Part 7. Plumbing

7.1.

General

7.1.0.

Scope

7.1.0.1.

Scope

7.1.1.

Application

7.1.1.1.

Application

7.1.1A.

Definitions

7.1.1A.1.

Definitions

7.1.1B.

Plumbing Facilities

7.1.1B.1.

Facilities Required

7.1.1B.2.

Floor Drains

7.1.2.

Service Connections

7.1.2.1.

Sanitary Drainage Systems

7.1.2.2.

Storm Drainage Systems

7.1.2.3.

Water Distribution Systems

7.1.2.4.

Separate Services

7.1.2.5.

Private Sewers and Private Water Supply

7.1.3.

Location of Fixtures

7.1.3.1.

Lighting and Ventilation Requirements

7.1.3.2.

Accessibility

7.1.3A.

Accommodating Movement

7.1.3A.1.

Structural Movement

7.1.4.

Seismic Design

7.1.4.1.

Seismic Restraints and Design

7.2.

Materials and Equipment

7.2.1.

General

7.2.1.1.

Exposure of Materials

7.2.1.2.

Restrictions on Re-Use

7.2.1.3.

Identification

7.2.1.4.

Pipe or Piping

7.2.1.5.

Withstanding Pressure

7.2.1.6.

Working Pressure of a Water Service Pipe

7.2.2.

Fixtures

7.2.2.1.

Surface Requirements

7.2.2.2.

Conformance to Standards

7.2.2.3.

Showers

7.2.2.4.

Concealed Overflows

7.2.2.5.

Water Closets in Public Washrooms

7.2.2.6.

Lavatories

7.2.2.7.

Trough Urinals

7.2.3.

Traps and Interceptors

7.2.3.1.

Traps

7.2.3.2.

Interceptors

7.2.3.3.

Tubular Traps

7.2.4.

Pipe Fittings

7.2.4.1.

T and Cross Fittings

7.2.4.2.

Sanitary T Fittings

7.2.4.3.

90° Elbows

7.2.4.4.

Fittings Restricted in Use

7.2.4.5.

Assembled Pipe or Tubing

7.2.5.

Non-Metallic Pipe and Fittings

7.2.5.1.

Fibrocement Pipe and Fittings

7.2.5.2.

Concrete Pipe and Fittings

7.2.5.3.

Vitrified Clay Pipe and Fittings

7.2.5.4.

Polyethylene Pipe and Fittings

7.2.5.5.

Polyethylene Pipe Used Underground

7.2.5.6.

Crosslinked Polyethylene Pipe and Fittings

7.2.5.7.

PVC Pipe and Fittings

7.2.5.8.

CPVC Pipe, Fittings and Solvent Cements

7.2.5.9.

Plastic Pipe, Fittings and Solvent Cement Used Underground

7.2.5.10.

Transition Solvent Cement

7.2.5.11.

Plastic Pipe, Fittings and Solvent Cement Used in Buildings

7.2.5.12.

Polyethylene Composite Pipe and Fittings

7.2.5.13.

Crosslinked Polyethylene Composite Pressure Pipe and Fittings

7.2.5.14.

Polypropylene Pipe and Fittings

7.2.5.15.

Polyethylene of Raised Temperature Tube and Fittings

7.2.5.16.

Cellular Core PVC Pipe and Fittings

7.2.6.

Ferrous Pipe and Fittings

7.2.6.1.

Cast-Iron Drainage and Vent Pipe and Fittings

7.2.6.2.

Maintenance Holes and Catch Basins

7.2.6.3.

Threaded Cast-Iron Drainage Fittings

7.2.6.4.

Cast-Iron Water Pipes

7.2.6.5.

Screwed Cast-Iron Water Fittings

7.2.6.6.

Screwed Malleable-Iron Water Fittings

7.2.6.7.

Steel Pipe

7.2.6.8.

Corrugated Steel Pipe and Couplings

7.2.6.9.

Sheet Metal Leaders

7.2.6.10.

Stainless Steel Pipe

7.2.6.11.

Stainless Steel Butt Weld Pipe Fittings

7.2.6.12.

Stainless Steel Pipe Flanges

7.2.6.13.

Stainless Steel Threaded Fittings

7.2.6.14.

Stainless Steel Tube

7.2.6.15.

Stainless Steel Pipe and Tube

7.2.7.

Non-Ferrous Pipe and Fittings

7.2.7.1.

Copper and Brass Pipe

7.2.7.2.

Brass or Bronze Pipe Flanges and Flanged Fittings

7.2.7.3.

Brass or Bronze Threaded Water Fittings

7.2.7.4.

Copper Tube

7.2.7.5.

Solder-Joint Drainage Fittings

7.2.7.6.

Solder-Joint Water Fittings

7.2.7.7.

Flared-Joint Fittings for Copper Tube Water Systems

7.2.7.8.

Lead Waste Pipe and Fittings

7.2.8.

Corrosion-Resistant Materials

7.2.8.1.

Pipe and Fittings

7.2.9.

Jointing Materials

7.2.9.1.

Cement Mortar

7.2.9.2.

Solder and Fluxes

7.2.10.

Miscellaneous Materials

7.2.10.1.

Floor Flanges

7.2.10.2.

Screws, Bolts, Nuts and Washers

7.2.10.3.

Cleanout Fittings

7.2.10.4.

Mechanical Couplings

7.2.10.5.

Saddle Hubs

7.2.10.6.

Valves, Supply and Waste Fittings

7.2.10.7.

Water Temperature Control

7.2.10.7A.

Temperature Control Devices

7.2.10.7B.

Showers

7.2.10.7C.

Linings and Coatings of Water Storage Tanks

7.2.10.8.

Direct Flush Valves

7.2.10.9.

Drinking Fountain Bubblers

7.2.10.10.

Back-Siphonage Preventers and Backflow Preventers

7.2.10.11.

Relief Valves

7.2.10.12.

Reducing Valves

7.2.10.13.

Solar Domestic Hot Water

7.2.10.14.

Vent Pipe Flashing

7.2.10.15.

Water Hammer Arresters

7.2.10.16.

Air Admittance Valves

7.2.10.17.

Drinking Water Treatment Systems

7.2.10.18.

Flexible Water Connectors

7.2.11.

Water Service Pipes and Fire Service Mains

7.2.11.1.

Design, Construction, Installation and Testing

7.2.11.2.

Certification or Conformance

7.2.11.3.

Tracer Wire

7.2.11.4.

Required Check Valve

7.3.

Piping

7.3.1.

Application

7.3.1.1.

General

7.3.2.

Construction and Use of Joints

7.3.2.1.

Caulked Lead Drainage Joints

7.3.2.2.

Wiped Joints

7.3.2.3.

Screwed Joints

7.3.2.4.

Solder Joints

7.3.2.5.

Flared Joints

7.3.2.6.

Mechanical Joints

7.3.2.7.

Cold-Caulked Joints

7.3.2.8.

Stainless Steel Welded Joints

7.3.3.

Joints and Connections

7.3.3.1.

Drilled and Tapped Joints

7.3.3.2.

Extracted Tees

7.3.3.3.

Prohibition of Welding of Pipes and Fittings

7.3.3.4.

Unions and Slip Joints

7.3.3.5.

Increaser or Reducer

7.3.3.6.

Dissimilar Materials

7.3.3.7.

Connection of Roof Drain to Leader

7.3.3.8.

Connection of Floor or Wall Outlet Fixtures

7.3.3.9.

Expansion and Contraction

7.3.3.10.

Copper Tube

7.3.3.11.

Indirect Connections

7.3.3.12.

Copper Joints Used Underground

7.3.4.

Support of Piping

7.3.4.1.

Capability of Support

7.3.4.2.

Independence of Support

7.3.4.3.

Insulation of Support

7.3.4.4.

Support for Vertical Piping

7.3.4.5.

Support for Horizontal Piping

7.3.4.6.

Support for Underground Horizontal Piping

7.3.4.7.

Support for Vent Pipe Above a Roof

7.3.4.8.

Compression Fittings

7.3.4.9.

Thrust Restraint of Water Service Pipes

7.3.5.

Protection of Piping

7.3.5.1.

Protection of Piping

7.3.5.1A.

Protection of Non-Metallic Pipe

7.3.5.2.

Isolation from Loads

7.3.5.3.

Protection Against Freezing

7.3.5.4.

Protection from Mechanical Damage

7.3.5.5.

Protection from Condensation

7.3.5.6.

Spatial Separation

7.3.6.

Testing of Drainage and Venting Systems

7.3.6.1.

Tests and Inspection of Drainage or Venting Systems

7.3.6.2.

Tests of Pipes in Drainage Systems

7.3.6.3.

Tests of Venting Systems

7.3.6.4.

Water Pressure Tests

7.3.6.5.

Air Pressure Tests

7.3.6.6.

Final Tests

7.3.6.7.

Ball Tests

7.3.7.

Testing of Potable Water Systems

7.3.7.1.

Application of Tests

7.3.7.2.

Pressure Tests of Potable Water Systems

7.3.7.3.

Water Pressure Tests

7.4.

Drainage Systems

7.4.1.

Application

7.4.1.1.

General

7.4.2.

Connections to Drainage Systems

7.4.2.1.

Connections to Sanitary Drainage Systems

7.4.2.2.

Connection of Overflows from Rainwater Tanks

7.4.2.3.

Direct Connections

7.4.3.

Location of Fixtures

7.4.3.1.

Plumbing Fixtures

7.4.3.2.

Restricted Locations of Indirect Connections and Traps

7.4.3.3.

Equipment Restrictions Upstream of Grease Interceptors

7.4.3.4.

Fixtures Located in Chemical Storage Locations

7.4.3.5.

Macerating Toilet System

7.4.3.6.

Drains Serving Elevator Pits

7.4.4.

Treatment of Sewage and Wastes

7.4.4.1.

Sewage Treatment

7.4.4.2.

Cooling of Hot Water or Sewage

7.4.4.3.

Interceptors

7.4.4.4.

Neutralizing and Dilution Tanks

7.4.5.

Traps

7.4.5.1.

Traps for Sanitary Drainage Systems

7.4.5.2.

Traps for Storm Drainage Systems

7.4.5.3.

Connection of Subsoil Drainage Pipe to a Sanitary Drainage System

7.4.5.4.

Location and Cleanout for Building Traps

7.4.5.5.

Trap Seals

7.4.6.

Arrangement of Drainage Piping

7.4.6.1.

Separate Systems

7.4.6.2.

Location of Sanitary Drainage Pipes

7.4.6.3.

Sumps or Tanks

7.4.6.4.

Protection from Backflow

7.4.6.5.

Mobile Home Sewer Service

7.4.6.6.

Building Drain Ends

7.4.7.

Cleanouts

7.4.7.1.

Cleanouts for Drainage Systems

7.4.7.2.

Size and Spacing of Cleanouts

7.4.7.3.

Manholes

7.4.7.4.

Location of Cleanouts

7.4.8.

Minimum Slope and Length of Drainage Pipes

7.4.8.1.

Minimum Slope

7.4.8.2.

Length of Fixture Outlet Pipes

7.4.9.

Size of Drainage Pipes

7.4.9.1.

No Reduction in Size

7.4.9.2.

Serving Water Closets

7.4.9.3.

Size of Fixture Outlet Pipes

7.4.9.4.

Minimum Size of Building Drain and Sewer

7.4.9.5.

Offset in Leaders

7.4.10.

Hydraulic Loads

7.4.10.1.

Total Load on a Pipe

7.4.10.2.

Hydraulic Loads for Fixtures

7.4.10.3.

Hydraulic Loads from Fixtures with a Continuous Flow

7.4.10.4.

Hydraulic Loads from Roofs or Paved Surfaces

7.4.10.5.

min

7.4.10.6.

Hydraulic Loads to Soil or Waste Pipes

7.4.10.7.

Hydraulic Loads on Branches

7.4.10.8.

Hydraulic Loads on Sanitary Building Drains or Sewers

7.4.10.9.

Hydraulic Loads on Horizontal Storm Drains

7.4.10.10.

Hydraulic Loads to Roof Gutters

7.4.10.11.

Hydraulic Loads on Leaders

7.4.10.12.

Hydraulic Loads from Fixtures with a Semi-continuous Flow

7.4.10.13.

Reserved.

7.5.

Venting Systems

7.5.1.

Vent Pipes for Traps

7.5.1.1.

Venting for Traps

7.5.2.

Wet Venting

7.5.2.1.

Wet Venting

7.5.3.

Circuit Venting

7.5.3.1.

Circuit Venting

7.5.4.

Vent Pipes for Stacks

7.5.4.1.

Stack Vents

7.5.4.2.

Vent Stacks

7.5.4.3.

Yoke Vents

7.5.4.4.

Offset Relief Vents

7.5.4.5.

Fixtures Draining into Vent Pipes

7.5.5.

Miscellaneous Vent Pipes

7.5.5.1.

Venting of Sanitary Sewage Sumps

7.5.5.2.

Venting of Interceptors

7.5.5.3.

Venting of Drain Piping and Dilution Tanks for Corrosive Waste

7.5.5.4.

Fresh Air Inlets

7.5.5.5.

Provision for Future Installations

7.5.6.

Arrangement of Vent Pipes

7.5.6.1.

Drainage of Vent Pipes

7.5.6.2.

Vent Pipe Connections

7.5.6.3.

Location of Vent Pipes

7.5.6.4.

Connection of Vents Above Fixtures Served

7.5.6.5.

Terminals

7.5.7.

Minimum Size of Vent Pipes

7.5.7.1.

General

7.5.7.2.

Size Restriction

7.5.7.3.

Additional Circuit Vents and Relief Vents

7.5.7.4.

Offset Relief Vents

7.5.7.5.

Yoke Vents

7.5.7.6.

Vent Pipes for Manholes

7.5.7.7.

Vents for Sewage Sumps, Neutralizing and Dilution Tanks, and Macerating Toilet Systems

7.5.8.

Sizing of Vent Pipes

7.5.8.1.

Hydraulic Loads Draining to Wet Vents

7.5.8.2.

Individual Vents and Dual Vents

7.5.8.3.

Branch Vents, Vent Headers, Continuous Vents and Circuit Vents

7.5.8.4.

Vent Stacks or Stack Vents

7.5.8.5.

Lengths for Other Vent Pipes

7.5.9.

Air Admittance Valves

7.5.9.1.

Air Admittance Valve as a Vent Terminal

7.5.9.2.

Air Admittance Valves

7.5.9.3.

Installation Conditions

7.6.

Potable Water Systems

7.6.1.

Arrangement of Piping

7.6.1.1.

Design

7.6.1.2.

Drainage

7.6.1.3.

Control and Shut-Off Valves

7.6.1.3A.

Public Washrooms

7.6.1.3B.

Tanks

7.6.1.4.

Protection for Exterior Water Supply

7.6.1.5.

Check Valves

7.6.1.6.

Flushing Devices

7.6.1.7.

Relief Valves

7.6.1.8.

Solar Domestic Hot Water Systems

7.6.1.9.

Water Hammer

7.6.1.10.

Mobile Home Water Service

7.6.1.11.

Thermal Expansion

7.6.2.

Protection from Contamination

7.6.2.1.

Connection of Systems

7.6.2.2.

Back-Siphonage

7.6.2.3.

Backflow Caused by Back Pressure

7.6.2.4.

Backflow from Fire Protection Systems

7.6.2.5A.

Backflow from Buildings with a Solar Domestic Hot Water System

7.6.2.6.

Premise Isolation

7.6.2.7.

Hose Bibb

7.6.2.8.

Cleaning of Systems

7.6.2.9.

Air Gap

7.6.2.10.

Vacuum Breakers

7.6.2.11.

Tank-Type Water Closets

7.6.3.

Size and Capacity of Pipes

(See Note A-7.6.3.)

7.6.3.1.

Design, Fabrication and Installation

7.6.3.2.

Hydraulic Load

7.6.3.3.

Static Pressure

7.6.3.4.

Size

7.6.3.5.

Velocity

7.6.4.

Water Efficiency

7.6.4.1.

Water Supply Fittings

7.7.

Non-Potable Water Systems

7.7.1.

Non-Potable Water Systems

7.7.1.1.

General

7.7.1.2.

Identification and Marking

7.7.1.3.

Location of Pipes

7.7.1.4.

Location of Outlets

7.7.2.

Non-Potable Rainwater Harvesting Systems

7.7.2.1.

General

7.7.2.2.

Permitted Applications

7.7.2.3.

Roof Design

7.7.2.4.

Non-Potable Rainwater Harvesting System Design

7.7.3.

Non-Potable Water Systems for Re-use Purposes

7.7.3.1.

Conformance to Standards