Plumbing fittings - IAPMOmirobase.iapmo.org/standards/standards/5041.pdfTitle:Plumbing fittings Pagination:37 pages (ix preliminary and 28 text), each dated December 2012 ... D. Green

B125.3-12

Plumbing fittings

Committee Member's Copy Only. Distribution Prohibited.

Legal Notice for Standards

Canadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers representing varied viewpoints and interests to achieve consensus and develop a standard. Although CSA Group administers the process and establishes rules to promote fairness in achieving consensus, it does not independently test, evaluate, or verify the content of standards.

Disclaimer and exclusion of liabilityThis document is provided without any representations, warranties, or conditions of any kind, express or implied, including, without limitation, implied warranties or conditions concerning this document’s fitness for a particular purpose or use, its merchantability, or its non-infringement of any third party’s intellectual property rights. CSA Group does not warrant the accuracy, completeness, or currency of any of the information published in this document. CSA Group makes no representations or warranties regarding this document’s compliance with any applicable statute, rule, or regulation.

IN NO EVENT SHALL CSA GROUP, ITS VOLUNTEERS, MEMBERS, SUBSIDIARIES, OR AFFILIATED COMPANIES, OR THEIR EMPLOYEES, DIRECTORS, OR OFFICERS, BE LIABLE FOR ANY DIRECT, INDIRECT, OR INCIDENTAL DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES, HOWSOEVER CAUSED, INCLUDING BUT NOT LIMITED TO SPECIAL OR CONSEQUENTIAL DAMAGES, LOST REVENUE, BUSINESS INTERRUPTION, LOST OR DAMAGED DATA, OR ANY OTHER COMMERCIAL OR ECONOMIC LOSS, WHETHER BASED IN CONTRACT, TORT (INCLUDING NEGLIGENCE), OR ANY OTHER THEORY OF LIABILITY, ARISING OUT OF OR RESULTING FROM ACCESS TO OR POSSESSION OR USE OF THIS DOCUMENT, EVEN IF CSA GROUP HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, INJURY, LOSS, COSTS, OR EXPENSES.

In publishing and making this document available, CSA Group is not undertaking to render professional or other services for or on behalf of any person or entity or to perform any duty owed by any person or entity to another person or entity. The information in this document is directed to those who have the appropriate degree of experience to use and apply its contents, and CSA Group accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained in this document.

CSA Group is a private not-for-profit company that publishes voluntary standards and related documents. CSA Group has no power, nor does it undertake, to enforce compliance with the contents of the standards or other documents it publishes.

Intellectual property rights and ownershipAs between CSA Group and the users of this document (whether it be in printed or electronic form), CSA Group is the owner, or the authorized licensee, of all works contained herein that are protected by copyright, all trade-marks (except as otherwise noted to the contrary), and all inventions and trade secrets that may be contained in this document, whether or not such inventions and trade secrets are protected by patents and applications for patents. Without limitation, the unauthorized use, modification, copying, or disclosure of this document may violate laws that protect CSA Group’s and/or others’ intellectual property and may give rise to a right in CSA Group and/or others to seek legal redress for such use, modification, copying, or disclosure. To the extent permitted by licence or by law, CSA Group reserves all intellectual property rights in this document.

Patent rightsAttention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. CSA Group shall not be held responsible for identifying any or all such patent rights. Users of this standard are expressly advised that determination of the validity of any such patent rights is entirely their own responsibility.

Authorized use of this documentThis document is being provided by CSA Group for informational and non-commercial use only. The user of this document is authorized to do only the following:

If this document is in electronic form:

Limited copies of this document in print or paper form may be distributed only to persons who are authorized by CSA Group to have such copies, and only if this Legal Notice appears on each such copy.

In addition, users may not and may not permit others to

If you do not agree with any of the terms and conditions contained in this Legal Notice, you may not load or use this document or make any copies of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.


Standards Update Service

B125.3-12December 2012

Title: Plumbing fittingsPagination: 37 pages (ix preliminary and 28 text), each dated December 2012

To register for e-mail notification about any updates to this publication

• go to shop.csa.ca

• click on CSA Update Service

The List ID that you will need to register for updates to this publication is 2422032.

If you require assistance, please e-mail [email protected] or call 416-747-2233.

Visit CSA Group’s policy on privacy at csagroup.org/legal to find out how we protect your personal information.


http://shop.csa.ca

http://csagroup.org/legal


TMA trade-mark of the Canadian Standards Association, operating as “CSA Group”

Published in December 2012 by CSA GroupA not-for-profit private sector organization

5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 • 416-747-4044

Visit our Online Store at shop.csa.ca

B125.3-12Plumbing fittings


http://shop.csa.ca

100%

ISBN 978-1-77139-021-7

© 2012 CSA Group

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

To purchase standards and related publications, visit our Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044.

CSA Group prints its publications on Rolland Enviro100, which contains 100% recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy.


http://shop.csa.ca

December 2012 iii

Contents

© 2012 CSA Group Plumbing fittings

Technical Committee on Plumbing Fittings vi

Preface ix

1 Scope 1

2 Reference publications 2

3 Definitions and abbreviations 33.1 Definitions 33.2 Abbreviations 5

4 Design requirements 54.1 Rated pressure 54.2 Rated temperatures 54.3 Seating members 54.4 Servicing 54.5 Solder joints 64.6 Threads 64.7 Flared and ball sleeve (compression) tube fittings 64.8 Accessible designs 64.9 Flushometer valves 64.10 Temperature-actuated mixing valves 64.11 Backflow prevention 64.12 Automatic compensating valves and temperature-limiting devices 64.12.1 Automatic compensating valves 64.12.2 Automatic temperature-limiting devices 64.13 Cover plates and escutcheons 74.14 Materials 74.15 Toxicity and lead content 74.16 Trap primers 74.17 Fittings incorporating electrical features 74.18 Dimensions 84.18.1 Anti-siphon fill valves 84.19 Cross-flow 84.20 Push-fit fittings 8

5 Performance requirements and test procedures 85.1 General 85.1.1 Preconditioning 85.1.2 Installation for testing 85.2 Coatings 85.3 Pressure and temperature 85.3.1 Static and dynamic seals 85.3.2 Burst pressure 85.3.3 Cross-flow check valves 95.4 Flow rate 95.4.1 Supply fittings 95.4.2 Flushometer valves 95.4.3 Anti-siphon fill valves 95.4.4 Non-hold-open flushometer valves for use with low-consumption or water closets 9


B125.3-12 © 2012 CSA Group

iv December 2012

5.4.5 Thermal expansion relief valves 105.4.6 Trap primers 105.5 Resistance to installation loading and use loading 115.6 Operating requirements 115.6.1 Manually operated valves or operating controls 115.6.2 Performance requirement 115.6.3 Accessible design devices 115.6.4 Flushometer valves and stops 115.7 Automatic compensating valves 115.7.1 Performance criteria 115.7.2 Set-up 115.7.3 Test procedure for pressure-balancing compensating valves 125.7.4 Test procedure for thermostatic compensating valves 125.7.5 Procedure for the supply line pressure-loss test 125.7.6 Automatic temperature-limiting devices 135.8 Life cycle 145.8.1 General 145.8.2 Trap primers 155.8.3 Flushometer valves 155.8.4 Anti-siphon fill valves 155.8.5 Automatic compensating valves 165.8.6 Thermal expansion relief valves 165.8.7 Supply line stops 175.9 Backflow prevention 175.9.1 General 175.9.2 Back siphonage test for anti-siphon fill valves 175.9.3 Trap primers 19

6 Markings, packaging, and installation instructions 196.1 General 196.2 Anti-siphon fill valves 196.3 Flushometer valves 206.4 Thermal expansion relief valves 206.5 Temperature identification 206.6 Packaging 206.7 Installation instructions 206.7.1 Trap primers 206.7.2 Automatic compensating valves 206.7.3 Anti-siphon fill valves 206.7.4 Flushometer valves 206.8 Flow rate for automatic temperature-limiting devices 21

AnnexesA (informative) — Unit conversion and rounding criteria 28

Tables1 — Operating requirements 212 — Minimum flow rates for supply fittings 213 — Allowable variations in discharge temperature for thermostatic compensating valves 224 — Life cycle test cycles 22



December 2012 v

Figures1 — Typical trap primer 232 — Shank for anti-siphon fill valve 233 — Test assembly for determining valve opening pressure for thermal expansion relief valves 244 — Set-up for life cycle test for automatic compensating valves 245 — Anti-siphon fill valve test assembly 256 — Location of critical level for anti-siphon fill valves 267 — Set-up for back siphonage test for trap primers 27


B125.3-12 © 2012 CSA Group

vi December 2012

Technical Committee on Plumbing Fittings

K. Ernst Oakville Stamping & Bending Limited, Oakville, Ontario

Chair

B. Lagueux Saint-Nicolas, Québec Vice-Chair

W. Ball Woodford Manufacturing Company,Colorado Springs, Colorado, USA

Associate

J. Bertrand Moen Incorporated,North Olmsted, Ohio, USA

R. Bratsch-Blundel George Brown College, Toronto, Ontario

S. Breda Breda & Assoc. Ltd.,Downsview, Ontario

M. Campos International Code Council,Whittier, California, USA

Associate

S. Cavanaugh Cavanaugh Consulting,Santa Fe, New Mexico, USA

I. Chang Intertek Testing Services NA Ltd., Coquitlam, British Columbia

Associate

W. Chapin Reliance Worldwide,Cullman, Alabama, USA

Associate

R. Chauhan Ottawa, Ontario

G. Darnowski Watts Water Technologies (Canada) Inc.,Burlington, Ontario

Associate

M. Dennis Moen Incorporated,Oakville, Ontario

N. Dickey CSA Group, Independence, Ohio, USA

Associate

J. Drumm City of Peterborough,Peterborough, Ontario

Y. Duchesne Régie du bâtiment du Québec,Québec, Québec

T. Eberhardy Bradley Corporation, Menomonee Falls, Wisconsin, USA

Associate



December 2012 vii

W. Falcomer The Corporation of the City of Ottawa,Ottawa, Ontario

D. Green National Research Council Canada,Ottawa, Ontario

Associate

L. Himmelblau Chicago Faucets Geberit Manufacturing Division,Des Plaines, Illinois, USA

E. Ho IAPMO Research & Testing Inc., Markham, Ontario

Associate

K. Hui Ontario Ministry of Municipal Affairs and Housing,Toronto, Ontario

A. Knapp A. Knapp & Associates, Toronto, Ontario

J. Knapton SAIT Polytechnic School of Construction,Calgary, Alberta

N. Kummerlen Lorain, Ohio, USA

F. Lemieux Health Canada, Ottawa, Ontario

M. Malatesta American Standard Brands, d/b/a AS America, Inc., Piscataway, New Jersey, USA

Associate

D. Marbry Fluidmaster Inc., San Juan Capistrano, California, USA

Associate

S. Martin International Code Council, Pittsburgh, Pennsylvania, USA

Associate

D. McNamara Franke Kindred Canada Limited, Midland, Ontario

Associate

S. O’Neill Mohawk College of Applied Arts and Technology, Stoney Creek, Ontario

D. Orton NSF International, Ann Arbor, Michigan, USA

Associate

P. Paré Masco Canada Limited, St. Thomas, Ontario

Associate

S. Rawalpindiwala Kohler Co. Plumbing Division,Kohler, Wisconsin, USA

S. Remedios Remedios Consulting LLC,Noblesville, Indiana, USA

P. Saeed Powers, a Division of Watts Water Technologies, Inc., Buffalo Grove, Illinois, USA


B125.3-12 © 2012 CSA Group

viii December 2012

T. Stessman Kohler Co. Plumbing Division, Kohler, Wisconsin, USA

Associate

C. Trendelman Delta Faucet Company,Indianapolis, Indiana, USA

Associate

C. Wright Ontario Pipe Trades, Dundalk, Ontario

L. Pilla CSA Group, Mississauga, Ontario

Project Manager



December 2012 ix

Preface

This is the third edition of CSA B125.3, Plumbing fittings. It supersedes the previous editions, published in 2011 and 2005.

Together with ASME A112.18.1/CSA B125.1, Plumbing supply fittings, ASME A112.18.2/CSA B125.2, Plumbing waste fittings, and ASME A112.18.6/CSA B125.6, Flexible water connectors, this Standard forms a series to cover plumbing fittings.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was prepared by the Technical Committee on Plumbing Fittings, under the jurisdiction of the Strategic Steering Committee on Water Management Products, Materials, and Systems, and has been formally approved by the Technical Committee.

Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains

the responsibility of the users of the Standard to judge its suitability for their particular purpose.(3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of

good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

(4) To submit a request for interpretation of this Standard, please send the following information to [email protected] and include “Request for interpretation” in the subject line:(a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition; and(c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing

standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.(5) This Standard is subject to periodic review, and suggestions for its improvement will be referred to the appropriate

committee. To submit a proposal for change, please send the following information to [email protected] and include “Proposal for change” in the subject line:(a) Standard designation (number);(b) relevant clause, table, and/or figure number;(c) wording of the proposed change; and(d) rationale for the change.


http://standardsactivities.csa.ca



December 2012 1

B125.3-12Plumbing fittings

1 Scope

1.1This Standard covers plumbing fittings, including the following:(a) anti-siphon fill valves;(b) automatic compensating valves other than those for individual wall-mounted showering systems;(c) flushometer valves and solenoid valves;(d) supply line stops;(e) temperature-actuated in-line mixing valves;(f) thermal expansion relief valves; and(g) trap primers.

1.2This Standard does not cover the following plumbing supply fittings and accessories, which are covered by ASME A112.18.1/CSA B125.1:(a) automatic compensating valves for individual wall-mounted showering systems;(b) bath and shower supply fittings;(c) bidet supply fittings;(d) clothes washer supply fittings;(e) drinking fountain supply fittings;(f) humidifier supply stops;(g) kitchen, sink, and lavatory supply fittings;(h) laundry tub supply fittings;(i) lawn and sediment faucets;(j) metering and self-closing supply fittings; and(k) supply stops.

1.3This Standard does not cover(a) plumbing waste fittings, which are covered by ASME A112.18.2/CSA B125.2;(b) flexible water connectors under continuous pressure, which are covered by ASME A112.18.6/

CSA B125.6; and(c) pipes and tubes or pipe and tube fittings.

1.4In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.


B125.3-12 © 2012 CSA Group

2 December 2012

1.5SI units are the units of record in Canada. In this Standard, the inch/pound units are shown in parentheses.

The values stated in each measurement system are equivalent in application; however, each system is to be used independently. Combining values from the two measurement systems can result in non-conformance with this Standard.

All references to gallons are to U.S. gallons.For information on the conversion criteria used in this Standard, see Annex A.

2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.

ASME/CSA Group (The American Society of Mechanical Engineers)ASME A112.18.1-2012/CSA B125.1-12Plumbing supply fittings

ASME A112.18.2-2011/CSA B125.2-11Plumbing waste fittings

ASME A112.18.6-2009/CSA B125.6-09Flexible water connectors

ASME A112.19.2-2008/CSA-B45.1-08Ceramic plumbing textures

ASSE/ASME/CSA Group (American Society of Sanitary Engineering/The American Society of Mechanical Engineers)ASSE 1016-2011/ASME A112.1016-2011/CSA B125.16-11Performance requirements for automatic compensating valves for individual showers and tub/shower combinations

ASME (The American Society of Mechanical Engineers)A112.1.2-2004Air Gaps in Plumbing Systems (for Plumbing Fixtures and Water-Connected Receptors)

A112.18.3-2002 (R2008)Performance Requirements for Backflow Protection Devices and Systems in Plumbing Fixture Fittings

B1.1-2003 (R2008)Unified Inch Screw Threads, (UN and UNR Thread Form)

B1.20.1-1983 (R2006)Pipe Threads, General Purpose, Inch

B1.20.7-1991 (R2008)Hose Coupling Screw Threads, Inch

B16.18-2001 (R2005)Cast Copper Alloy Solder Joint Pressure Fittings

B16.22-2001 (R2005)Wrought Copper and Copper Alloy Solder Joint Pressure Fittings



December 2012 3

ASSE (American Society of Sanitary Engineering)1017-2003Performance Requirements for Temperature Actuated Mixing Valves for Hot Water Distribution Systems

1061-2006Performance Requirements for Removable & Non-Removable Push-Fit Fittings

ASTM International (American Society for Testing and Materials)E29-08Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

NSF InternationalNSF/ANSI 61-2007aDrinking Water System Components — Health Effects

NSF/ANSI 372-2010 Drinking Water System Components — Lead content

3 Definitions and abbreviations

3.1 DefinitionsThe following definitions shall apply in this Standard:

Accessible — readily serviceable or readily replaceable.

Accessible design — a design approach for making devices accessible to persons with physical, sensory, or cognitive disabilities.Note: Accessible designs were formerly called barrier-free designs.

Accessory — a component that can, at the discretion of the user, be readily added, removed, or replaced and that, when removed, will not prevent the fitting from fulfilling its primary function.Note: Examples include aerators, hand-held shower assemblies, shower heads, and in-line flow controls.

Air gap — the unobstructed vertical distance, through air, between the lowest point of a water supply outlet and the mounting deck of the fitting.

Automatic temperature-limiting device — a device with a means to automatically limit the temperature of the water.Note: Automatic temperature-limiting devices reduce the risk of scalding but do not necessarily protect against thermal shock.

Backflow — a flowing back or reversal of the normal direction of flow.Note: Back siphonage and back pressure are types of backflow.

Back siphonage — backflow caused by below-atmospheric pressure in the water system.

Critical level (CL) — the lowest water level in a fitting at which back siphonage will not occur.

Fitting — a device that controls and guides the flow of water.

Commercial fitting — a fitting intended primarily for industrial process, food service, laboratory, and other non-residential applications.

Domestic fitting — a fitting intended primarily for residential installations.

Supply fitting — a fitting that controls and guides the flow of water in a supply system.


B125.3-12 © 2012 CSA Group

4 December 2012

Fixture — a device that receives water or waste matter, or both, and directs these substances into a drainage system.

Outlet —

Primary outlet — the outlet from a supply fitting on the discharge side of a valve through which water will discharge unless diverted to a secondary outlet.

Secondary outlet — an outlet from a supply fitting on the discharge side of a valve, other than the primary outlet, through which water can be discharged.

Submersible outlet — an outlet from a supply fitting on the discharge side of a valve, which can be immersed in non-potable waterNote: Fill valves and trap seal primers are examples of submersible outlets.

Pressure —

Flowing pressure — the pressure in the fitting supply piping upstream of an open fitting or accessory.

Supply pressure — the static water pressure in the fitting supply piping.

Push-fit fitting — a mechanical fitting that joins pipes or tubes and achieves a seal by pushing the mating pipe or tube into the fitting by hand. The fitting can be removable or non-removable.

Seal — a component or other portion of a fitting that prevents water leakage.

Shank — a rigid threaded portion of a supply fitting that extends below the mounting surface and has a means for connecting to the supply line.

Standard tools — tools that are normally carried by plumbers for installing and maintaining plumbing.Note: Examples include screwdrivers, key wrenches, flat-jawed wrenches, and pliers.

Supply line stop — a valve used to control the flow or water in a distribution system, except a supply stop.

Supply stop — a valve that is placed immediately upstream of a terminal fitting to shut off the water supply to the terminal fitting so that it can be serviced or replaced.

Trap primer — a device that supplies water to infrequently used floor-drain traps and thereby prevents sewer gas from entering the premises by replacing water lost to evaporation.

Valve — a fitting with a movable part that regulates the flow of water through one or more passages.

Anti-siphon fill valve — a valve that is used to supply water to a flush tank and has, on its discharge side, an air gap, integral mechanical backflow preventer, or vacuum breaker. It is operated by a float or similar device.

Automatic compensating valve — a water-mixing valve that is supplied with hot and cold water and that provides a means of automatically maintaining the water temperature selected for an outlet.Note: Automatic compensating valves are used to reduce the risk of scalding and thermal shock.

Flushometer valve — a valve that is attached to a pressurized water supply pipe that, when actuated, opens the pipe for direct flow of water into the fixture at a rate and in a quantity that enables proper operation of the fixture. The valve then gradually closes to provide trap reseal in the fixture and avoid water hammer.

Temperature-actuated mixing valve — a device that is installed at the hot water source and used to control water temperature in hot water systems.



December 2012 5

Thermal expansion relief (TER) valve — a device that releases the built-up pressure in a plumbing system (commonly caused by water temperature variations) by safely discharging water into the drainage system when the pressure exceeds a pre-set limit.

3.2 AbbreviationsThe following abbreviations shall apply in this Standard:

CL — critical levelID — inside diameterNPS — Nominal Pipe SizeNPSM — National Pipe Straight MechanicalNS — special thread of American National FormTER — thermal expansion reliefVOP — valve opening pressure

4 Design requirements

4.1 Rated pressure

4.1.1Plumbing fittings shall be designed for a rated supply pressure of 690 kPa (100 psi).

4.1.2Plumbing fittings shall be designed to function at a supply pressure between 140 and 860 kPa (20 and 125 psi). In addition, flushometer valves shall comply with Clause 5.4.1.

4.2 Rated temperaturesPlumbing fittings shall be designed for rated supply temperatures from 5 to 71 °C (40 to 160°F).

4.3 Seating members

4.3.1Fill valves shall have replaceable seats unless the seat material is known to be highly resistant to wire drawing and similar damage.

4.3.2Seat disc arrangements shall be replaceable.

4.3.3Seat disc arrangements shall not vibrate in service. When a threaded device is used to secure the disc, the threaded device shall remain secure after the disc has been removed and replaced five times.

4.4 ServicingFittings shall be designed so that replacement of wearing parts can be accomplished(a) without removing the fitting from the supply system;(b) without removing the piping from the body;(c) without disturbing the finished wall; and(d) using standard tools or manufacturer-provided tools.


B125.3-12 © 2012 CSA Group

6 December 2012

4.5 Solder jointsThe dimensions of solder joint ends for connection to copper tubes or fittings (other than factory-assembled parts) shall comply with ASME B16.18 or ASME B16.22, as applicable.

4.6 ThreadsPipe threads shall comply with ASME B1.20.1 and hose threads shall comply with ASME B1.20.7.

4.7 Flared and ball sleeve (compression) tube fittingsThe screw thread dimensions of flared and ball sleeve (compression) tube fittings shall comply with ASME B1.1.

4.8 Accessible designsOperating controls intended for use in accessible designs shall(a) be automatically controlled; or(b) meet the following requirements:

(i) be operable with one hand;(ii) not require tight grasping, pinching, or twisting of the wrist; and(iii) require an operating force not greater than the applicable value specified in Table 1.

4.9 Flushometer valvesThe pipe sizes and inlet connections for flushometer valves shall be specified by the manufacturer.

4.10 Temperature-actuated mixing valvesTemperature-actuated mixing valves shall comply with the performance requirements of ASSE 1017.

4.11 Backflow preventionFittings shall be designed to protect the potable water supply from contamination due to backflow by a means that complies with the applicable requirements of Clause 5.9.

Diverting and anti-siphoning devices incorporated into a fitting shall be removable for cleaning, repair, and replacement.

4.12 Automatic compensating valves and temperature-limiting devices

4.12.1 Automatic compensating valvesAutomatic compensating valves (other than those for individual wall-mounted showering systems, which are covered in ASME A112.18.1/CSA B125.1 by ASSE 1016/ASME A112.1016/CSA B125.16) shall be equipped with a means that limits (sets) the maximum temperature of the valve and shall comply with this Standard.

4.12.2 Automatic temperature-limiting devicesNote: Automatic temperature-limiting devices are intended to reduce the risk of scalding and are not intended to protect against thermal shock. These devices can be separate from or integral with plumbing supply fittings.

4.12.2.1In addition to the requirements specified in Clauses 4.12.2.2, 4.12.2.3, and 5.7.6, automatic temperature limiting devices shall comply with all other applicable requirements of this Standard.

4.12.2.2Automatic temperature-limiting devices shall be provided with a(a) fixed (non-adjustable) temperature setting; or(b) temperature setting that can be



December 2012 7

(i) adjusted and locked in position; or(ii) protected, by use of a tool, against user access.

4.12.2.3Automatic temperature-limiting devices shall be provided with check valves or other means of preventing cross-flow that comply with Clause 5.3.3.

4.13 Cover plates and escutcheonsCover plates and escutcheons for concealed and deck-mounted supply fittings shall have dimensions that allow them to conceal a circular area with a diameter of not less than 44 mm (1.73 in).

4.14 MaterialsCoupling nuts and locknuts shall be made from(a) copper alloys with 56% minimum copper content;(b) stainless steel alloys of the 300 or 400 series;(c) plastics; or(d) materials that comply with Clause 5.11 of ASME A112.18.1/CSA B125.1.

4.15 Toxicity and lead content

4.15.1Fittings covered by this Standard shall comply with the applicable requirements of NSF/ANSI 61.

4.15.2Solders and fluxes in contact with potable water shall not exceed, by mass, 0.2% lead content. Metal alloys in contact with potable water shall not exceed 8% lead content.

4.15.3Fittings intended to convey or dispense water for human consumption through drinking or cooking shall not contain a weighted average lead content in excess of 0.25% when evaluated in accordance with the test method in NSF/ANSI 372.

4.16 Trap primers

4.16.1Trap primers should activate between 140 kPa and 860 kPa (20 psi and 125 psi).

4.16.2Connections leading into and out of a trap primer shall be at least NPS-1/2.

4.16.3In response to flow or pressure changes in the supply line, a trap primer shall provide intermittent discharge of water through its secondary outlet to a trap. See Figure 1.

4.16.4A trap primer shall prevent back siphonage through its secondary outlet in accordance with Clause 5.9.3.

4.17 Fittings incorporating electrical featuresElectrical power to fittings incorporating electric features shall be supplied in accordance with Clause 4.13 of ASME A112.18.1/CSA B125.1.


B125.3-12 © 2012 CSA Group

8 December 2012

4.18 Dimensions

4.18.1 Anti-siphon fill valves

4.18.1.1 DimensionsThe dimensions of the shank on a anti-siphon fill valve shall be as shown in Figure 2.

4.18.1.2 Bowl refill tubeThe bowl refill tube, when supplied, shall be sufficiently rigid to maintain its installed position. If a clamping device is used, it shall not obstruct a cross-sectional area of the tank overflow tube of more than 20 mm2 (0.031 in2).

4.19 Cross-flowFittings that have integral flow control devices downstream of the primary shut-off valves that completely shut off the flow of water shall have check valves installed in the fitting to prevent cross-flow. These check valves shall comply with Clause 5.3.3.

4.20 Push-fit fittingsConnections achieved by push-fit fittings shall comply with ASSE 1061.

5 Performance requirements and test procedures

5.1 General

5.1.1 PreconditioningBefore testing, specimens shall be conditioned at ambient laboratory conditions for at least 12 h.

5.1.2 Installation for testingFor test purposes, specimens shall be installed in accordance with the manufacturer’s instructions.

5.2 CoatingsCoatings shall comply with Clause 5.2 of ASME A112.18.1/CSA B125.1 when tested in accordance with Clause 5.2 of ASME A112.18.1/CSA B125.1.

5.3 Pressure and temperature

5.3.1 Static and dynamic seals

5.3.1.1 GeneralSeals of plumbing fittings, except those of trap primers, shall comply with Clause 5.3.1.1 of ASME A112.18.1/CSA B125.1 when tested in accordance with Clauses 5.3.1.2 to 5.3.1.4 of ASME A112.18.1/CSA B125.1.

5.3.1.2 Trap primer sealsA trap primer seal shall not leak or otherwise fail when tested with its outlet blocked and in accordance with Items (a) and (b) of Clause 5.3.1.4 of ASME A112.18.1/CSA B125.1.

5.3.2 Burst pressureFittings shall withstand a hydrostatic burst pressure test, as specified in Clauses 5.3.2.2 and 5.3.2.3 of ASME A112.18.1/CSA B125.1, without permanent distortion or failure of the pressure envelope.



December 2012 9

5.3.3 Cross-flow check valvesCross-flow check valves shall not leak more than 35 mL/min (0.01 gpm) out of one supply inlet when the opposite supply inlet is pressurized to 35 kPa (5 psi) with water at 10 ± 6 °C (50 ± 10°F) for 1 min and with the primary shut-off valves open and all outlets blocked. This requirement shall be met before and after the applicable life cycle test specified in Clause 5.8.

5.4 Flow rate

5.4.1 Supply fittingsSupply fittings shall permit water to flow at the rates specified in Table 2 when tested in accordance with the applicable requirements of Clause 5.4 of ASME A112.18.1/CSA B125.1. The flow rate test shall be conducted before and after the life cycle test.

5.4.2 Flushometer valvesFlushometer valves shall complete their cycle at a flowing pressure of 70 ± 7 kPa (10 ± 1 psi).


5.4.3.1 Original equipmentWhen the water closet is equipped with an anti-siphon fill valve as a piece of original equipment, the total flow and refill capacity of the valve shall be sufficient to ensure proper operation of the water closet in accordance with ASME A112.19.2/CSA B45.1. The anti-siphon fill valve shall deliver a flow through the refill flow orifice at the rate required by the water closet manufacturer.

5.4.3.2 RetrofitWhen the water closet is retrofitted with an anti-siphon valve, the valve shall deliver a minimum of 5.7 L/min (1.5 gpm) total flow at 103 kPa (15 psi) flowing pressure when tested in accordance with Clause 5.4.3.3. The anti-siphon fill valve shall deliver a minimum of 20% of the total flow rate through the refill orifice at 103 kPa (15 psi) flowing pressure when operated at full flow and tested in accordance with Clause 5.4.3.3.

5.4.3.3 Test procedureThe specimen shall be installed in a flush tank or container and shall be set to run fully open. The flowing pressure shall be 103 kPa (15 psi) measured at the inlet of the specimen. The total flow rate and refill flow rate shall then be measured.

5.4.4 Non-hold-open flushometer valves for use with low-consumption or water closets

5.4.4.1 Performance requirementsWhen tested in accordance with Clause 5.4.4.2, the average water consumption per cycle (flush) for non-hold-open flushometer valves for use with low-consumption water closets shall not exceed(a) 6 L (1.6 gal) over the specified range of test pressures; and(b) 7.6 L (2.0 gal) at any particular pressure.

5.4.4.2 Test procedureAt each pressure specified in this Clause, the water discharge per cycle from the specimen shall be collected and its volume measured. The test shall be repeated five times at each pressure, and the average water discharge at each pressure shall be calculated. The test pressures shall be 170 ± 14 kPa (25 ± 2 psi) flowing and 240 ± 14, 350 ± 14, and 560 ± 14 kPa (35 ± 2, 50 ± 2, and 80 ± 2 psi) static.


B125.3-12 © 2012 CSA Group

10 December 2012

5.4.5 Thermal expansion relief valves

5.4.5.1 GeneralThermal expansion relief (TER) valves that are integral to supply fittings shall comply with Clause 5.4.5.2.Note: TER valves are not designed to replace existing pressure/temperature relief valves on pressure vessels such as water heaters.

5.4.5.2 Performance requirementsWhen tested in accordance with Clause 5.4.5.4, a TER valve shall permit a minimum average flow of water of 400 mL/min (0.1 gpm).

5.4.5.3 Determination of valve opening pressureThe specimen shall be installed as shown in Figure 3, with all valves closed. The supply valve of the specimen shall be opened and the inlet supply pressure gradually increased with the regulator until a discharge of 5 to 10 mL/min (0.001 to 0.003 gpm) from the specimen is observed. The pressure at which this occurs is the valve opening pressure (VOP).

5.4.5.4 Test procedureThe flow rate test shall be conducted as follows:(a) Close all valves.(b) Open the supply valve.(c) Gradually increase the flowing pressure to 120% of the VOP determined in Clause 5.4.5.3 and hold

for 1 min.(d) Record the rate of discharge.(e) Gradually decrease the supply pressure to 70 kPa (10 psi) less than the VOP.(f) Gradually increase the supply pressure to 35 kPa (5 psi) less than the VOP and hold for 1 min.(g) Repeat Items (a) through (f) five times (for a total of six cycles).(h) Average the flow rate over the six cycles.

5.4.6 Trap primers

5.4.6.1 Performance requirementsWhen determined in accordance with the applicable test procedure in Clause 5.4.6.2.1 or 5.4.6.2.2, a water discharge flow rate less than the manufacturer’s specifications shall result in rejection of the trap primer.

5.4.6.2 Test procedure

5.4.6.2.1 Flow-actuated trap primersThe discharge flow rate test for flow-actuated trap primers shall be conducted as follows:(a) Install the specimen in a water supply system in accordance with the manufacturer’s instructions.(b) Establish water flow through the device at the manufacturer’s minimum required flow rate for

3 ± 0.25 min using water at 10 ± 6 °C (50 ± 10°F).(c) Collect and measure the water discharge at least five times at a flowing pressure of 140 kPa (20 psi)

and at least five times at a flowing pressure of 860 kPa (125 psi).(d) Calculate the average water discharge flow rate.

5.4.6.2.2 Pressure-actuated trap primersThe discharge flow rate test for pressure-actuated trap primers shall be conducted as follows:(a) Install the specimen in a water supply system in accordance with the manufacturer’s instructions.(b) Fluctuate the upstream pressure in accordance with the manufacturer’s specifications, using water at

10 ± 6 °C (50 ± 10°F).



December 2012 11

(c) Collect and measure the water discharge at least five times at a flowing pressure of 140 kPa (20 psi) and at least five times at a flowing pressure of 860 kPa (125 psi).

(d) Calculate the average water discharge flow rate.

5.5 Resistance to installation loading and use loadingFittings shall comply with Clauses 5.7 and 5.8 of ASME A112.18.1/CSA B125.1 when tested in accordance with Clauses 5.7 and 5.8 of ASME A112.18.1/CSA B125.1.

5.6 Operating requirements

5.6.1 Manually operated valves or operating controlsExcept for accessible designs, the torque or force required to open, operate, and close a manually activated valve or operating control shall not exceed the applicable operating torque or linear force specified in Table 1 when tested in accordance with Clause 5.3.1.2 of ASME A112.18.1/CSA B125.1.

5.6.2 Performance requirementWhen closed, valves shall not leak when tested for 5 min.

5.6.3 Accessible design devicesAccessible design devices shall be tested in accordance with Clause 5.5.2 of ASME A112.18.1/ CSA B125.1.

5.6.4 Flushometer valves and stopsFlushometer valves and stops shall comply with the flushing performance requirements specified in ASME A112.19.2/CSA B45.1.

5.7 Automatic compensating valves

5.7.1 Performance criteriaAutomatic compensating valves shall maintain discharge temperatures within the following limits when tested in accordance with Clause 5.7.3 or 5.7.4, as applicable:(a) pressure-balancing type: ±2 °C (±4°F), with 50% pressure fluctuation in the supply lines; and(b) thermostatic type: as specified in Table 3.

5.7.2 Set-upAutomatic compensating valve specimens shall be set up as follows:(a) Connect the specimen to the supply line using the connection method and size for which the valve

was designed.(b) Securely hold the specimen in the position in which it will be installed in the field, in accordance with

the manufacturer’s instructions.(c) Supply hot and cold water to the appropriate specimen inlets.(d) Set the supply line pressures directly upstream of the inlet connections to a flowing pressure of

350 ± 15 kPa (50 ± 2 psi).(e) Set the flow rate of the specimen to 10 L/min (2.6 gpm) or the specimen’s maximum flow rate.(f) Install a fixed orifice device on the outlet to limit the flow of water to 9.5 L/m (2.5 gpm) or the

maximum flow rate of the specimen as specified in Clause 5.4.2.3.2 of ASME A112.18.1/CSA B125.1, whichever is greater.


B125.3-12 © 2012 CSA Group

12 December 2012

5.7.3 Test procedure for pressure-balancing compensating valvesPressure-balancing compensating valves shall be tested as follows:(a) Set up the specimen as specified in Clause 5.7.2.(b) Individually vary the flowing pressures in the cold and hot water supply lines from the original

settings specified in Clause 5.7.2 using the following schedule:(i) flowing pressure reduced 50% below the original value;(ii) flowing pressure returned to the original value;(iii) flowing pressure increased 50% above the original value; and(iv) flowing pressure returned to the original value.

(c) Carry out the pressure changes specified in Item (b) rapidly.(d) Keep the temperature of each water supply constant throughout the test.(e) Measure and record the temperature of the water discharge throughout the test and for 25 ± 5 s after

each of the steps specified in Item (b).

5.7.4 Test procedure for thermostatic compensating valves

5.7.4.1 GeneralThe set-up specified in Clause 5.7.2 shall be used in the tests specified in Clauses 5.7.4.2 and 5.7.4.3, except that the hot water temperature shall be set at 63 ± 3 °C (145 ± 5°F).

The temperature and pressure changes specified in Clauses 5.7.4.2 and 5.7.4.3 shall be carried out rapidly and, except for the independent variable in each case, all conditions shall be kept constant.

The temperature of the water discharge shall be measured and recorded throughout the tests and for 25 ± 5 s after the steps specified in Items (a) to (c) of Clause 5.7.4.2.

5.7.4.2 PressuresThe cold and hot water supply line pressures shall be individually varied from the original settings specified in Clauses 5.7.2 and 5.7.4.1 using the following schedule:(a) flowing pressure reduced 20% below the original value;(b) flowing pressure returned to the original value;(c) flowing pressure increased 20% above the original value; and(d) flowing pressure returned to the original value.

5.7.4.3 TemperaturesThe hot water supply line temperatures shall be individually varied from the original settings specified in Clauses 5.7.2 and 5.7.4.1 using the following schedule:(a) temperature reduced 15 °C (27°F) below the original value;(b) temperature returned to the original value; and(c) temperature increased 15 °C (27°F) above the original value.

5.7.5 Procedure for the supply line pressure-loss test

5.7.5.1 Set-upThe set-up specified in Clause 5.7.2 shall be used in the supply line pressure-loss test. The cold-water supply line shall be equipped with a quick closing shut-off valve directly upstream of the specimen.

5.7.5.2 Performance requirementsAutomatic compensating valves shall reduce the discharge flow rate to 2 L/min (0.5 gpm) or less within 5 s after the cold water supply line has been closed in accordance with Clause 5.7.5.3. During this 5 s period, the water temperature at the outlet of the automatic compensating valve shall not exceed 49 °C (120°F) before the discharge flow rate is reduced to 2 L/min (0.5 gpm) or less.



December 2012 13

5.7.5.3 Test procedureWith the specimen producing tempered water at 38 ± 1 °C (100 ± 2°F), the cold water supply line shall be closed within 1 s. The discharge flow rate shall be determined 5 s after the cold water supply line is closed. The outlet temperature shall be recorded until the flow rate is reduced to 2 L/m (0.5 gpm).

5.7.6 Automatic temperature-limiting devices

5.7.6.1 GeneralAutomatic temperature-limiting devices shall comply with Clauses 5.7.6.2 to 5.7.6.6. The tests specified in Clauses 5.7.6.2 to 5.7.6.6 shall be conducted in the order in which they appear in this Standard.

5.7.6.2 Outlet temperatureAutomatic temperature-limiting devices shall limit the water temperature at the outlet to 49 °C (120°F), or less if specified by the manufacturer, when tested in accordance with Clauses 5.7.6.5 and 5.7.6.6.

5.7.6.3 Flow rateThe flow rate for integral automatic temperature-limiting devices shall comply with the ASME A112.18.1/ CSA B125.1 flow rate requirements for the supply fitting to which they are integral.

The flow rate test specified in Clause 5.4 shall be conducted before and after conducting the life cycle test specified in Clause 5.7.6.5.Note: Failure of the test specified in Clause 5.7.6.6.4.2 can necessitate re-evaluation and correction of the manufacturer’s published minimum flow rate.

5.7.6.4 High-temperature conditioning testAutomatic temperature-limiting devices shall continue to comply with Clauses 5.7.6.5 and 5.7.6.6 after being subjected to the high-temperature conditioning test specified in Section 4.2.2 of ASSE 1016/ASME A112.1016/CSA B125.16.

5.7.6.5 Life cycle test

5.7.6.5.1 Performance requirementsAfter undergoing the life cycle test specified in Clause 5.7.6.5.2, automatic temperature-limiting devices shall not leak and shall continue to comply with Clauses 5.7.6.2 to 5.7.6.4 and 5.7.6.6.

5.7.6.5.2 Test set-up and procedureThe specimen shall be set up in accordance with Items (a) to (c) of Clause 5.8.5.2 and then subjected to 100 000 cycles of the sequence specified in Clause 5.8.5.2(e).

5.7.6.6 Temperature limit and supply line pressure-loss tests

5.7.6.6.1 Minimum flow rateThe minimum flow rate specified by the manufacturer shall be the rate at which the device complies with the temperature-limiting requirements of Clause 5.7.6.6 at a flowing pressure of 310 ± 7 kPa (45 ± 1 psi).

5.7.6.6.2 Test preparation procedureFor the tests specified in Clauses 5.7.6.6.3 and 5.7.6.6.4, the specimen shall be set up for data gathering and testing in accordance with Sections 4.6.2 and 4.6.3 of ASSE 1016/ASME A112.1016/CSA B125.16, with the following exceptions:(a) For automatic temperature-limiting devices integral with a supply fitting that meets the maximum

flow rate requirements of ASME A112.18.1/CSA B125.1:(i) Section 4.6.3(e) of ASSE 1016/ASME A112.1016/CSA B125.16 shall be replaced with the

following: Fully open Valve V3 or remove Valve V3 so that the specimen is tested with its intended flow-control device(s) attached; and


B125.3-12 © 2012 CSA Group

14 December 2012

(ii) the 914 ± 13 mm (36 ± 0.5 in) dimension to Sensor T3 in Figure 1 of ASSE 1016/ASME A112.1016/ CSA B125.16 shall be disregarded. Sensor T3 shall be positioned within 25 mm (1.0 in) of the discharge outlet to the fixture in the flow stream. For specimens with multiple discharges, the test shall be conducted for each discharge outlet except for the rim flush mode of bidet fittings.

(b) For all other automatic temperature-limiting devices:(i) Section 4.6.3(e) of ASSE 1016/ASME A112.1016/CSA B125.16 shall be replaced with the

following: Adjust Valve V3 so that the specimen delivers the minimum flow rate +10%, –0% at which the device complies with the temperature-limiting requirements of Clauses 5.7.6.6.3 and 5.7.6.6.4 as well as those specified in the manufacturer’s literature; and

(ii) the 914 ± 13 mm (36 ± 0.5 in) dimension to Sensor T3 in Figure 1 of ASSE 1016/ASME A112.1016/CSA B125.16 shall be disregarded. The maximum distance shall be 457 mm (18 in) from the outlet of the specimen.

5.7.6.6.3 Supply line pressure-loss test

5.7.6.6.3.1 Performance requirementsAutomatic temperature-limiting devices shall reduce the discharge flow rate to 0.76 L/min (0.2 gpm) or to 20% of the manufacturer’s published minimum flow rate, whichever is greater, within 5 s after the cold water supply line has been closed. During this 5 s period, the water temperature at the outlet of the automatic temperature-limiting device shall not exceed 49 °C (120°F) or the temperature specified by the manufacturer, whichever is lower, before the discharge flow rate is reduced to 0.76 L/min (0.2 gpm) or to 20% of the manufacturer’s published minimum flow rate, whichever is greater.Note: Failure of this test can necessitate re-evaluation and correction of the manufacturer’s published minimum flow rate.

5.7.6.6.3.2 Test set-up and procedureAfter the specimen is set up in accordance with Clause 5.7.6.6.2, Valve V2 shall be closed (closing shall take not more than 1 s to complete). The temperature at Sensor T3 and the flow rate shall be recorded for at least 5 s after Shut-off Valve V2 is fully closed (see Figure 1 of ASSE 1016/ASME A112.1016/CSA B125.16).

5.7.6.6.4 Temperature limit test

5.7.6.6.4.1 Performance requirementsWhen tested in accordance with Clause 5.7.6.6.4.2, the water temperature at the outlet of automatic temperature-limiting devices shall not exceed 49 °C (120°F) or the temperature specified by the manufacturer, whichever is lower.

Within the initial 5 s following a temperature change at the outlet of the automatic temperature-limiting device, positive temperature spikes shall not exceed +3.0 °C (+5.4°F) for more than 1.5 s (see Figures B.1 and B.3 of ASSE 1016/ASME A112.1016/CSA B125.16). There shall be no limit on the negative temperature spikes.

5.7.6.6.4.2 Test set-up and procedureAfter the specimen is set up in accordance with Clause 5.7.6.6.2, it shall be tested in accordance with Section 4.6.5 of ASSE 1016/ASME A112.1016/CSA B125.16.

5.8 Life cycle

5.8.1 General

5.8.1.1Fittings incorporating moving parts or parts potentially subject to wear shall be tested(a) in accordance with Clause 5.6.2 of ASME A112.18.1/CSA B125.1 or, for automatic compensating



December 2012 15

valves, Section 4.5 of ASSE 1016/ASME A112.1016/CSA B125.16, for the applicable number of cycles specified in Table 4; or

(b) in accordance with the appropriate requirements of Clauses 5.8.2 to 5.8.7.

5.8.1.2Specimens shall be installed in accordance with the manufacturer’s instructions.

During and after the test, specimens shall continue to function as at the beginning of the test and shall not develop defects that might adversely affect functionality, serviceability, or appearance.

5.8.1.3Valves shall open, operate, and close with a torque or force that does not exceed 120% of the applicable torque or force specified in Table 1, except for accessible design valves, which shall not exceed the applicable force requirements specified in Table 1 when tested in accordance with Clause 5.6.3.

The packing nut may be tightened once during the life cycle test to stop leakage along the stem.

5.8.2 Trap primers

5.8.2.1 Performance requirementsThe water discharge through the secondary outlet of a trap primer shall be the same at the beginning and at the end of the test specified in Clause 5.8.2.2. Failure or leakage during the test shall result in rejection of the specimen.

5.8.2.2 Test procedureThe life cycle test for trap primers shall be conducted as follows:(a) Install the specimen in a water supply system in accordance with the manufacturer’s instructions.(b) Establish water flow through the specimen at the manufacturer’s minimum required flow rate, using

water at 10 ± 6 °C (50 ± 10°F).(c) Fluctuate the flow rate or the upstream flowing pressure, as applicable, for the number of cycles

specified in Table 4.

5.8.3 Flushometer valves

5.8.3.1 Performance requirementsAfter being tested in accordance with Clause 5.8.3.2, flushometer valves shall continue to comply with Clauses 5.4.4.1 and 5.6.4.

5.8.3.2 Test procedureThe specimen shall be operated for the number of cycles specified in Table 4. The cycling speed shall be selected so that the specimen can complete its normal cycle. The test shall be conducted with water at 10 ± 6 °C (50 ± 10°F), at a flowing pressure of 170 kPa (25 psi).


5.8.4.1 Performance requirementsAfter being tested in accordance with Clause 5.8.4.2, anti-siphon fill valves shall continue to function as they did before the life cycle test and shall show no signs of leakage.

5.8.4.2 Test procedureThe specimen shall be operated to the full open position and allowed to return to its closed position for the number of cycles specified in Table 4 with water at 10 ± 6 °C (50 ± 10°F).


B125.3-12 © 2012 CSA Group

16 December 2012

5.8.5 Automatic compensating valves

5.8.5.1 Performance requirementsAfter being tested in accordance with Clause 5.8.5.2, automatic compensating valves shall not leak and shall continue to comply with Clause 5.7.1.

5.8.5.2 Test procedureThe life cycle test for automatic compensating valves shall be conducted as follows:(a) Install the specimen as shown in Figure 4.(b) Adjust the incoming water supplies so that

(i) temperature T1 at Valve V1 is maintained at a minimum of 60 °C (140°F);(ii) temperature T2 at Valves V1 and V2 is maintained at a maximum of 27 °C (80°F);(iii) flowing pressure P1 at Valves V1 and V2 is maintained at 345 ± 35 kPa (50 ± 5 psi); and(iv) flowing pressure P2 at Valves V1 and V2 is maintained at 172 ± 35 kPa (25 ± 5 psi).

(c) Adjust incoming inlet supply A to a minimum temperature of 60 °C (140°F) and a flowing pressure of 345 ± 35 kPa (50 ± 5 psi) and maintain these conditions. Adjust incoming inlet supply C to a maximum temperature of 27 °C (80°F) and a flowing pressure of 345 ± 35 kPa (50 ± 5 psi) and maintain these conditions. Then adjust the outlet temperature to 40.6 ± 3.0 °C (105 ± 5.0°F) and set the device to a minimum flow rate of 4.5 L/min (1.2 gpm).

(d) Test the control mechanism(s) for the number of cycles specified in Table 4 of the control dial, as follows:(i) for specimens without a separate volume control, turn the temperature control dial at a constant

rate of 5 to 20 cycles/min through its full operating range; or(ii) for specimens with a separate volume control, open the volume control, cycle the temperature

control dial at a constant rate of 5 to 20 cycles/min through its full operating range, simulating the intended operating motion of the valve without making contact with the end steps, except as agreed to with the manufacturer, and close the volume control.

(e) Test the pressure, temperature, or temperature and pressure sensing mechanism(s) for the number of cycles specified in Table 4, with the water flowing through the specimen in the following sequence:(i) inlet supply A and inlet supply D for 4 s; and(ii) inlet supply B and inlet supply C for 4 s.One cycle shall consist of the steps described in Items (i) and (ii).

5.8.6 Thermal expansion relief valves

5.8.6.1 Performance requirementsTER valves shall not leak when tested in accordance with Clause 5.8.6.2.

5.8.6.2 Test procedureThe life cycle test for TER valves shall be conducted as follows:(a) Close all valves.(b) Open the supply valve.(c) Slowly increase the flowing pressure to 120% of the VOP, determined in accordance with

Clause 5.4.5.3.(d) Slowly decrease the supply pressure to 70 kPa (10 psi) less than the VOP.(e) Slowly increase the supply pressure to 35 kPa (5 psi) less than the VOP and hold for 1 min.(f) Repeat the steps specified in Items (a) to (e) for the number of cycles specified in Table 4.(g) Once the cycles specified in Item (f) are completed, check the specimen for leakage, with the supply

pressure set to 70 kPa (10 psi) less than the VOP.



December 2012 17

5.8.7 Supply line stops

5.8.7.1 Performance requirementsAfter being tested in accordance with Clause 5.8.7.2, supply line stops shall continue to function as they did before the life cycle test and shall not leak.

5.8.7.2 ProcedureThe specimen shall be mounted in the life cycle test apparatus so that the test can be performed in a manner that replicates the motion, stresses, and wear expected during use for the number of cycles specified in Table 4.

5.9 Backflow prevention

5.9.1 General

5.9.1.1All fittings shall be tested in accordance with the applicable requirements specified in Clauses 5.9.1.2 and 5.9.1.3 and then retested within 48 to 96 h after completing the applicable life cycle test specified in Clause 5.8.

5.9.1.2Fittings with a submersible outlet(s) shall be provided with a backflow prevention device(s) that complies with the applicable requirements specified in the CAN/CSA-B64 Series or ASME A112.18.3.

5.9.1.3Fittings with plain outlets shall be protected by an air gap in accordance with ASME A112.1.2. Deck-mounted fittings shall have the air gap measured as the vertical distance from the plane of the mounting surface of the fitting to the lowest point of the outlet. When the fitting incorporates threads to accept an aerator or similar device, this measurement shall be taken with the aerator or similar device installed (see Figure 1 of ASME A112.18.1/CSA B125.1).

A critical level mark on the fittings may be used as an alternative to the air gap. The critical level shall be confirmed by the test specified in Clause 5.9.2.6.

5.9.2 Back siphonage test for anti-siphon fill valves

5.9.2.1 Performance requirementsThere shall be no back siphonage from the flush tank into and through the anti-siphon fill valve seat when the valve is tested in accordance with Clauses 5.9.2.2 to 5.9.2.5.

5.9.2.2 Set-upThe anti-siphon fill valve test assembly shall be set up as follows:(a) Verify the location of the critical level of the specimen in accordance with Clause 5.9.2.6.(b) Install the specimen as shown in Figure 5 so that its critical level is 25 mm (1 in) above the top of the

overflow tube.(c) Manually fill the flush tank to the normal operating level with coloured water at 10 ± 6 °C (50 ± 10°F)

prepared separately as follows:(i) add methylene blue dye powder to water in a concentration of approximately 1.5 g/L and mix

thoroughly; and(ii) mix this solution with water in a ratio of 5 mL/L.


B125.3-12 © 2012 CSA Group

18 December 2012

5.9.2.3 Test procedure for anti-siphon fill valves with air gaps or vacuum breakersIf the specimen incorporates an air gap or a vacuum breaker, the following loads shall be applied in sequence with the valve held fully open:(a) Apply and hold a vacuum (expressed in pressure below ambient) of 85 kPa (12 psi) for 5 min and

then allow the pressure on the supply side of the specimen to return to atmospheric.(b) Raise the vacuum test load gradually from 0 to 85 kPa (0 to 12 psi) and then gradually reduce it to

0 kPa (0 psi) during the test.(c) Create a surge effect by rapidly opening and closing the quick-opening valve at least five times. The

applied vacuum load shall start at 0 kPa (0 psi), increase to 85 kPa (12 psi), and then decrease to 0 kPa (0 psi).

Note: 85 kPa (12 psi) is equivalent to 638 mm (25 in) of mercury.

5.9.2.4 Test procedure for anti-siphon fill valves with check valvesWhen the specimen incorporates one or more check valves, the test procedure specified in Clause 5.9.2.3 shall be repeated with all check valves fouled in accordance with Clause 5.9.2.5.

5.9.2.5 FoulingThe check valves of the specimen shall be fouled using a 0.81 mm (0.032 in) diameter fouling wire. On check members that are hinged, the wire shall be placed in the 90° quadrant opposite to the hinge point or point of suspension. When a specimen in which the check members are not hinged but move axially is being tested, the wire shall be placed at a single point on the seating area. The fouling wire shall follow the contour of the valve seats.

When specimens have other types of moving parts for check members, those parts shall be spaced so that they comply with the intent of this Clause.

5.9.2.6 Location of the critical level

5.9.2.6.1 ConditioningWith the specimen installed in accordance with Figure 6, and the overflow tube blocked and all check valves fouled in accordance with Clause 5.9.2.5, the specimen shall be submerged for at least 5 min so that all of its openings and exterior and interior surfaces are thoroughly wetted.

5.9.2.6.2 Determination of the critical levelWith the water level in the flush tank lowered to 3 mm (0.12 in) below the atmospheric vent(s) (in the case of a vacuum-breaker-type anti-siphon fill valve) or water discharge opening (in the case of an air-gap-type anti-siphon fill valve), a vacuum of 85 kPa (12 psi)* shall be applied to the specimen while the water level in the flush tank is gradually lowered. The elevation at which back siphonage ceases (BB in Figure 6) shall be marked. A vacuum of 85 kPa (12 psi)* shall then be applied to the specimen as the water level in the flush tank is gradually raised. The elevation at which back siphonage begins (AA in Figure 6) shall be marked. Whichever elevation is lower shall be the critical level.*85 kPa (12 psi) is equivalent to 638 mm (25 in) of mercury.

5.9.2.6.3 Verification of the critical levelAfter completion of the procedure specified in Clause 5.9.2.6.2, the specimen shall be installed in the flush tank with the critical level located 25 mm (1 in) above the top of the overflow tube (see Figure 6). Surge vacuum loading, as specified in Clause 5.9.2.3(c), shall then be applied to verify the location of the critical level.



December 2012 19

5.9.3 Trap primers

5.9.3.1 Performance requirementsWhen a trap primer is tested in accordance with Clause 5.9.3.3, the maximum rise in the water level in the sight tube shall not exceed 76 mm (3 in).

5.9.3.2 Set-upThe specimen shall be set up as follows:(a) Install the specimen in accordance with the manufacturer’s instructions and as shown in Figure 7,

with the outlet blocked.(b) Install a transparent sight tube of 13 mm (0.5 in) inside diameter and approximately 305 mm (12 in)

long on the discharge outlet.(c) Position the specimen with the sight tube in the vertical position and with the end of the sight tube

submerged 13 mm (0.5 in) in a reservoir of coloured water.(d) Foul all check valves with a 0.81 mm (0.032 in) wire.(e) Open the atmospheric vent(s).(f) Subject the specimen to the vacuum loads sequence specified in Clause 5.9.3.3.

5.9.3.3 Test procedureThe back siphonage test for trap primers shall be conducted as follows:(a) Open Valve 3.(b) Apply a vacuum (expressed in pressure below ambient) of 85 kPa (12 psi)* for 5 min.(c) Close Valve 3, gradually open Valve 2, and allow the pressure on the supply side of the specimen to

slowly return to atmospheric.(d) Repeat the steps specified in Items (a) to (c) with vacuums of 7 kPa (1 psi), 17 kPa (2.5 psi), 34 kPa

(5 psi), and 52 kPa (7.5 psi)†.(e) Close Valve 2 and open Valve 3.(f) Raise the vacuum load gradually from 0 to 85 kPa (0 to 12 psi) and then slowly reduce it to

atmospheric.(g) Create a surge effect by quickly opening and closing Valves 2 and 3 at least five times. The applied

vacuum load shall start at 0 kPa (0 psi), increase to 85 kPa (12 psi), and then decrease to 0 kPa (0 psi).*85 kPa (12 psi) is equivalent to 638 mm (25 in) of mercury.†7 kPa (1 psi), 17 kPa (2.5 psi), 34 kPa (5 psi), and 52 kPa (7.5 psi) are equivalent to 52 mm (2 in) of mercury, 128 mm (5 in) of mercury, 255 mm (10 in) of mercury, and 390 mm (15 in) of mercury, respectively.

6 Markings, packaging, and installation instructions

6.1 GeneralProducts covered by and complying with this Standard shall be marked with(a) the manufacturer’s recognized name, trademark, or other mark; or(b) in the case of private labelling, the name, trademark, or other mark of the customer for whom the

fitting was manufactured.The marking shall be accomplished by use of a permanent mark or by placing a permanent label on the

product.Markings shall be located in such a way that they are visible after installation.

6.2 Anti-siphon fill valvesAnti-siphon fill valves shall be permanently marked with a line and “CL”* to indicate the critical level.*The equivalent French wording is “NC”.


B125.3-12 © 2012 CSA Group

20 December 2012

6.3 Flushometer valvesFlushometer valves equipped with a vacuum breaker shall be permanently marked with a line and “CL”* to indicate the critical level.*The equivalent French wording is “NC”.

6.4 Thermal expansion relief valvesTER valves shall be permanently marked with “TER”* and the VOP.*The equivalent French wording is “DDT”.

6.5 Temperature identificationThe following mixing valves shall have their temperature control settings identified alphabetically, numerically, or graphically:(a) single-handle mixing valves;(b) single-control mixing valves; and(c) automatic compensating mixing valves.Note: Graphically includes colour.

6.6 Packaging

6.6.1Packaging shall be marked with(a) the manufacturer’s recognized name, trademark, or other mark as well as the model number; or(b) in the case of private labelling, the name, trademark or other mark of the customer for whom the

fitting was manufactured, as well as the model number.

6.6.2Packaging for flushometer valves that are designed for specific fixtures with peak flow rates less than those required by this Standard shall be marked with the actual peak flow rate in L/min (gpm) at 172 kPa (25 psi) and the fixture type for which the flushometer valve is designed.

6.7 Installation instructions

6.7.1 Trap primersFull instructions for proper installation shall be supplied with each trap primer. The instructions shall specify the appropriate mounting level of the device above the drain or the flood level rim of the equipment that the trap primer is to serve [these levels shall never be less than 150 mm (6 in)]. The instructions shall include the minimum flow rate or pressure required to activate the device and the resulting discharge rate at those minimum values.

6.7.2 Automatic compensating valvesAutomatic compensating valves shall be accompanied by instructions for their installation, adjustment, and servicing, which shall specify how the handle position or limit setting is to be adjusted.

6.7.3 Anti-siphon fill valvesInstallation instructions indicating that the critical level is located 25 mm (1 in) above the water overflow level in the tank shall accompany each anti-siphon fill valve that is not factory installed.

6.7.4 Flushometer valvesFlushometer valves shall be accompanied by installation, adjustment, and servicing instructions.



December 2012 21

6.8 Flow rate for automatic temperature-limiting devicesThe minimum flow rate for automatic temperature-limiting devices, other than those integral with supply fittings that have a maximum flow rate, shall be specified in the manufacturer’s literature. When the maximum water temperature at the outlet of a device specified by its manufacturer is less than 49 °C (120°F), the lower temperature shall be stated in the manufacturer’s literature.

Table 1Operating requirements

(See Clauses 4.8, 5.6.1, and 5.8.1.3.)

Table 2Minimum flow rates for supply fittings

(See Clause 5.4.1.)

ValveLinear force, N (lbf)

Operating torque, N•m (lbf•in)

Accessible design valve 22 (5) —

Automatic compensating valve 45 (10) 1.7 (15)

Supply line stop NPS-1/2 or smaller 67 (15) 1.7 (15)

Supply line stop larger than NPS-1/2 110 (25) 2.8 (25)

Note: The specified torques and forces apply to the opening operation of the valves.

FittingMinimum flow, L/min (gpm)

Anti-siphon fill valve See Clause 5.4.3.2

Supply line stop:

NPS-3/8 20 (5.3)

NPS-1/2 36 (9.5)

NPS-3/4 68 (18.0)

NPS-1 118 (31.2)

Thermal expansion relief valve See Clause 5.4.5.2

Trap primer See Clause 5.4.6.1

Note: For purposes of determining compliance with these specifications, an observed or calculated value should be rounded “to the nearest unit” in the last right-hand digit used in expressing the specification limit in accordance with the Rounding Method specified in ASTM E29.


B125.3-12 © 2012 CSA Group

22 December 2012

Table 3Allowable variations in discharge temperature

for thermostatic compensating valves(See Clause 5.7.1.)

Table 4Life cycle test cycles

(See Clauses 5.8.1.1, 5.8.2.2, 5.8.3.2, 5.8.4.2, 5.8.5.2, 5.8.6.2, and 5.8.7.2.)

Nominal size of valve, in

Allowable variation for 20% pressure fluctuations with supply temperature constant, °C (°F)

Allowable variation for 15 to –15 °C (27 to –27°F) change in hot water supply temperature, with supply pressure constant, °C (°F)

1/2 ±2.0 (±3.6) ±2.5 (±4.5)

3/4 ±3.0 (±5.4) ±3.6 (±6.5)

1 ±4.0 (±7.2) ±4.4 (±7.9)

FittingNumber of cycles

Anti-siphon fill valve 250 000

Automatic compensating valve:

Control 20 000

Pressure- and temperature-sensing mechanism 80 000

Flushometer valve 250 000

Supply line stop 10 000

Thermal expansion relief valve 10 000

Trap primer 5 000



December 2012 23

Figure 1Typical trap primer

(See Clause 4.16.3.)

Figure 2Shank for anti-siphon fill valve

(See Clause 4.18.1.1.)

Air gap

Inlet watersupply

Outlet to fixture

Secondary outletto trap

30 mm(1.18 in)

minimum

This surface shall be smooth and flat for a gasket face seal. The inside corner shall have a corner break.

15/16–14 special thread of AmericanNa�onal Form — Class 1 Fit (15/16–14 NS-1)

Major diameter 23.404 to 23.759 mm (0.921 to 0.935 in)Pitch diameter 22.403 to 22.581 mm (0.882 to 0.889 in)

45 mm(1.77 in)


B125.3-12 © 2012 CSA Group

24 December 2012

Figure 3Test assembly for determining valve opening pressure for thermal expansion relief valves


Figure 4Set-up for life cycle test for automatic compensating valves


Specimen

Supplyvalve

Pressuregauge

Flow meter

Watersupply

Pressuregauge

Adjustablepressureregulator

Divertervalve

V1

Divertervalve

V2

Specimen

Outlet

Temperature T2/ Pressure P1Inlet supply C

Temperature T2/Pressure P2Inlet supply D

Temperature T1/Pressure P1

Inlet supply A

Temperature T2/Pressure P2

Inlet supply B



December 2012 25

Figure 5Anti-siphon fill valve test assembly


To water closet bowl

To vacuum tank

Tankrefill

Bowl refill tube

25 mm (1.0 in)

An�-siphon fill valve

Overflow tube

Colouredwater in tank

Water overflowlevel

Watercollec�ngtank

Drain

Slow-opening valve

Quick-opening valve

Pressure gauge

Sightglass


B125.3-12 © 2012 CSA Group

26 December 2012

Figure 6Location of critical level for anti-siphon fill valves


Free-fall outletto flush tank

Sight glass

Air-gapan�-siphon fill valve

Overflow tube (opening blocked)AABB


Vacuumsource


Vacuum source

Refilltube

AABB

Sight glass

Overflow tube (opening blocked)

Vacuum-breakeran�-siphon fill valve

(a) Air-gap an�-siphon fill valve

(b) Vacuum-breaker an�-siphon fill valve



December 2012 27

Figure 7Set-up for back siphonage test for trap primers


Vacuum pumpand tank

Vacuum regulator

Vacuum pressure gauge

Vacuum(Valve 3)

Atmosphere(Valve 2)

Water(Valve 3)

Outlet blocked

Specimen

Sight tube

Colouredwater

Inlet

Drain

13 mm (0.5 in)submersion

305 mm(12 in)


B125.3-12 © 2012 CSA Group

28 December 2012

Annex A (informative)Unit conversion and rounding criteria

Note: This Annex is an informative (non-mandatory) part of this Standard.

A.1 ConversionThe following conversion rules are used in this Standard:(a) Zeros to the left of the first non-zero digit are not significant.(b) If the number is greater than 1, all zeros to the right of the decimal point are significant.(c) In multiplication and division, the original number with the smallest number of significant digits

determines the number of significant digits in the product or quotient.(d) If an exact constant is used (e.g., 3 ft = 1 yd), it does not affect the number of significant digits in the

calculated value.(e) If inexact constants are used (e.g., = 3.1416), the constant with at least one more significant digit

than the smallest number of significant digits in the original data is used.

A.2 RoundingThe following rounding rules are used in this Standard:(a) The digits that follow the last significant digit are dropped if the first digit is less than 5.(b) If the first digit dropped is greater than 5, the preceding digit is increased by 1.(c) If the first digit dropped is 5 and there are non-zero digits following the 5, the preceding digit is

increased by 1.(d) If the first digit dropped is 5 and there are only zeros following the 5, the digit is rounded to the even

number (e.g., for three significant digits, 1.655000 becomes 1.66, 1.625000 becomes 1.62).(e) For maximums and minimums, rounding is performed within the range of the maximum and

minimum values in a way that does not violate the original limits.



PRIN

TED IN CANADA

IMPRIME AU CANADA

100%

ISBN 978-1-77139-021-7

CSA Group prints its publications on Rolland Enviro100, which contains 100% recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy.


Documents

Plumbing fittings - IAPMOmirobase.iapmo.org/standards/standards/5041.pdfTitle:Plumbing fittings Pagination:37 pages (ix preliminary and 28 text), each dated December 2012 ... D. Green