requirements . . . . . . . .130

CHAPTER 10 TRAPS ANDINTERCEPTORS . . . . . . . . . . . . .131

1001.0 Traps Required . . . . . . . . . . . . . . .1311001.1 Where Required . . . . . . . . . . . . . .1311002.0 Traps Protected by Vent Pipes . . .1311002.1 Vent Pipes . . . . . . . . . . . . . . . . . .1311002.2 Fixture Traps . . . . . . . . . . . . . . . . .131Table 1002.2 Horizontal Lengths of Trap

Arms . . . . . . . . . . . . . . . . . . . . . . .1311002.3 Change of Direction . . . . . . . . . . .1311002.4 Vent Pipe Opening . . . . . . . . . . . .1311003.0 Traps — Described . . . . . . . . . . . .1311003.1 General Requirements . . . . . . . . .1311003.2 Slip Joint Fittings . . . . . . . . . . . . .1311003.3 Size . . . . . . . . . . . . . . . . . . . . . . . .1321004.0 Traps . . . . . . . . . . . . . . . . . . . . . . .1321004.1 Prohibited . . . . . . . . . . . . . . . . . . .1321004.2 Movable Parts . . . . . . . . . . . . . . . .1321005.0 Trap Seals . . . . . . . . . . . . . . . . . .1321005.1 General . . . . . . . . . . . . . . . . . . . . .1321006.0 Floor Drain Traps . . . . . . . . . . . . .1321006.1 General . . . . . . . . . . . . . . . . . . . . .1321007.0 Trap Seal Protection . . . . . . . . . . .1321007.1 General . . . . . . . . . . . . . . . . . . . . .1321008.0 Building Traps . . . . . . . . . . . . . . . .1321008.1 General . . . . . . . . . . . . . . . . . . . . .1321009.0 Industrial Interceptors

(Clarifiers) and Separators . . . . . .1321009.1 Where Required . . . . . . . . . . . . . .1321009.2 Approval . . . . . . . . . . . . . . . . . . . .1321009.3 Design . . . . . . . . . . . . . . . . . . . . .1321009.4 Relief Vent . . . . . . . . . . . . . . . . . .1321009.5 Location . . . . . . . . . . . . . . . . . . . .1321009.6 Maintenance of Interceptors . . . . .1321009.7 Discharge . . . . . . . . . . . . . . . . . . .1321010.0 Slaughterhouses, Packing

Establishments, etc . . . . . . . . . . .1321010.1 General . . . . . . . . . . . . . . . . . . . . .1321011.0 Minimum Requirements for

Auto Wash Racks . . . . . . . . . . . . .1321011.1 General . . . . . . . . . . . . . . . . . . . . .1321012.0 Commercial and Industrial

Laundries . . . . . . . . . . . . . . . . . . .1331012.1 General . . . . . . . . . . . . . . . . . . . . .133

xixUNIFORM PLUMBING CODE



1013.0 Bottling Establishments . . . . . . . .1331013.1 General . . . . . . . . . . . . . . . . . . . . .1331014.0 Grease Interceptors . . . . . . . . . . .1331014.1 Where Required . . . . . . . . . . . . . .1331014.2 Hydromechanical Grease

Interceptors . . . . . . . . . . . . . . . . . .1331014.3 Gravity Grease Interceptors . . . . .133Table 1014.2.1 Hydromechanical Grease

Interceptor Sizing UsingGravity Flow Rates . . . . . . . . . . . .134

1015.0 FOG (Fats, Oils, and Greases)Disposal System . . . . . . . . . . . . . .134

1015.1 Purpose . . . . . . . . . . . . . . . . . . . .134Table 1014.3.6 Gravity Grease Interceptor

Sizing . . . . . . . . . . . . . . . . . . . . . .1351015.2 Scope . . . . . . . . . . . . . . . . . . . . . .1351015.3 Components, Materials, and

Equipment . . . . . . . . . . . . . . . . . .1351015.4 Sizing Application and

Installation . . . . . . . . . . . . . . . . . .1351015.5 Performance . . . . . . . . . . . . . . . . .1351016.0 Sand Interceptors . . . . . . . . . . . . .1351016.1 Discharge . . . . . . . . . . . . . . . . . . .1351016.2 Authority Having Jurisdiction . . . .1351016.3 Construction and Size . . . . . . . . .1351016.4 Separate Use . . . . . . . . . . . . . . . .1351017.0 Oil and Flammable Liquid

Interceptors . . . . . . . . . . . . . . . . . .1361017.1 Interceptors Required . . . . . . . . . .1361017.2 Design of Interceptors . . . . . . . . .136

CHAPTER 11 STORM DRAINAGE . . . . . . . . . .1371101.0 General . . . . . . . . . . . . . . . . . . . . .1371101.1 Where Required . . . . . . . . . . . . . .1371101.2 Storm Water Drainage to

Sanitary Sewer Prohibited . . . . . .1371101.3 Material Uses . . . . . . . . . . . . . . . .1371101.4 Expansion Joints Required . . . . . .1371101.5 Subsoil Drains . . . . . . . . . . . . . . .1371101.6 Building Subdrains . . . . . . . . . . . .1371101.7 Areaway Drains . . . . . . . . . . . . . .1371101.8 Window Areaway Drains . . . . . . .1381101.9 Filling Stations and Motor

Vehicle WashingEstablishments . . . . . . . . . . . . . . .138

1101.10 Paved Areas . . . . . . . . . . . . . . . . .1381101.11 Roof Drainage . . . . . . . . . . . . . . .1381101.12 Cleanouts . . . . . . . . . . . . . . . . . . .1381101.13 Rainwater Sumps . . . . . . . . . . . . .1381102.0 Materials . . . . . . . . . . . . . . . . . . . .138

1102.1 Conductors . . . . . . . . . . . . . . . . . .1381102.2 Leaders . . . . . . . . . . . . . . . . . . . . .1381102.3 Underground Building Storm

Drains . . . . . . . . . . . . . . . . . . . . . .1391102.4 Building Storm Sewers . . . . . . . . .1391102.5 Subsoil Drains . . . . . . . . . . . . . . .139Table 1102.5 Materials for Subsoil Drain

Pipe and Fittings . . . . . . . . . . . . . .1391103.0 Traps on Storm Drains and

Leaders . . . . . . . . . . . . . . . . . . . . .1391103.1 Where Required . . . . . . . . . . . . . .1391103.2 Where Not Required . . . . . . . . . . .1391103.3 Trap Size . . . . . . . . . . . . . . . . . . .1391103.4 Method of Installation of

Combined Sewer . . . . . . . . . . . . .1391104.0 Leaders, Conductors, and

Connections . . . . . . . . . . . . . . . . .1391104.1 Improper Use . . . . . . . . . . . . . . . .1391104.2 Protection of Leaders . . . . . . . . . .1391104.3 Combining Storm with

Sanitary Drainage . . . . . . . . . . . . .1391105.0 Roof Drains . . . . . . . . . . . . . . . . . .1391105.1 Materials . . . . . . . . . . . . . . . . . . . .1391105.2 Dome or Strainer for

General Use . . . . . . . . . . . . . . . . .1391105.3 Strainers for Flat Decks . . . . . . . .1391105.4 Roof Drain Flashings . . . . . . . . . .1391106.0 Size of Leaders, Conductors,

and Storm Drains . . . . . . . . . . . . .1391106.1 Vertical Conductors

and Leaders . . . . . . . . . . . . . . . . .1391106.2 Size of Horizontal Storm

Drains and Sewers . . . . . . . . . . . .1391106.3 Size of Roof Gutters . . . . . . . . . . .1391106.4 Side Walls Draining onto

a Roof . . . . . . . . . . . . . . . . . . . . . .1401107.0 Values for Continuous Flow . . . . .1401107.1 General . . . . . . . . . . . . . . . . . . . . .1401108.0 Controlled-Flow Roof Drainage . . .1401108.1 Application . . . . . . . . . . . . . . . . . .140Table 1108.1(2) Controlled-Flow Maximum

Roof Water Depth . . . . . . . . . . . . .1401108.2 Setback Roofs . . . . . . . . . . . . . . .140Table 1108.1(8) Distance of Scupper Bottoms

Above Roof . . . . . . . . . . . . . . . . . .1411109.0 Testing . . . . . . . . . . . . . . . . . . . . .1411109.1 Testing Required . . . . . . . . . . . . . .1411109.2 Methods of Testing Storm

Drainage Systems . . . . . . . . . . . .141Table 1101.7 Sizing of Horizontal

Rainwater Piping . . . . . . . . . . . . .142

xx UNIFORM PLUMBING CODE



Table 1101.11 Sizing Roof Drains, Leaders,and Vertical Rainwater Piping . . .143

Table 1106.3 Size of Gutters . . . . . . . . . . . . . . .144

CHAPTER 12 FUEL GAS PIPING . . . . . . . . . . .1451201.0 Scope of Gas Piping . . . . . . . . . . .1451201.1 Coverage of Piping System . . . . .1451201.2 Piping System Requirements . . . .1451201.3 Application . . . . . . . . . . . . . . . . . .1451202.0 General . . . . . . . . . . . . . . . . . . . . .1451202.1 Installation . . . . . . . . . . . . . . . . . .1451203.0 Inspection . . . . . . . . . . . . . . . . . . .1451203.1 Inspection Notification . . . . . . . . .1451203.2 Excavation . . . . . . . . . . . . . . . . . .1451203.3 Type of Inspections . . . . . . . . . . .1451203.4 Inspection Waived . . . . . . . . . . . .1451204.0 Certificate of Inspection . . . . . . . .1461204.1 Issuance . . . . . . . . . . . . . . . . . . . .1461204.2 Gas Supplier . . . . . . . . . . . . . . . . .1461204.3 Unlawful . . . . . . . . . . . . . . . . . . . .1461205.0 Authority to Render Gas

Service . . . . . . . . . . . . . . . . . . . . .1461205.1 Authorized Personnel . . . . . . . . . .1461205.2 Outlets . . . . . . . . . . . . . . . . . . . . .1461206.0 Authority to Disconnect . . . . . . . .1461206.1 Disconnection . . . . . . . . . . . . . . . .1461206.2 Notice . . . . . . . . . . . . . . . . . . . . . .1461206.3 Capped Outlets . . . . . . . . . . . . . . .1461207.0 Temporary Use of Gas . . . . . . . . .1461207.1 General . . . . . . . . . . . . . . . . . . . . .1461208.0 Gas Piping System Design,

Materials, and Components . . . . .1461208.1 Installation of Piping System . . . .1461208.2 Provision for Location of

Point of Delivery . . . . . . . . . . . . . .1461208.3 Interconnections Between

Gas Piping Systems . . . . . . . . . . .1461208.4 Sizing of Gas Piping Systems . . .1461208.5 Acceptable Piping Materials

and Joining Methods . . . . . . . . . .147Table 1208.4.1 Approximate Gas Input for

Typical Appliances . . . . . . . . . . . .147Table 1208.5.7.2 Specifications for Threading

Metallic Pipe . . . . . . . . . . . . . . . . .1481208.6 Gas Meters . . . . . . . . . . . . . . . . . .1501208.7 Gas Pressure Regulators . . . . . . .1501208.8 Backpressure Protection . . . . . . .1511208.9 Low-Pressure Protection . . . . . . .1511208.10 Shutoff Valves . . . . . . . . . . . . . . . .151

1208.11 Expansion and Flexibility . . . . . . .1511209.0 Excess Flow Valve . . . . . . . . . . . .1511209.1 General . . . . . . . . . . . . . . . . . . . . .1511210.0 Gas Piping Installation . . . . . . . . .1511210.1 Piping Underground . . . . . . . . . . .1511210.2 Installation of Piping . . . . . . . . . . .152Table 1210.2.4.1 Support of Piping . . . . . . . . . . . . .1531210.3 Concealed Piping in Buildings . . .1531210.4 Piping in Vertical Chases . . . . . . .1531210.5 Maximum Design Operating

Pressure . . . . . . . . . . . . . . . . . . . .1541210.6 Appliance Overpressure

Protection . . . . . . . . . . . . . . . . . . .1541210.7 Gas Pipe Turns . . . . . . . . . . . . . . .1541210.8 Drips and Sediment Traps . . . . . .1541210.9 Outlets . . . . . . . . . . . . . . . . . . . . .1551210.10 Branch Pipe Connection . . . . . . . .1551210.11 Manual Gas Shutoff Valves . . . . .1551210.12 Prohibited Devices . . . . . . . . . . . .1551210.13 Systems Containing Gas-Air

Mixtures Outside theFlammable Range . . . . . . . . . . . .155

1210.14 Systems Containing FlammableGas-Air Mixtures . . . . . . . . . . . . . .155

1210.15 Electrical Bonding andGrounding . . . . . . . . . . . . . . . . . . .155

1210.16 Electrical Circuits . . . . . . . . . . . . .1561210.17 Electrical Connections . . . . . . . . .1561211.0 Appliance Connections to

Building Piping . . . . . . . . . . . . . . .1561211.1 Connecting Gas Appliances . . . . .1561211.2 Suspended Low-Intensity

Infrared Tube Heaters . . . . . . . . .1561211.3 Use of Nonmetallic Gas Hose

Connectors . . . . . . . . . . . . . . . . . .1561211.4 Connection of Portable

and Mobile IndustrialGas Appliances . . . . . . . . . . . . . . .156

1211.5 Appliance Shutoff Valvesand Connections . . . . . . . . . . . . . .157

1211.6 Quick-Disconnect Devices . . . . . .1571211.7 Gas Convenience Outlets . . . . . .1571211.8 Sediment Trap . . . . . . . . . . . . . . .1571211.9 Installation of Piping . . . . . . . . . . .1571212.0 Liquefied Petroleum Gas

Facilities and Piping . . . . . . . . . . .1571212.1 General . . . . . . . . . . . . . . . . . . . . .1571213.0 Pressure Testing and Inspection .1571213.1 Piping Installations . . . . . . . . . . . .1571213.2 Test Preparation . . . . . . . . . . . . . .158

xxiUNIFORM PLUMBING CODE



1213.3 Test Pressure . . . . . . . . . . . . . . . .1581213.4 Detection of Leaks and Defects . .1581213.5 Piping Systems Leak Test . . . . . .1581213.6 Purging Requirements . . . . . . . . .158Table 1213.6.1 Size and Length of Piping . . . . . .1591214.0 Interconnections Between

Gas Piping Systems . . . . . . . . . . .1601214.1 Interconnections Supplying

Separate Users . . . . . . . . . . . . . . .1601214.2 Interconnections for Standby

Fuels . . . . . . . . . . . . . . . . . . . . . . .1601215.0 Required Gas Supply . . . . . . . . . .1601215.1 General . . . . . . . . . . . . . . . . . . . . .1601215.2 Volume . . . . . . . . . . . . . . . . . . . . .1601215.3 Gas Appliances . . . . . . . . . . . . . . .1601215.4 Size of Piping Outlets . . . . . . . . . .1601216.0 Required Gas Piping Size . . . . . .1601216.1 Pipe Sizing Methods . . . . . . . . . . .1601216.2 Tables for Sizing Gas Piping

Systems . . . . . . . . . . . . . . . . . . . .1601216.3 Sizing Equations . . . . . . . . . . . . . .160Table 1216.3 Cr and Y for Natural Gas and

Undiluted Propane at StandardConditions . . . . . . . . . . . . . . . . . . .161

1216.4 Sizing of Piping Sections . . . . . . .1611216.5 Engineering Methods . . . . . . . . . .1611216.6 Variable Gas Pressure . . . . . . . . .161Table 1216.2(1) Schedule 40 Metallic Pipe . . . . . .163Table 1216.2(2) Schedule 40 Metallic Pipe . . . . . .164Table 1216.2(3) Schedule 40 Metallic Pipe . . . . . .165Table 1216.2(4) Schedule 40 Metallic Pipe . . . . . .166Table 1216.2(5) Schedule 40 Metallic Pipe . . . . . .167Table 1216.2(6) Schedule 40 Metallic Pipe . . . . . .168Table 1216.2(7) Semi-Rigid Copper Tubing . . . . . .169Table 1216.2(8) Semi-Rigid Copper Tubing . . . . . .170Table 1216.2(9) Semi-Rigid Copper Tubing . . . . . .171Table 1216.2(10) Semi-Rigid Copper Tubing . . . . . .172Table 1216.2(11) Semi-Rigid Copper Tubing . . . . . .173Table 1216.2(12) Semi-Rigid Copper Tubing . . . . . .174Table 1216.2(13) Semi-Rigid Copper Tubing . . . . . .175Table 1216.2(14) Corrugated Stainless Steel

Tubing (CSST) . . . . . . . . . . . . . . .176Table 1216.2(15) Corrugated Stainless Steel




Tubing (CSST) . . . . . . . . . . . . . . .180

Table 1216.2(19) Polyethylene Plastic Pipe . . . . . . .181Table 1216.2(20) Polyethylene Plastic Pipe . . . . . . .182Table 1216.2(21) Polyethylene Plastic Pipe . . . . . . .183Table 1216.2(22) Polyethylene Plastic Tubing . . . . .184Table 1216.2(23) Polyethylene Plastic Tubing . . . . .184Table 1216.2(24) Schedule 40 Metallic Pipe . . . . . .185Table 1216.2(25) Schedule 40 Metallic Pipe . . . . . .186Table 1216.2(26) Schedule 40 Metallic Pipe . . . . . .187Table 1216.2(27) Schedule 40 Metallic Pipe . . . . . .188Table 1216.2(28) Semi-Rigid Copper Tubing . . . . . .189Table 1216.2(29) Semi-Rigid Copper Tubing . . . . . .190Table 1216.2(30) Semi-Rigid Copper Tubing . . . . . .191Table 1216.2(31) Corrugated Stainless Steel



Tubing (CSST) . . . . . . . . . . . . . . .194Table 1216.2(34) Polyethylene Plastic Pipe . . . . . . .195Table 1216.2(35) Polyethylene Plastic Pipe . . . . . . .196Table 1216.2(36) Polyethylene Plastic Tubing . . . . .197

CHAPTER 13 HEALTH CARE FACILITIESAND MEDICAL GAS ANDVACUUM SYSTEMS . . . . . . . . . .199

Part I Special Requirements forHealth Care Facilities . . . . . . . . .199

1301.0 Application . . . . . . . . . . . . . . . . . .1991301.1 Where Required . . . . . . . . . . . . . .1991301.2 Health Care Facilities . . . . . . . . . .1991301.3 Breathing Air Replenishment

(BAR) System . . . . . . . . . . . . . . . .1991302.0 Medical Gas and Vacuum

Piping Systems – InstallationRequirements . . . . . . . . . . . . . . . .199

1302.1 General . . . . . . . . . . . . . . . . . . . . .1991302.2 Manufacturer’s Instructions . . . . .1991302.3 Installation . . . . . . . . . . . . . . . . . .1991302.4 Brazing . . . . . . . . . . . . . . . . . . . . .1991302.5 Documentation . . . . . . . . . . . . . . .1991303.0 Protrusions from Walls . . . . . . . . .1991303.1 Drinking Fountain Control

Valves . . . . . . . . . . . . . . . . . . . . . .1991303.2 Exposed Piping . . . . . . . . . . . . . . .1991304.0 Psychiatric Patient Rooms . . . . . .1991304.1 General . . . . . . . . . . . . . . . . . . . . .1991305.0 Locations for Ice Storage . . . . . . .1991305.1 General . . . . . . . . . . . . . . . . . . . . .1991306.0 Sterilizers . . . . . . . . . . . . . . . . . . .1991306.1 General . . . . . . . . . . . . . . . . . . . . .199

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1306.2 Indirect Waste Connections . . . . .1991307.0 Vapor Vents and Stacks for

Sterilizers . . . . . . . . . . . . . . . . . . .1991307.1 General . . . . . . . . . . . . . . . . . . . . .1991308.0 Aspirators . . . . . . . . . . . . . . . . . . .2001308.1 General . . . . . . . . . . . . . . . . . . . . .200Part II Medical Gas and Vacuum

Systems . . . . . . . . . . . . . . . . . . . .2001309.0 Application . . . . . . . . . . . . . . . . . .2001309.1 General . . . . . . . . . . . . . . . . . . . . .2001309.2 Purpose . . . . . . . . . . . . . . . . . . . .2001309.3 Terms . . . . . . . . . . . . . . . . . . . . . .2001309.4 Portable Compressed Gas

Systems . . . . . . . . . . . . . . . . . . . .2001309.5 Where Not Applicable . . . . . . . . . .2001309.6 Requirements . . . . . . . . . . . . . . . .2001309.7 Existing Systems . . . . . . . . . . . . .2001310.0 General Requirements . . . . . . . . .2001310.1 Oxygen Compatibility . . . . . . . . . .2001310.2 Certification . . . . . . . . . . . . . . . . . .2001310.3 Documentation . . . . . . . . . . . . . . .2001310.4 Supply Source . . . . . . . . . . . . . . .2011310.5 Health Care Organization

Personnel . . . . . . . . . . . . . . . . . . .2011310.6 Brazing Procedures . . . . . . . . . . .2011311.0 Plan Review . . . . . . . . . . . . . . . . .2011311.1 Plans and Specifications . . . . . . .2011311.2 Requirements . . . . . . . . . . . . . . . .2011311.3 Extent of Work . . . . . . . . . . . . . . .2011311.4 Record . . . . . . . . . . . . . . . . . . . . .2011312.0 System Performance . . . . . . . . . .2011312.1 Required Operating Pressures . . .2011312.2 Minimum Flow Rates . . . . . . . . . .2011312.3 Minimum Station Outlets/Inlets . . .201Table 1312.1 Standard Designation Colors

and Operating Pressures forGas and Vacuum Systems . . . . . .202

Table 1312.2 Minimum Flow Rates . . . . . . . . . .2021313.0 Required Pipe Sizing . . . . . . . . . .2021313.1 Maximum Demand . . . . . . . . . . . .2021313.2 Sizing Procedures . . . . . . . . . . . .202Table 1312.3 Minimum Outlets/Inlets per

Station . . . . . . . . . . . . . . . . . . . . .2031313.3 Engineering Methods . . . . . . . . . .2031314.0 Workmanship . . . . . . . . . . . . . . . .2031314.1 Accepted Engineering

Practices . . . . . . . . . . . . . . . . . . . .2031314.2 Imperfections . . . . . . . . . . . . . . . .2031314.3 Burred Ends . . . . . . . . . . . . . . . . .203

1315.0 Materials . . . . . . . . . . . . . . . . . . . .2031315.1 General . . . . . . . . . . . . . . . . . . . . .2031315.2 Cleaning . . . . . . . . . . . . . . . . . . . .2031315.3 Delivery . . . . . . . . . . . . . . . . . . . . .203Table 1313.1 System Sizing – Flow

Requirements for StationInlet/Outlet . . . . . . . . . . . . . . . . . .204

Table 1313.2 Size of Gas/Vacuum Piping . . . . .2041315.4 Tubes . . . . . . . . . . . . . . . . . . . . . .2041315.5 Changes in Direction . . . . . . . . . .2051315.6 Special Fittings . . . . . . . . . . . . . . .2051315.7 Prohibited Joints . . . . . . . . . . . . . .2051315.8 Shutoff Valves . . . . . . . . . . . . . . . .2051315.9 Soldered Joints . . . . . . . . . . . . . . .2051316.0 Cleaning for Medical Gas

Piping Systems . . . . . . . . . . . . . . .2051316.1 Cleaning . . . . . . . . . . . . . . . . . . . .2051316.2 Contaminated Materials . . . . . . . .2051317.0 Installation of Piping . . . . . . . . . . .2051317.1 Pipe Protection . . . . . . . . . . . . . . .2051317.2 Location . . . . . . . . . . . . . . . . . . . .2061317.3 Frost Protection . . . . . . . . . . . . . .2061317.4 Underground Piping . . . . . . . . . . .2061317.5 Connectors . . . . . . . . . . . . . . . . . .2061317.6 Positive-Pressure Medical

Gas Piping DistributionSystems . . . . . . . . . . . . . . . . . . . .206

1317.7 Support . . . . . . . . . . . . . . . . . . . . .2061317.8 Seismic Provisions . . . . . . . . . . . .2061317.9 Testing . . . . . . . . . . . . . . . . . . . . .2061317.10 Labeled . . . . . . . . . . . . . . . . . . . . .2061318.0 Joints . . . . . . . . . . . . . . . . . . . . . .2071318.1 General . . . . . . . . . . . . . . . . . . . . .2071318.2 Brazed Joints . . . . . . . . . . . . . . . .2071318.3 Tube Ends . . . . . . . . . . . . . . . . . .2071318.4 Cleaning Procedures . . . . . . . . . .207Table 1317.7 Maximum Pipe Support

Spacing . . . . . . . . . . . . . . . . . . . . .2071318.5 Flux . . . . . . . . . . . . . . . . . . . . . . . .2081318.6 Heat and Brazing . . . . . . . . . . . . .2081318.7 Purge Gas . . . . . . . . . . . . . . . . . .2081318.8 Prohibited Joints . . . . . . . . . . . . . .2081319.0 Valves – Requirements,

Locations, and Labeling . . . . . . . .2091319.1 General Requirements . . . . . . . . .2091319.2 In-Line Shutoff Valves . . . . . . . . . .2091319.3 Future Piping . . . . . . . . . . . . . . . .2091319.4 Source Valves . . . . . . . . . . . . . . . .2091319.5 Main Valves . . . . . . . . . . . . . . . . .209

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1319.6 Riser Valves . . . . . . . . . . . . . . . . .2091319.7 Zone Valves . . . . . . . . . . . . . . . . .2101319.8 Service Valves . . . . . . . . . . . . . . .2101320.0 Pressure-Regulating Equipment . .2101320.1 Where Required . . . . . . . . . . . . . .2101320.2 Pressure-Relief Valves . . . . . . . . .2101320.3 Pressure Gauges . . . . . . . . . . . . .2101321.0 Station Outlets/Inlets . . . . . . . . . .2101321.1 General . . . . . . . . . . . . . . . . . . . . .2101321.2 Post Installation . . . . . . . . . . . . . .2101322.0 Labeling and Identification . . . . . .2101322.1 General . . . . . . . . . . . . . . . . . . . . .2101322.2 Pipe Labeling . . . . . . . . . . . . . . . .2101322.3 Shutoff Valve Identification . . . . . .2111322.4 Station Outlet/Inlet

Identification . . . . . . . . . . . . . . . . .2111322.5 Shutoff Valve Labeling . . . . . . . . .2111323.0 Alarms . . . . . . . . . . . . . . . . . . . . . .2111323.1 General . . . . . . . . . . . . . . . . . . . . .2111323.2 Components . . . . . . . . . . . . . . . . .2111324.0 Medical Air System . . . . . . . . . . . .2111324.1 General . . . . . . . . . . . . . . . . . . . . .2111324.2 Medical Air Compressors . . . . . . .2111324.3 Air Source . . . . . . . . . . . . . . . . . . .2121324.4 Air Intakes . . . . . . . . . . . . . . . . . . .2121324.5 Drains . . . . . . . . . . . . . . . . . . . . . .2121324.6 Medical Air Receivers . . . . . . . . . .2121324.7 Requirements for Medical Air

Receivers . . . . . . . . . . . . . . . . . . .2121325.0 Medical Vacuum Pump System . .2121325.1 General . . . . . . . . . . . . . . . . . . . . .2121325.2 Medical-Surgical Vacuum

Sources . . . . . . . . . . . . . . . . . . . .2121325.3 Exhausts . . . . . . . . . . . . . . . . . . . .2131325.4 Receivers . . . . . . . . . . . . . . . . . . .2131325.5 Piping . . . . . . . . . . . . . . . . . . . . . .2131325.6 Drains . . . . . . . . . . . . . . . . . . . . . .2131326.0 Testing and Inspection . . . . . . . . .2131326.1 Where Required . . . . . . . . . . . . . .2131326.2 Systems . . . . . . . . . . . . . . . . . . . .2141326.3 Advance Notice . . . . . . . . . . . . . .2141326.4 Responsibility . . . . . . . . . . . . . . . .2141326.5 Testing . . . . . . . . . . . . . . . . . . . . .2141326.6 Retesting . . . . . . . . . . . . . . . . . . .2141326.7 Initial Pressure Test – Piped

Gas Systems . . . . . . . . . . . . . . . .2141326.8 Cross-Connection Test – Piped

Gas Systems . . . . . . . . . . . . . . . .214

1326.9 Standing Pressure Test – PipedGas Systems . . . . . . . . . . . . . . . .214

1326.10 Initial Pressure Test – PipedVacuum Systems . . . . . . . . . . . . .215

1326.11 Standing Pressure Test – PipedVacuum Systems . . . . . . . . . . . . .215

1326.12 Corrections . . . . . . . . . . . . . . . . . .2151326.13 Approval . . . . . . . . . . . . . . . . . . . .2151326.14 Covering or Use . . . . . . . . . . . . . .2151326.15 Uncovering . . . . . . . . . . . . . . . . . .2151327.0 System Certification . . . . . . . . . . .2151327.1 Certification . . . . . . . . . . . . . . . . . .2151327.2 Certification Tests . . . . . . . . . . . . .2151327.3 Reports . . . . . . . . . . . . . . . . . . . . .2161327.4 Report Items . . . . . . . . . . . . . . . . .216

CHAPTER 14 REFERENCEDSTANDARDS . . . . . . . . . . . . . . . .217

1401.0 General . . . . . . . . . . . . . . . . . . . . .2171401.1 Standards . . . . . . . . . . . . . . . . . . .217Table 1401.1 Referenced Standards . . . . . . . . .217

CHAPTER 15 FIRESTOP PROTECTION . . . . . .2411501.0 General . . . . . . . . . . . . . . . . . . . . .2411501.1 Applicability . . . . . . . . . . . . . . . . . .2411502.0 Plans and Specifications . . . . . . .2411502.1 Penetrations . . . . . . . . . . . . . . . . .2411503.0 Installation . . . . . . . . . . . . . . . . . .2411503.1 Materials . . . . . . . . . . . . . . . . . . . .2411504.0 Combustible Piping

Installations . . . . . . . . . . . . . . . . . .2411504.1 General Requirements . . . . . . . . .2411504.2 Fire-Resistance Rating . . . . . . . . .2411504.3 Firestop Systems . . . . . . . . . . . . .2411504.4 Connections . . . . . . . . . . . . . . . . .2411504.5 Insulation and Coverings . . . . . . .2411504.6 Sleeves . . . . . . . . . . . . . . . . . . . . .2411505.0 Noncombustible Piping

Installations . . . . . . . . . . . . . . . . . .2411505.1 General Requirements . . . . . . . . .2411505.2 Fire-Resistance Rating . . . . . . . . .2411505.3 Firestop Systems . . . . . . . . . . . . .2411505.4 Connections . . . . . . . . . . . . . . . . .2421505.5 Unshielded Couplings . . . . . . . . . .2421505.6 Sleeves . . . . . . . . . . . . . . . . . . . . .2421505.7 Insulation and Coverings . . . . . . .2421506.0 Required Inspection . . . . . . . . . . .2421506.1 General . . . . . . . . . . . . . . . . . . . . .2421506.2 Examination . . . . . . . . . . . . . . . . .242

xxiv UNIFORM PLUMBING CODE



1506.3 Penetrations . . . . . . . . . . . . . . . . .2421506.4 Field Installations . . . . . . . . . . . . .242

CHAPTER 16 ALTERNATE WATERSOURCES FORNONPOTABLEAPPLICATIONS . . . . . . . . . . . . . .243

1601.0 General . . . . . . . . . . . . . . . . . . . . .2431601.1 Applicability . . . . . . . . . . . . . . . . . .2431601.2 System Design . . . . . . . . . . . . . . .2431601.3 Permit . . . . . . . . . . . . . . . . . . . . . .2431601.4 Component Identification . . . . . . .2431601.5 Maintenance and Inspection . . . .2431601.6 Operation and Maintenance

Manual . . . . . . . . . . . . . . . . . . . . .2431601.7 Minimum Water Quality

Requirements . . . . . . . . . . . . . . . .243Table 1601.5 Minimum Alternate Water

Source Testing, Inspection,and Maintenance Frequency . . . .244

1601.8 Material Compatibility . . . . . . . . . .2441601.9 System Controls . . . . . . . . . . . . . .2441602.0 Gray Water Systems . . . . . . . . . .2441602.1 General . . . . . . . . . . . . . . . . . . . . .2441602.2 System Requirements . . . . . . . . .2441602.3 Connections to Potable and

Reclaimed (Recycled) WaterSystems . . . . . . . . . . . . . . . . . . . .245

1602.4 Location . . . . . . . . . . . . . . . . . . . .245Table 1602.4 Location of Gray Water System . .2451602.5 Plot Plan Submission . . . . . . . . . .2451602.6 Prohibited Location . . . . . . . . . . . .2451602.7 Drawings and Specifications . . . .2451602.8 Procedure for Estimating

Gray Water Discharge . . . . . . . . .2461602.9 Gray Water System

Components . . . . . . . . . . . . . . . . .2461602.10 Subsurface Irrigation

System Zones . . . . . . . . . . . . . . . .247Table 1602.10 Design of Six Typical Soils . . . . . .2471602.11 Subsurface and Subsoil

Irrigation Field, and MulchBasin Design and Construction . .247

Table 1602.11 Subsurface Irrigation DesignCriteria for Six Typical Soils . . . . .247

Table 1602.11.3 Subsoil Irrigation FieldConstruction . . . . . . . . . . . . . . . . .248

1602.12 Gray Water System Color and MarkingInformation . . . . . . . . . . . . . . . . . .248

1602.13 Other Collection andDistribution Systems . . . . . . . . . . .248

1602.14 Testing . . . . . . . . . . . . . . . . . . . . .2491602.15 Maintenance . . . . . . . . . . . . . . . . .2491603.0 Reclaimed (Recycled) Water

Systems . . . . . . . . . . . . . . . . . . . .2491603.1 General . . . . . . . . . . . . . . . . . . . . .2491603.2 Permit . . . . . . . . . . . . . . . . . . . . . .2491603.3 System Changes . . . . . . . . . . . . .2491603.4 Connections to Potable or

Reclaimed (Recycled)Water Systems . . . . . . . . . . . . . . .249

1603.5 Initial Cross-Connection Test . . . .2491603.6 Reclaimed (Recycled) Water

System Materials . . . . . . . . . . . . .2491603.7 Reclaimed (Recycled) Water

System Color and MarkingInformation . . . . . . . . . . . . . . . . . .249

1603.8 Valves . . . . . . . . . . . . . . . . . . . . . .2491603.9 Installation . . . . . . . . . . . . . . . . . .2491603.10 Signs . . . . . . . . . . . . . . . . . . . . . . .2501603.11 Inspection and Testing . . . . . . . . .2501603.12 Sizing . . . . . . . . . . . . . . . . . . . . . .2511604.0 On-Site Treated Nonpotable

Water Systems . . . . . . . . . . . . . . .2511604.1 General . . . . . . . . . . . . . . . . . . . . .2511604.2 Plumbing Plan Submission . . . . . .2511604.3 System Changes . . . . . . . . . . . . .2511604.4 Connections to Potable or

Reclaimed (Recycled) WaterSystems . . . . . . . . . . . . . . . . . . . .251

1604.5 Initial Cross-Connection Test . . . .2511604.6 On-Site Treated Nonpotable

Water System Materials . . . . . . . .2511604.7 On-Site Treated Nonpotable

Water Devices and Systems . . . .2511604.8 On-Site Treated Nonpotable

Water System Color andMarking Information . . . . . . . . . . .251

1604.9 Valves . . . . . . . . . . . . . . . . . . . . . .2511604.10 Design and Installation . . . . . . . . .2511604.11 Signs . . . . . . . . . . . . . . . . . . . . . . .2521604.12 Inspection and Testing . . . . . . . . .2521604.13 Sizing . . . . . . . . . . . . . . . . . . . . . .253

CHAPTER 17 NONPOTABLE RAINWATERCATCHMENT SYSTEMS . . . . . . .255

1701.0 General . . . . . . . . . . . . . . . . . . . . .2551701.1 Applicability . . . . . . . . . . . . . . . . . .2551702.0 Nonpotable Rainwater

Catchment Systems . . . . . . . . . . .2551702.1 General . . . . . . . . . . . . . . . . . . . . .255

xxvUNIFORM PLUMBING CODE



1702.2 Plumbing Plan Submission . . . . . .2551702.3 System Changes . . . . . . . . . . . . .2551702.4 Connections to Potable or

Reclaimed (Recycled)Water Systems . . . . . . . . . . . . . . .255

1702.5 Initial Cross-Connection Test . . . .2551702.6 Sizing . . . . . . . . . . . . . . . . . . . . . .2551702.7 Rainwater Catchment System

Materials . . . . . . . . . . . . . . . . . . . .2551702.8 Rainwater Catchment System

Color and MarkingInformation . . . . . . . . . . . . . . . . . .255

1702.9 Design and Installation . . . . . . . . .2551702.10 Signs . . . . . . . . . . . . . . . . . . . . . . .2571702.11 Inspection and Testing . . . . . . . . .257

APPENDICES TABLE OF CONTENTS . . . . . . . .259Appendix A Recommended Rules for

Sizing the Water SupplySystem . . . . . . . . . . . . . . . . . . . . .261

Appendix B Explanatory Notes onCombination Waste and VentSystems . . . . . . . . . . . . . . . . . . . .271

Appendix C Alternate Plumbing Systems . . . .273Appendix D Sizing Storm Water Drainage

Systems . . . . . . . . . . . . . . . . . . . .281Appendix E Manufactured/Mobile Home

Parks and RecreationalVehicle Parks . . . . . . . . . . . . . . . .289

Appendix F Firefighter Breathing AirReplenishment Systems . . . . . . . .301

Appendix G Sizing of Venting SystemsServing Appliances Equippedwith Draft Hoods, Category IAppliances, and AppliancesListed for Use with Type BVents . . . . . . . . . . . . . . . . . . . . . . .305

Appendix H Private Sewage DisposalSystems . . . . . . . . . . . . . . . . . . . .315

Appendix I Installation Standards . . . . . . . . . .325Appendix J Combination of Indoor and

Outdoor Combustion andVentilation Opening Design . . . . .431

Appendix K Potable Rainwater CatchmentSystems . . . . . . . . . . . . . . . . . . . .433

Appendix L Sustainable Practices . . . . . . . . . .437

USEFUL TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . .451

INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . .459

xxvi UNIFORM PLUMBING CODE



101.0 General.101.1 Title. This document shall be known as the “UniformPlumbing Code,’’ may be cited as such, and will be referredto herein as “this code.’’101.2 Scope. The provisions of this code shall apply to theerection, installation, alteration, repair, relocation, replace-ment, addition to, use, or maintenance of plumbing systemswithin this jurisdiction.101.3 Purpose. This code is an ordinance providing mini-mum requirements and standards for the protection of thepublic health, safety, and welfare.101.4 Conflicts Between Codes. Where the require-ments within the jurisdiction of this plumbing code conflictwith the requirements of the mechanical code, this code shallprevail. In instances where the code, applicable standards, orthe manufacturer’s installation instructions conflict, the morestringent provisions shall prevail. Where there is a conflictbetween a general requirement and a specific requirement,the specific requirement shall prevail.101.5 Plans Required. The Authority Having Jurisdictionshall be permitted to require the submission of plans, speci-fications, drawings, and such other information in accordancewith the Authority Having Jurisdiction, prior to the com-mencement of, and at a time during the progress of, work reg-ulated by this code.

The issuance of a permit upon plans and specificationsshall not prevent the Authority Having Jurisdiction fromthereafter requiring the correction of errors in said plans andspecifications or from preventing construction operationsbeing carried on thereunder where in violation of this code orof other pertinent ordinance or from revoking a certificate ofapproval where issued in error.101.6 Repairs and Alterations. In existing buildings orpremises in which plumbing installations are to be altered,repaired, or renovated, deviations from the provisions of thiscode are permitted, provided such deviations are found to benecessary and are first approved by the Authority HavingJurisdiction.

101.6.1 Building Sewers and Drains. Existingbuilding sewers and building drains shall be permitted tobe used in connection with new buildings or new plumb-ing and drainage work where they are found on exami-nation and test to be in accordance with the requirementsgoverning new work, and the proper Authority HavingJurisdiction shall notify the owner to make changes nec-essary to be in accordance with this code. No building, orpart thereof, shall be erected or placed over a part of adrainage system that is constructed of materials otherthan those approved elsewhere in this code for use underor within a building.

101.6.2 Openings. Openings into a drainage or ventsystem, excepting those openings to which plumbing fix-tures are properly connected or which constitute vent ter-minals, shall be permanently plugged or capped in anapproved manner, using the appropriate materials inaccordance with this code.

101.7 Maintenance. The plumbing and drainage system ofa premises under the Authority Having Jurisdiction shall bemaintained in a sanitary and safe operating condition by theowner or the owner’s agent.101.8 Existing Construction. No provision of this codeshall be deemed to require a change in a portion of a plumb-ing or drainage system or other work regulated by this codein or on an existing building or lot where such work wasinstalled and is maintained in accordance with law in effectprior to the effective date of this code, except where suchplumbing or drainage system or other work regulated by thiscode is determined by the Authority Having Jurisdiction tobe in fact dangerous, unsafe, insanitary, or a nuisance and amenace to life, health, or property.101.9 Additions, Alterations, or Repairs. Additions,alterations, repairs, and replacement of plumbing systemsshall comply with the provisions for new systems except asotherwise provided in Section 101.11.101.10 Appendices. The provisions in the appendices areintended to supplement the requirements of this code andshall not be considered part of this code unless formallyadopted as such.101.11 Application to Existing Plumbing System.Additions, alterations, or repairs shall be permitted to be madeto a plumbing system without requiring the existing plumb-ing system to be in accordance with the requirements of thiscode, provided the addition, alteration, or repair is in accor-dance with that required for a new plumbing system. Addi-tions, alterations, or repairs shall not cause an existing systemto become unsafe, insanitary, or overloaded.

101.11.1 Health and Safety. Where compliance withthe provisions of this code fail to eliminate or alleviate anuisance, or other dangerous or insanitary condition thatinvolves health or safety hazards, the owner or theowner’s agent shall install such additional plumbing anddrainage facilities or shall make such repairs or alter-ations as ordered by the Authority Having Jurisdiction.101.11.2 Existing Installation. Plumbing systemslawfully in existence at the time of the adoption of thiscode shall be permitted to have their use, maintenance, orrepair continued where the use, maintenance, or repair isin accordance with the original design and location andno hazard to life, health, or property has been created bysuch plumbing system.

12012 UNIFORM PLUMBING CODE

CHAPTER 1ADMINISTRATION



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