Piping Materials

Plumbing Systems

CNST 305 Environmental Systems 1Dr. Berryman

1b Introduction – Materials Chapter 1, 3; Appendix D (Wentz)

and 7.4.1 - 7.4.3 (Tao)

4.39 Building Codes and Standards (2 hrs); 4.44 Notes and specifications, reference conventions (1 hrs)

Material Selection Criteria

Corrosiveness Temperature Pressure Material allowed by code Availability Cost of material/installation Miscellaneous

Noise Combustion

Steel (carbon) PipeTypes Black

GalvanizedCast Iron

Connections Tapered Thread or Threaded*FlangedGroovedWelded

Sizes/Weight Schedule 40*, 80, 120Nominal I.D. used for measure (ie ¾” = .82 inches; O.D. = 1.0 inches)Cast iron – SV* and XH

Fittings Elbow, couplings, union, wye, street L, reducer, dielectric, 90o L, etc.

*most commonly used

Cast Iron

Copper (nonferrous)

Types Tempered hard or soft

Connections Soldered (sweated)*FlangedCompression

Sizes/Weight K – heaviest with green stripeL – medium weight w/ blue stripeM – lightest w/ red strip*DWV – yellow stripe (non pressure) Measured O.D.

Fittings Elbow, couplings, street L, reducer, dielectric, 90o L, Tees, etc.

*most commonly used

Plastics (polymers)

Types ABS, CPVC*, PB, PE, PP, PVC*, PVDF, Fiberglass

Connections Solvent weld*Flanged (plastic)Compression

Sizes/Weight Schedule 40*, 80 or 200 psi

Fittings Elbow, couplings, street L, reducer, dielectric, 90o L, Tees, etc.

Stone-Based

Types Concrete Clay Glass

Connections Compression (neoprene gasket or O-ring)Concrete grout

Sizes/Weight Diameters (ie up to 144” for concrete)

Fittings Elbow, reducers, couplings, hub and spigot, etc.

Valves

Butterfly Check Gate Globe Ball

Terminology Riser

• Vertical water supply piping supplying more one floor or more

Stack• Vertical DWV piping (exceptions vertical fixtures and

vented stacks…ie stack vents, vent stacks)

Branch• Horizontal piping (water and DWV) for plumbing

other than a riser, main or stack

Main• Principal pipe supply for connecting branches

Terminology (cont.) Vent Lines Soil Lines Traps Air Gap/Break

• Prevents back sophoning• Flush valves have air breaks

Flushometers (flush valves) Sump

• A tank or pit that receives liquid wastes

Grey water

Terminology (cont.)

Potable Water Water Service

• From water main

Water Distribution Service• Water piping within the building to point of usage

Water Supply System• All water pipes, fittings, control valves, etc. within

and adjacent to building

Next Time

Waste Water Disposal and Storm Drainage

• Chapter 4, 7; Appendix A (Wentz) and 8.6 -8.7 (Toa)