National Plumbing Code of Canada 2010 – Intent Statements

From: National Research Council Canada

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Titlepage
Preface
Division A Compliance, Objectives and Functional Statements
- Part 1 - Compliance
  - Section 1.4. Terms and Abbreviations
    - 1.4.1. Definitions of Words and Phrases
      - 1.4.1.2. Defined Terms
- Part 2 - Objectives
  - Section 2.2. Objectives
    - 2.2.1. Objectives
      - 2.2.1.1. Objectives
- Part 3 - Functional Statements
  - Section 3.2. Functional Statements
    - 3.2.1. Functional Statements
      - 3.2.1.1. Functional Statements
Division B Acceptable Solutions
- Part 2 - Plumbing Systems
  - Section 2.1. General
    - 2.1.1. Application
      - 2.1.1.1. Application
        
        2.1.1.1.(1)
    - 2.1.2. Service Connections
      - 2.1.2.1. Sanitary Drainage Systems
        
        2.1.2.1.(1)
        
        2.1.2.1.(2)
      - 2.1.2.2. Storm Drainage Systems
        
        2.1.2.2.(1)
      - 2.1.2.3. Water Distribution Systems
        
        2.1.2.3.(1)
      - 2.1.2.4. Separate Services
        
        2.1.2.4.(1)
    - 2.1.3. Location of Fixtures
      - 2.1.3.1. Lighting and Ventilation Requirements
        
        2.1.3.1.(1)
      - 2.1.3.2. Accessibility
        
        2.1.3.2.(1)
  - Section 2.2. Materials and Equipment
    - 2.2.1. General
      - 2.2.1.1. Exposure of Materials
        
        2.2.1.1.(1)
        
        2.2.1.1.(2)
      - 2.2.1.2. Restrictions on Re-Use
        
        2.2.1.2.(1)
      - 2.2.1.3. Identification
        
        2.2.1.3.(1)
        
        2.2.1.3.(2)
      - 2.2.1.4. Pipe or Piping
        
        2.2.1.4.(1)
      - 2.2.1.5. Withstanding Pressure
        
        2.2.1.5.(1)
      - 2.2.1.6. Working Pressure of a Water Service Pipe
        
        2.2.1.6.(1)
    - 2.2.2. Fixtures
      - 2.2.2.1. Surface Requirements
        
        2.2.2.1.(1)
      - 2.2.2.2. Conformance to Standards
        
        2.2.2.2.(1)
        
        2.2.2.2.(2)
        
        2.2.2.2.(3)
        
        2.2.2.2.(4)
        
        2.2.2.2.(5)
        
        2.2.2.2.(6)
        
        2.2.2.2.(7)
        
        2.2.2.2.(8)
      - 2.2.2.3. Showers
        
        2.2.2.3.(1)
        
        2.2.2.3.(2)
        
        2.2.2.3.(3)
        
        2.2.2.3.(4)
      - 2.2.2.4. Concealed Overflows
        
        2.2.2.4.(1)
      - 2.2.2.5. Water Closets in Public Washrooms
        
        2.2.2.5.(1)
    - 2.2.3. Traps and Interceptors
      - 2.2.3.1. Traps
        
        2.2.3.1.(1)
        
        2.2.3.1.(2)
        
        2.2.3.1.(3)
        
        2.2.3.1.(4)
        
        2.2.3.1.(5)
      - 2.2.3.2. Interceptors
        
        2.2.3.2.(1)
        
        2.2.3.2.(2)
      - 2.2.3.3. Tubular Traps
        
        2.2.3.3.(1)
    - 2.2.4. Pipe Fittings
      - 2.2.4.1. T and Cross Fittings
        
        2.2.4.1.(1)
        
        2.2.4.1.(2)
      - 2.2.4.2. Sanitary T Fittings
        
        2.2.4.2.(1)
        
        2.2.4.2.(2)
      - 2.2.4.3. 90° Elbows
        
        2.2.4.3.(1)
        
        2.2.4.3.(2)
    - 2.2.5. Non-Metallic Pipe and Fittings
      - 2.2.5.1. Asbestos-Cement Drainage Pipe and Fittings
        
        2.2.5.1.(1)
        
        2.2.5.1.(2)
      - 2.2.5.2. Asbestos-Cement Water Pipe and Fittings
        
        2.2.5.2.(1)
        
        2.2.5.2.(2)
      - 2.2.5.3. Concrete Pipe and Fittings
        
        2.2.5.3.(1)
        
        2.2.5.3.(2)
        
        2.2.5.3.(3)
        
        2.2.5.3.(4)
        
        2.2.5.3.(5)
      - 2.2.5.4. Vitrified Clay Pipe and Fittings
        
        2.2.5.4.(1)
        
        2.2.5.4.(2)
        
        2.2.5.4.(3)
      - 2.2.5.5. Polyethylene Pipe and Fittings
        
        2.2.5.5.(1)
        
        2.2.5.5.(2)
        
        2.2.5.5.(3)
      - 2.2.5.6. Polyethylene Pipe Used Underground
        
        2.2.5.6.(1)
      - 2.2.5.7. Crosslinked Polyethylene Pipe and Fittings
        
        2.2.5.7.(1)
      - 2.2.5.8. PVC Pipe and Fittings
        
        2.2.5.8.(1)
        
        2.2.5.8.(2)
        
        2.2.5.8.(3)
        
        2.2.5.8.(4)
      - 2.2.5.9. CPVC Pipe, Fittings and Solvent Cements
        
        2.2.5.9.(1)
        
        2.2.5.9.(2)
      - 2.2.5.10. Plastic Pipe, Fittings and Solvent Cement Used Underground
        
        2.2.5.10.(1)
      - 2.2.5.11. Transition Solvent Cement
        
        2.2.5.11.(1)
        
        2.2.5.11.(2)
      - 2.2.5.12. Plastic Pipe, Fittings and Solvent Cement Used in Buildings
        
        2.2.5.12.(1)
        
        2.2.5.12.(2)
        
        2.2.5.12.(3)
      - 2.2.5.13. Polyethylene/Aluminum/Polyethylene Composite Pipe and Fittings
        
        2.2.5.13.(1)
        
        2.2.5.13.(2)
        
        2.2.5.13.(3)
        
        2.2.5.13.(4)
      - 2.2.5.14. Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Composite Pressure Pipe and Fittings
        
        2.2.5.14.(1)
      - 2.2.5.15. Polypropylene Pipe and Fittings
        
        2.2.5.15.(1)
    - 2.2.6. Ferrous Pipe and Fittings
      - 2.2.6.1. Cast-Iron Drainage and Vent Pipe and Fittings
        
        2.2.6.1.(1)
        
        2.2.6.1.(2)
      - 2.2.6.2. Cast-Iron Fittings for Asbestos-Cement Drainage Pipe
        
        2.2.6.2.(1)
      - 2.2.6.3. Threaded Cast-Iron Drainage Fittings
        
        2.2.6.3.(1)
        
        2.2.6.3.(2)
      - 2.2.6.4. Cast-Iron Water Pipes
        
        2.2.6.4.(1)
        
        2.2.6.4.(2)
        
        2.2.6.4.(3)
        
        2.2.6.4.(4)
      - 2.2.6.5. Screwed Cast-Iron Water Fittings
        
        2.2.6.5.(1)
        
        2.2.6.5.(2)
        
        2.2.6.5.(3)
      - 2.2.6.6. Screwed Malleable Iron Water Fittings
        
        2.2.6.6.(1)
        
        2.2.6.6.(2)
        
        2.2.6.6.(3)
      - 2.2.6.7. Steel Pipe
        
        2.2.6.7.(1)
        
        2.2.6.7.(2)
        
        2.2.6.7.(3)
        
        2.2.6.7.(4)
      - 2.2.6.8. Corrugated Steel Pipe and Couplings
        
        2.2.6.8.(1)
        
        2.2.6.8.(2)
        
        2.2.6.8.(3)
      - 2.2.6.9. Sheet Metal Leaders
        
        2.2.6.9.(1)
    - 2.2.7. Non-Ferrous Pipe and Fittings
      - 2.2.7.1. Copper and Brass Pipe
        
        2.2.7.1.(1)
        
        2.2.7.1.(2)
      - 2.2.7.2. Brass or Bronze Pipe Flanges and Flanged Fittings
        
        2.2.7.2.(1)
      - 2.2.7.3. Brass or Bronze Threaded Water Fittings
        
        2.2.7.3.(1)
        
        2.2.7.3.(2)
      - 2.2.7.4. Copper Tube
        
        2.2.7.4.(1)
        
        2.2.7.4.(2)
        
        2.2.7.4.(3)
      - 2.2.7.5. Solder-Joint Drainage Fittings
        
        2.2.7.5.(1)
        
        2.2.7.5.(2)
      - 2.2.7.6. Solder-Joint Water Fittings
        
        2.2.7.6.(1)
        
        2.2.7.6.(2)
      - 2.2.7.7. Flared-Joint Fittings for Copper Water Systems
        
        2.2.7.7.(1)
        
        2.2.7.7.(2)
      - 2.2.7.8. Lead Waste Pipe and Fittings
        
        2.2.7.8.(1)
        
        2.2.7.8.(2)
    - 2.2.8. Corrosion-Resistant Materials
      - 2.2.8.1. Pipes and Fittings
        
        2.2.8.1.(1)
    - 2.2.9. Jointing Materials
      - 2.2.9.1. Cement Mortar
        
        2.2.9.1.(1)
      - 2.2.9.2. Solders and Fluxes
        
        2.2.9.2.(1)
        
        2.2.9.2.(2)
        
        2.2.9.2.(3)
        
        2.2.9.2.(4)
    - 2.2.10. Miscellaneous Materials
      - 2.2.10.1. Brass Floor Flanges
        
        2.2.10.1.(1)
      - 2.2.10.2. Screws, Bolts, Nuts and Washers
        
        2.2.10.2.(1)
      - 2.2.10.3. Cleanout Fittings
        
        2.2.10.3.(1)
        
        2.2.10.3.(2)
      - 2.2.10.4. Mechanical Couplings
        
        2.2.10.4.(1)
        
        2.2.10.4.(2)
      - 2.2.10.5. Saddle Hubs
        
        2.2.10.5.(1)
      - 2.2.10.6. Supply and Waste Fittings
        
        2.2.10.6.(1)
        
        2.2.10.6.(2)
      - 2.2.10.7. Water Temperature Control
        
        2.2.10.7.(1)
        
        2.2.10.7.(2)
        
        2.2.10.7.(3)
        
        2.2.10.7.(4)
      - 2.2.10.8. Direct Flush Valves
        
        2.2.10.8.(1)
      - 2.2.10.9. Drinking Fountain Bubblers
        
        2.2.10.9.(1)
        
        2.2.10.9.(2)
        
        2.2.10.9.(3)
      - 2.2.10.10. Back-Siphonage Preventers and Backflow Preventers
        
        2.2.10.10.(1)
        
        2.2.10.10.(2)
      - 2.2.10.11. Relief Valves
        
        2.2.10.11.(1)
      - 2.2.10.12. Reducing Valves
        
        2.2.10.12.(1)
      - 2.2.10.13. Solar Domestic Hot Water
        
        2.2.10.13.(1)
      - 2.2.10.14. Vent Pipe Flashing
        
        2.2.10.14.(1)
        
        2.2.10.14.(2)
      - 2.2.10.15. Water Hammer Arresters
        
        2.2.10.15.(1)
      - 2.2.10.16. Air Admittance Valves
        
        2.2.10.16.(1)
  - Section 2.3. Piping
    - 2.3.1. Application
      - 2.3.1.1. General
        
        2.3.1.1.(1)
    - 2.3.2. Construction and Use of Joints
      - 2.3.2.1. Caulked Lead Drainage Joints
        
        2.3.2.1.(1)
        
        2.3.2.1.(2)
        
        2.3.2.1.(3)
        
        2.3.2.1.(4)
      - 2.3.2.2. Wiped Joints
        
        2.3.2.2.(1)
        
        2.3.2.2.(2)
        
        2.3.2.2.(3)
      - 2.3.2.3. Screwed Joints
        
        2.3.2.3.(1)
        
        2.3.2.3.(2)
      - 2.3.2.4. Soldered Joints
        
        2.3.2.4.(1)
      - 2.3.2.5. Flared Joints
        
        2.3.2.5.(1)
        
        2.3.2.5.(2)
      - 2.3.2.6. Mechanical Joints
        
        2.3.2.6.(1)
      - 2.3.2.7. Cold-Caulked Joints
        
        2.3.2.7.(1)
        
        2.3.2.7.(2)
        
        2.3.2.7.(3)
    - 2.3.3. Joints and Connections
      - 2.3.3.1. Drilled and Tapped Joints
        
        2.3.3.1.(1)
      - 2.3.3.2. Extracted Tees
        
        2.3.3.2.(1)
      - 2.3.3.3. Prohibition of Welding of Pipes and Fittings
        
        2.3.3.3.(1)
        
        2.3.3.3.(2)
      - 2.3.3.4. Unions and Slip Joints
        
        2.3.3.4.(1)
        
        2.3.3.4.(2)
      - 2.3.3.5. Increaser or Reducer
        
        2.3.3.5.(1)
      - 2.3.3.6. Dissimilar Materials
        
        2.3.3.6.(1)
      - 2.3.3.7. Connection of Roof Drain to Leader
        
        2.3.3.7.(1)
      - 2.3.3.8. Connection of Floor Outlet Fixtures
        
        2.3.3.8.(1)
        
        2.3.3.8.(2)
        
        2.3.3.8.(3)
        
        2.3.3.8.(4)
        
        2.3.3.8.(5)
        
        2.3.3.8.(6)
      - 2.3.3.9. Expansion and Contraction
        
        2.3.3.9.(1)
      - 2.3.3.10. Copper Tube
        
        2.3.3.10.(1)
      - 2.3.3.11. Indirect Connections
        
        2.3.3.11.(1)
        
        2.3.3.11.(2)
      - 2.3.3.12. Copper Joints Used Underground
        
        2.3.3.12.(1)
        
        2.3.3.12.(2)
    - 2.3.4. Support of Piping
      - 2.3.4.1. Capability of Support
        
        2.3.4.1.(1)
        
        2.3.4.1.(2)
        
        2.3.4.1.(3)
      - 2.3.4.2. Independence of Support
        
        2.3.4.2.(1)
      - 2.3.4.3. Insulation of Support
        
        2.3.4.3.(1)
      - 2.3.4.4. Support for Vertical Piping
        
        2.3.4.4.(1)
        
        2.3.4.4.(2)
      - 2.3.4.5. Support for Horizontal Piping
        
        2.3.4.5.(1)
        
        2.3.4.5.(2)
        
        2.3.4.5.(3)
        
        2.3.4.5.(4)
        
        2.3.4.5.(5)
        
        2.3.4.5.(6)
      - 2.3.4.6. Support for Underground Horizontal Piping
        
        2.3.4.6.(1)
        
        2.3.4.6.(2)
      - 2.3.4.7. Support for Vent Pipe above a Roof
        
        2.3.4.7.(1)
    - 2.3.5. Protection of Piping
      - 2.3.5.1. Backfilling of Pipe Trench
        
        2.3.5.1.(1)
      - 2.3.5.2. Protection of Non-Metallic Pipe
        
        2.3.5.2.(1)
      - 2.3.5.3. Isolation from Loads
        
        2.3.5.3.(1)
      - 2.3.5.4. Protection from Frost
        
        2.3.5.4.(1)
      - 2.3.5.5. Protection from Mechanical Damage
        
        2.3.5.5.(1)
      - 2.3.5.6. Protection from Condensation
        
        2.3.5.6.(1)
    - 2.3.6. Testing of Drainage or Venting Systems
      - 2.3.6.1. Tests and Inspection of Drainage or Venting Systems
        
        2.3.6.1.(1)
        
        2.3.6.1.(2)
        
        2.3.6.1.(3)
        
        2.3.6.1.(4)
        
        2.3.6.1.(5)
      - 2.3.6.2. Tests of Pipes in Drainage Systems
        
        2.3.6.2.(1)
        
        2.3.6.2.(2)
      - 2.3.6.3. Tests of Venting Systems
        
        2.3.6.3.(1)
      - 2.3.6.4. Water Pressure Tests
        
        2.3.6.4.(1)
        
        2.3.6.4.(2)
      - 2.3.6.5. Air Pressure Tests
        
        2.3.6.5.(1)
      - 2.3.6.6. Final Tests
        
        2.3.6.6.(1)
        
        2.3.6.6.(2)
      - 2.3.6.7. Ball Tests
        
        2.3.6.7.(1)
        
        2.3.6.7.(2)
    - 2.3.7. Testing of Potable Water Systems
      - 2.3.7.1. Application of Tests
        
        2.3.7.1.(1)
        
        2.3.7.1.(2)
        
        2.3.7.1.(3)
        
        2.3.7.1.(4)
      - 2.3.7.2. Pressure Tests of Potable Water Systems
        
        2.3.7.2.(1)
        
        2.3.7.2.(2)
      - 2.3.7.3. Water Pressure Tests
        
        2.3.7.3.(1)
        
        2.3.7.3.(2)
  - Section 2.4. Drainage Systems
    - 2.4.1. Application
      - 2.4.1.1. General
        
        2.4.1.1.(1)
    - 2.4.2. Connections to Drainage Systems
      - 2.4.2.1. Connections to Sanitary Drainage Systems
        
        2.4.2.1.(1)
        
        2.4.2.1.(2)
        
        2.4.2.1.(3)
        
        2.4.2.1.(4)
        
        2.4.2.1.(5)
      - 2.4.2.2. Connection of Overflows from Rainwater Tanks
        
        2.4.2.2.(1)
      - 2.4.2.3. Direct Connections
        
        2.4.2.3.(1)
        
        2.4.2.3.(2)
        
        2.4.2.3.(3)
    - 2.4.3. Location of Fixtures
      - 2.4.3.1. Urinals
        
        2.4.3.1.(1)
      - 2.4.3.2. Restricted Locations of Indirect Connections and Traps
        
        2.4.3.2.(1)
      - 2.4.3.3. Equipment Restrictions Upstream of Grease Interceptors
        
        2.4.3.3.(1)
        
        2.4.3.3.(2)
      - 2.4.3.4. Fixtures Located in Chemical Storage Locations
        
        2.4.3.4.(1)
      - 2.4.3.5. Macerating Toilet Systems
        
        2.4.3.5.(1)
      - 2.4.3.6. Drains Serving Elevator Pits
        
        2.4.3.6.(1)
    - 2.4.4. Treatment of Sewage and Wastes
      - 2.4.4.1. Sewage Treatment
        
        2.4.4.1.(1)
      - 2.4.4.2. Cooling of Hot Water or Sewage
        
        2.4.4.2.(1)
      - 2.4.4.3. Interceptors
        
        2.4.4.3.(1)
        
        2.4.4.3.(2)
        
        2.4.4.3.(3)
        
        2.4.4.3.(4)
      - 2.4.4.4. Neutralizing and Dilution Tanks
        
        2.4.4.4.(1)
        
        2.4.4.4.(2)
    - 2.4.5. Traps
      - 2.4.5.1. Traps for Sanitary Drainage Systems
        
        2.4.5.1.(1)
        
        2.4.5.1.(2)
        
        2.4.5.1.(3)
        
        2.4.5.1.(4)
        
        2.4.5.1.(5)
        
        2.4.5.1.(6)
      - 2.4.5.2. Traps for Storm Drainage Systems
        
        2.4.5.2.(1)
        
        2.4.5.2.(2)
        
        2.4.5.2.(3)
      - 2.4.5.3. Connection of Subsoil Drainage Pipe to a Sanitary Drainage System
        
        2.4.5.3.(1)
      - 2.4.5.4. Location and Cleanout for Building Traps
        
        2.4.5.4.(1)
      - 2.4.5.5. Trap Seals
        
        2.4.5.5.(1)
    - 2.4.6. Arrangement of Drainage Piping
      - 2.4.6.1. Separate Systems
        
        2.4.6.1.(1)
        
        2.4.6.1.(2)
        
        2.4.6.1.(3)
      - 2.4.6.2. Location of Soil-or-Waste Pipes
        
        2.4.6.2.(1)
      - 2.4.6.3. Sumps or Tanks
        
        2.4.6.3.(1)
        
        2.4.6.3.(2)
        
        2.4.6.3.(3)
        
        2.4.6.3.(4)
        
        2.4.6.3.(5)
        
        2.4.6.3.(6)
        
        2.4.6.3.(7)
      - 2.4.6.4. Protection from Backflow
        
        2.4.6.4.(1)
        
        2.4.6.4.(2)
        
        2.4.6.4.(3)
        
        2.4.6.4.(4)
        
        2.4.6.4.(5)
        
        2.4.6.4.(6)
      - 2.4.6.5. Mobile Home Sewer Service
        
        2.4.6.5.(1)
    - 2.4.7. Cleanouts
      - 2.4.7.1. Cleanouts for Drainage Systems
        
        2.4.7.1.(1)
        
        2.4.7.1.(2)
        
        2.4.7.1.(3)
        
        2.4.7.1.(4)
        
        2.4.7.1.(5)
        
        2.4.7.1.(6)
        
        2.4.7.1.(7)
        
        2.4.7.1.(8)
        
        2.4.7.1.(9)
      - 2.4.7.2. Size and Spacing of Cleanouts
        
        2.4.7.2.(1)
        
        2.4.7.2.(2)
        
        2.4.7.2.(3)
        
        2.4.7.2.(4)
        
        2.4.7.2.(5)
      - 2.4.7.3. Manholes
        
        2.4.7.3.(1)
        
        2.4.7.3.(2)
        
        2.4.7.3.(3)
        
        2.4.7.3.(4)
      - 2.4.7.4. Location of Cleanouts
        
        2.4.7.4.(1)
        
        2.4.7.4.(2)
        
        2.4.7.4.(3)
        
        2.4.7.4.(4)
        
        2.4.7.4.(5)
    - 2.4.8. Minimum Slope and Length of Drainage Pipes
      - 2.4.8.1. Minimum Slope
        
        2.4.8.1.(1)
      - 2.4.8.2. Length of Fixture Outlet Pipes
        
        2.4.8.2.(1)
    - 2.4.9. Size of Drainage Pipes
      - 2.4.9.1. No Reduction in Size
        
        2.4.9.1.(1)
      - 2.4.9.2. Serving Water Closets
        
        2.4.9.2.(1)
        
        2.4.9.2.(2)
        
        2.4.9.2.(3)
        
        2.4.9.2.(4)
      - 2.4.9.3. Size of Fixture Outlet Pipes
        
        2.4.9.3.(1)
        
        2.4.9.3.(2)
        
        2.4.9.3.(3)
      - 2.4.9.4. Size of Building Drain and Building Sewer
        
        2.4.9.4.(1)
      - 2.4.9.5. Offset in Leaders
        
        2.4.9.5.(1)
        
        2.4.9.5.(2)
    - 2.4.10. Hydraulic Loads
      - 2.4.10.1. Total Load on a Pipe
        
        2.4.10.1.(1)
      - 2.4.10.2. Hydraulic Loads for Fixtures
        
        2.4.10.2.(1)
        
        2.4.10.2.(2)
      - 2.4.10.3. Hydraulic Loads from Fixtures with a Continuous Flow
        
        2.4.10.3.(1)
        
        2.4.10.3.(2)
      - 2.4.10.4. Hydraulic Loads from Roofs or Paved Surfaces
        
        2.4.10.4.(1)
        
        2.4.10.4.(2)
        
        2.4.10.4.(3)
        
        2.4.10.4.(4)
      - 2.4.10.5. Conversion of Fixture Units to Litres
        
        2.4.10.5.(1)
      - 2.4.10.6. Hydraulic Loads to Soil-or-Waste Pipes
        
        2.4.10.6.(1)
        
        2.4.10.6.(2)
      - 2.4.10.7. Hydraulic Loads on Branches
        
        2.4.10.7.(1)
      - 2.4.10.8. Hydraulic Loads on Sanitary Building Drains or Sewers
        
        2.4.10.8.(1)
      - 2.4.10.9. Hydraulic Loads on Storm or Combined Building Drains or Sewers
        
        2.4.10.9.(1)
      - 2.4.10.10. Hydraulic Loads to Roof Gutters
        
        2.4.10.10.(1)
      - 2.4.10.11. Hydraulic Loads on Leaders
        
        2.4.10.11.(1)
      - 2.4.10.12. Hydraulic Loads from Fixtures with a Semi-continuous Flow
        
        2.4.10.12.(1)
      - 2.4.10.13. Design of Storm Sewers
        
        2.4.10.13.(1)
  - Section 2.5. Venting Systems
    - 2.5.1. Vent Pipes for Traps
      - 2.5.1.1. Venting for Traps
        
        2.5.1.1.(1)
        
        2.5.1.1.(2)
        
        2.5.1.1.(3)
        
        2.5.1.1.(4)
    - 2.5.2. Wet Venting
      - 2.5.2.1. Wet Venting
        
        2.5.2.1.(1)
    - 2.5.3. Circuit Venting
      - 2.5.3.1. Circuit Venting
        
        2.5.3.1.(1)
        
        2.5.3.1.(2)
        
        2.5.3.1.(3)
        
        2.5.3.1.(4)
        
        2.5.3.1.(5)
        
        2.5.3.1.(6)
        
        2.5.3.1.(7)
        
        2.5.3.1.(8)
        
        2.5.3.1.(9)
        
        2.5.3.1.(10)
        
        2.5.3.1.(11)
    - 2.5.4. Vent Pipes for Soil-or-Waste Stacks
      - 2.5.4.1. Stack Vents
        
        2.5.4.1.(1)
      - 2.5.4.2. Vent Stacks
        
        2.5.4.2.(1)
        
        2.5.4.2.(2)
        
        2.5.4.2.(3)
        
        2.5.4.2.(4)
      - 2.5.4.3. Yoke Vents
        
        2.5.4.3.(1)
        
        2.5.4.3.(2)
        
        2.5.4.3.(3)
        
        2.5.4.3.(4)
      - 2.5.4.4. Offset Relief Vents
        
        2.5.4.4.(1)
      - 2.5.4.5. Fixtures Draining into Vent Pipes
        
        2.5.4.5.(1)
    - 2.5.5. Miscellaneous Vent Pipes
      - 2.5.5.1. Venting of Sewage Sumps
        
        2.5.5.1.(1)
      - 2.5.5.2. Venting of Oil Interceptors
        
        2.5.5.2.(1)
        
        2.5.5.2.(2)
        
        2.5.5.2.(3)
        
        2.5.5.2.(4)
        
        2.5.5.2.(5)
      - 2.5.5.3. Venting of Drain Piping and Dilution Tanks for Corrosive Waste
        
        2.5.5.3.(1)
      - 2.5.5.4. Fresh Air Inlets
        
        2.5.5.4.(1)
      - 2.5.5.5. Provision for Future Installations
        
        2.5.5.5.(1)
        
        2.5.5.5.(2)
    - 2.5.6. Arrangement of Vent Pipes
      - 2.5.6.1. Drainage of Vent Pipes
        
        2.5.6.1.(1)
      - 2.5.6.2. Vent Pipe Connections
        
        2.5.6.2.(1)
        
        2.5.6.2.(2)
        
        2.5.6.2.(3)
      - 2.5.6.3. Location of Vent Pipes
        
        2.5.6.3.(1)
        
        2.5.6.3.(2)
        
        2.5.6.3.(3)
        
        2.5.6.3.(4)
      - 2.5.6.4. Connection of Vents above Fixtures Served
        
        2.5.6.4.(1)
        
        2.5.6.4.(2)
      - 2.5.6.5. Terminals
        
        2.5.6.5.(1)
        
        2.5.6.5.(2)
        
        2.5.6.5.(3)
        
        2.5.6.5.(4)
        
        2.5.6.5.(5)
        
        2.5.6.5.(6)
    - 2.5.7. Minimum Size of Vent Pipes
      - 2.5.7.1. General
        
        2.5.7.1.(1)
      - 2.5.7.2. Size Restriction
        
        2.5.7.2.(1)
      - 2.5.7.3. Additional Circuit Vents and Relief Vents
        
        2.5.7.3.(1)
        
        2.5.7.3.(2)
      - 2.5.7.4. Offset Relief Vents
        
        2.5.7.4.(1)
      - 2.5.7.5. Yoke Vents
        
        2.5.7.5.(1)
      - 2.5.7.6. Vent Pipes for Manholes
        
        2.5.7.6.(1)
      - 2.5.7.7. Vents for Sewage Sumps, Dilution Tanks and Macerating Toilet Systems
        
        2.5.7.7.(1)
        
        2.5.7.7.(2)
        
        2.5.7.7.(3)
    - 2.5.8. Sizing of Vent Pipes
      - 2.5.8.1. Hydraulic Loads Draining to Wet Vents
        
        2.5.8.1.(1)
        
        2.5.8.1.(2)
      - 2.5.8.2. Individual Vents and Dual Vents
        
        2.5.8.2.(1)
        
        2.5.8.2.(2)
      - 2.5.8.3. Branch Vents, Vent Headers, Continuous Vents and Circuit Vents
        
        2.5.8.3.(1)
        
        2.5.8.3.(2)
        
        2.5.8.3.(3)
        
        2.5.8.3.(4)
        
        2.5.8.3.(5)
      - 2.5.8.4. Vent Stacks or Stack Vents
        
        2.5.8.4.(1)
        
        2.5.8.4.(2)
        
        2.5.8.4.(3)
        
        2.5.8.4.(4)
        
        2.5.8.4.(5)
      - 2.5.8.5. Lengths of Other Vent Pipes
        
        2.5.8.5.(1)
    - 2.5.9. Air Admittance Valves
      - 2.5.9.1. Air Admittance Valve as a Vent Terminal
        
        2.5.9.1.(1)
      - 2.5.9.2. Air Admittance Valves
        
        2.5.9.2.(1)
        
        2.5.9.2.(2)
      - 2.5.9.3. Installation Conditions
        
        2.5.9.3.(1)
        
        2.5.9.3.(2)
        
        2.5.9.3.(3)
        
        2.5.9.3.(4)
        
        2.5.9.3.(5)
  - Section 2.6. Potable Water Systems
    - 2.6.1. Arrangement of Piping
      - 2.6.1.1. Design
        
        2.6.1.1.(1)
        
        2.6.1.1.(2)
      - 2.6.1.2. Drainage
        
        2.6.1.2.(1)
      - 2.6.1.3. Shut-off Valves
        
        2.6.1.3.(1)
        
        2.6.1.3.(2)
        
        2.6.1.3.(3)
        
        2.6.1.3.(4)
        
        2.6.1.3.(5)
        
        2.6.1.3.(6)
        
        2.6.1.3.(7)
      - 2.6.1.4. Protection for Exterior Water Supply
        
        2.6.1.4.(1)
      - 2.6.1.5. Check Valves
        
        2.6.1.5.(1)
      - 2.6.1.6. Flushing Devices
        
        2.6.1.6.(1)
        
        2.6.1.6.(2)
      - 2.6.1.7. Relief Valves
        
        2.6.1.7.(1)
        
        2.6.1.7.(2)
        
        2.6.1.7.(3)
        
        2.6.1.7.(4)
        
        2.6.1.7.(5)
        
        2.6.1.7.(6)
        
        2.6.1.7.(7)
        
        2.6.1.7.(8)
        
        2.6.1.7.(9)
        
        2.6.1.7.(10)
      - 2.6.1.8. Solar Domestic Hot Water Systems
        
        2.6.1.8.(1)
      - 2.6.1.9. Water Hammer
        
        2.6.1.9.(1)
      - 2.6.1.10. Mobile Home Water Service
        
        2.6.1.10.(1)
      - 2.6.1.11. Thermal Expansion
        
        2.6.1.11.(1)
      - 2.6.1.12. Service Water Heaters
        
        2.6.1.12.(1)
    - 2.6.2. Protection from Contamination
      - 2.6.2.1. Connection of Systems
        
        2.6.2.1.(1)
        
        2.6.2.1.(2)
        
        2.6.2.1.(3)
      - 2.6.2.2. Back-Siphonage
        
        2.6.2.2.(1)
        
        2.6.2.2.(2)
      - 2.6.2.3. Backflow Caused by Back Pressure
        
        2.6.2.3.(1)
        
        2.6.2.3.(2)
        
        2.6.2.3.(3)
      - 2.6.2.4. Backflow from Fire Protection Systems
        
        2.6.2.4.(1)
        
        2.6.2.4.(2)
        
        2.6.2.4.(3)
        
        2.6.2.4.(4)
      - 2.6.2.5. Separation of Water Supply Systems
        
        2.6.2.5.(1)
      - 2.6.2.6. Premise Isolation
        
        2.6.2.6.(1)
      - 2.6.2.7. Hose Bibb
        
        2.6.2.7.(1)
      - 2.6.2.8. Cleaning of Systems
        
        2.6.2.8.(1)
      - 2.6.2.9. Air Gap
        
        2.6.2.9.(1)
        
        2.6.2.9.(2)
      - 2.6.2.10. Vacuum Breakers
        
        2.6.2.10.(1)
        
        2.6.2.10.(2)
        
        2.6.2.10.(3)
        
        2.6.2.10.(4)
      - 2.6.2.11. Tank-Type Water Closets
        
        2.6.2.11.(1)
      - 2.6.2.12. Backflow Preventers
        
        2.6.2.12.(1)
    - 2.6.3. Size and Capacity of Pipes
      - 2.6.3.1. Design, Fabrication and Installation
        
        2.6.3.1.(1)
        
        2.6.3.1.(2)
        
        2.6.3.1.(3)
      - 2.6.3.2. Hydraulic Load
        
        2.6.3.2.(1)
        
        2.6.3.2.(2)
        
        2.6.3.2.(3)
        
        2.6.3.2.(4)
      - 2.6.3.3. Static Pressure
        
        2.6.3.3.(1)
      - 2.6.3.4. Size
        
        2.6.3.4.(1)
        
        2.6.3.4.(2)
        
        2.6.3.4.(3)
        
        2.6.3.4.(4)
        
        2.6.3.4.(5)
      - 2.6.3.5. Velocity
        
        2.6.3.5.(1)
  - Section 2.7. Non-Potable Water Systems
    - 2.7.1. Connection
      - 2.7.1.1. Not Permitted
        
        2.7.1.1.(1)
    - 2.7.2. Identification
      - 2.7.2.1. Markings Required
        
        2.7.2.1.(1)
    - 2.7.3. Location
      - 2.7.3.1. Pipes
        
        2.7.3.1.(1)
      - 2.7.3.2. Outlets
        
        2.7.3.2.(1)
    - 2.7.4. Non-potable Water Systems
      - 2.7.4.1. Non-potable Water System Design
        
        2.7.4.1.(1)
        
        2.7.4.1.(2)

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Date modified:: 2020-04-16

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National Plumbing Code of Canada 2010 – Intent Statements

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