National Plumbing Code of Canada 2010 – Intent Statements
From: National Research Council Canada
Alternate format: National Plumbing Code of Canada 2010: Intent Statements (PDF, 0.6 MB)
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Table of contents
- 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
- Section 1.4. Terms and Abbreviations
- Part 2 - Objectives
- Section 2.2. Objectives
- 2.2.1. Objectives
- Section 2.2. Objectives
- Part 3 - Functional Statements
- Section 3.2. Functional Statements
- 3.2.1. Functional Statements
- Section 3.2. Functional Statements
- Part 1 - Compliance
- Division B Acceptable Solutions
- Part 2 - Plumbing Systems
- Section 2.1. General
- 2.1.1. Application
- 2.1.1.1. Application
- 2.1.2. Service Connections
- 2.1.2.1. Sanitary Drainage Systems
- 2.1.2.2. Storm Drainage Systems
- 2.1.2.3. Water Distribution Systems
- 2.1.2.4. Separate Services
- 2.1.3. Location of Fixtures
- 2.1.3.1. Lighting and Ventilation Requirements
- 2.1.3.2. Accessibility
- 2.1.1. Application
- Section 2.2. Materials and Equipment
- 2.2.1. General
- 2.2.1.1. Exposure of Materials
- 2.2.1.2. Restrictions on Re-Use
- 2.2.1.3. Identification
- 2.2.1.4. Pipe or Piping
- 2.2.1.5. Withstanding Pressure
- 2.2.1.6. Working Pressure of a Water Service Pipe
- 2.2.2. Fixtures
- 2.2.2.1. Surface Requirements
- 2.2.2.2. Conformance to Standards
- 2.2.2.3. Showers
- 2.2.2.4. Concealed Overflows
- 2.2.2.5. Water Closets in Public Washrooms
- 2.2.3. Traps and Interceptors
- 2.2.3.1. Traps
- 2.2.3.2. Interceptors
- 2.2.3.3. Tubular Traps
- 2.2.4. Pipe Fittings
- 2.2.4.1. T and Cross Fittings
- 2.2.4.2. Sanitary T Fittings
- 2.2.4.3. 90° Elbows
- 2.2.5. Non-Metallic Pipe and Fittings
- 2.2.5.1. Asbestos-Cement Drainage Pipe and Fittings
- 2.2.5.2. Asbestos-Cement Water Pipe and Fittings
- 2.2.5.3. Concrete Pipe and Fittings
- 2.2.5.4. Vitrified Clay Pipe and Fittings
- 2.2.5.5. Polyethylene Pipe and Fittings
- 2.2.5.6. Polyethylene Pipe Used Underground
- 2.2.5.7. Crosslinked Polyethylene Pipe and Fittings
- 2.2.5.8. PVC Pipe and Fittings
- 2.2.5.9. CPVC Pipe, Fittings and Solvent Cements
- 2.2.5.10. Plastic Pipe, Fittings and Solvent Cement Used Underground
- 2.2.5.11. Transition Solvent Cement
- 2.2.5.12. Plastic Pipe, Fittings and Solvent Cement Used in Buildings
- 2.2.5.13. Polyethylene/Aluminum/Polyethylene Composite Pipe and Fittings
- 2.2.5.14. Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Composite Pressure Pipe and Fittings
- 2.2.5.15. Polypropylene Pipe and Fittings
- 2.2.6. Ferrous Pipe and Fittings
- 2.2.6.1. Cast-Iron Drainage and Vent Pipe and Fittings
- 2.2.6.2. Cast-Iron Fittings for Asbestos-Cement Drainage Pipe
- 2.2.6.3. Threaded Cast-Iron Drainage Fittings
- 2.2.6.4. Cast-Iron Water Pipes
- 2.2.6.5. Screwed Cast-Iron Water Fittings
- 2.2.6.6. Screwed Malleable Iron Water Fittings
- 2.2.6.7. Steel Pipe
- 2.2.6.8. Corrugated Steel Pipe and Couplings
- 2.2.6.9. Sheet Metal Leaders
- 2.2.7. Non-Ferrous Pipe and Fittings
- 2.2.7.1. Copper and Brass Pipe
- 2.2.7.2. Brass or Bronze Pipe Flanges and Flanged Fittings
- 2.2.7.3. Brass or Bronze Threaded Water Fittings
- 2.2.7.4. Copper Tube
- 2.2.7.5. Solder-Joint Drainage Fittings
- 2.2.7.6. Solder-Joint Water Fittings
- 2.2.7.7. Flared-Joint Fittings for Copper Water Systems
- 2.2.7.8. Lead Waste Pipe and Fittings
- 2.2.8. Corrosion-Resistant Materials
- 2.2.8.1. Pipes and Fittings
- 2.2.9. Jointing Materials
- 2.2.9.1. Cement Mortar
- 2.2.9.2. Solders and Fluxes
- 2.2.10. Miscellaneous Materials
- 2.2.10.1. Brass Floor Flanges
- 2.2.10.2. Screws, Bolts, Nuts and Washers
- 2.2.10.3. Cleanout Fittings
- 2.2.10.4. Mechanical Couplings
- 2.2.10.5. Saddle Hubs
- 2.2.10.6. Supply and Waste Fittings
- 2.2.10.7. Water Temperature Control
- 2.2.10.8. Direct Flush Valves
- 2.2.10.9. Drinking Fountain Bubblers
- 2.2.10.10. Back-Siphonage Preventers and Backflow Preventers
- 2.2.10.11. Relief Valves
- 2.2.10.12. Reducing Valves
- 2.2.10.13. Solar Domestic Hot Water
- 2.2.10.14. Vent Pipe Flashing
- 2.2.10.15. Water Hammer Arresters
- 2.2.10.16. Air Admittance Valves
- 2.2.1. General
- Section 2.3. Piping
- 2.3.1. Application
- 2.3.1.1. General
- 2.3.2. Construction and Use of Joints
- 2.3.2.1. Caulked Lead Drainage Joints
- 2.3.2.2. Wiped Joints
- 2.3.2.3. Screwed Joints
- 2.3.2.4. Soldered Joints
- 2.3.2.5. Flared Joints
- 2.3.2.6. Mechanical Joints
- 2.3.2.7. Cold-Caulked Joints
- 2.3.3. Joints and Connections
- 2.3.3.1. Drilled and Tapped Joints
- 2.3.3.2. Extracted Tees
- 2.3.3.3. Prohibition of Welding of Pipes and Fittings
- 2.3.3.4. Unions and Slip Joints
- 2.3.3.5. Increaser or Reducer
- 2.3.3.6. Dissimilar Materials
- 2.3.3.7. Connection of Roof Drain to Leader
- 2.3.3.8. Connection of Floor Outlet Fixtures
- 2.3.3.9. Expansion and Contraction
- 2.3.3.10. Copper Tube
- 2.3.3.11. Indirect Connections
- 2.3.3.12. Copper Joints Used Underground
- 2.3.4. Support of Piping
- 2.3.4.1. Capability of Support
- 2.3.4.2. Independence of Support
- 2.3.4.3. Insulation of Support
- 2.3.4.4. Support for Vertical Piping
- 2.3.4.5. Support for Horizontal Piping
- 2.3.4.6. Support for Underground Horizontal Piping
- 2.3.4.7. Support for Vent Pipe above a Roof
- 2.3.5. Protection of Piping
- 2.3.5.1. Backfilling of Pipe Trench
- 2.3.5.2. Protection of Non-Metallic Pipe
- 2.3.5.3. Isolation from Loads
- 2.3.5.4. Protection from Frost
- 2.3.5.5. Protection from Mechanical Damage
- 2.3.5.6. Protection from Condensation
- 2.3.6. Testing of Drainage or Venting Systems
- 2.3.6.1. Tests and Inspection of Drainage or Venting Systems
- 2.3.6.2. Tests of Pipes in Drainage Systems
- 2.3.6.3. Tests of Venting Systems
- 2.3.6.4. Water Pressure Tests
- 2.3.6.5. Air Pressure Tests
- 2.3.6.6. Final Tests
- 2.3.6.7. Ball Tests
- 2.3.7. Testing of Potable Water Systems
- 2.3.7.1. Application of Tests
- 2.3.7.2. Pressure Tests of Potable Water Systems
- 2.3.7.3. Water Pressure Tests
- 2.3.1. Application
- Section 2.4. Drainage Systems
- 2.4.1. Application
- 2.4.1.1. General
- 2.4.2. Connections to Drainage Systems
- 2.4.2.1. Connections to Sanitary Drainage Systems
- 2.4.2.2. Connection of Overflows from Rainwater Tanks
- 2.4.2.3. Direct Connections
- 2.4.3. Location of Fixtures
- 2.4.3.1. Urinals
- 2.4.3.2. Restricted Locations of Indirect Connections and Traps
- 2.4.3.3. Equipment Restrictions Upstream of Grease Interceptors
- 2.4.3.4. Fixtures Located in Chemical Storage Locations
- 2.4.3.5. Macerating Toilet Systems
- 2.4.3.6. Drains Serving Elevator Pits
- 2.4.4. Treatment of Sewage and Wastes
- 2.4.4.1. Sewage Treatment
- 2.4.4.2. Cooling of Hot Water or Sewage
- 2.4.4.3. Interceptors
- 2.4.4.4. Neutralizing and Dilution Tanks
- 2.4.5. Traps
- 2.4.5.1. Traps for Sanitary Drainage Systems
- 2.4.5.2. Traps for Storm Drainage Systems
- 2.4.5.3. Connection of Subsoil Drainage Pipe to a Sanitary Drainage System
- 2.4.5.4. Location and Cleanout for Building Traps
- 2.4.5.5. Trap Seals
- 2.4.6. Arrangement of Drainage Piping
- 2.4.6.1. Separate Systems
- 2.4.6.2. Location of Soil-or-Waste Pipes
- 2.4.6.3. Sumps or Tanks
- 2.4.6.4. Protection from Backflow
- 2.4.6.5. Mobile Home Sewer Service
- 2.4.7. Cleanouts
- 2.4.7.1. Cleanouts for Drainage Systems
- 2.4.7.2. Size and Spacing of Cleanouts
- 2.4.7.3. Manholes
- 2.4.7.4. Location of Cleanouts
- 2.4.8. Minimum Slope and Length of Drainage Pipes
- 2.4.8.1. Minimum Slope
- 2.4.8.2. Length of Fixture Outlet Pipes
- 2.4.9. Size of Drainage Pipes
- 2.4.9.1. No Reduction in Size
- 2.4.9.2. Serving Water Closets
- 2.4.9.3. Size of Fixture Outlet Pipes
- 2.4.9.4. Size of Building Drain and Building Sewer
- 2.4.9.5. Offset in Leaders
- 2.4.10. Hydraulic Loads
- 2.4.10.1. Total Load on a Pipe
- 2.4.10.2. Hydraulic Loads for Fixtures
- 2.4.10.3. Hydraulic Loads from Fixtures with a Continuous Flow
- 2.4.10.4. Hydraulic Loads from Roofs or Paved Surfaces
- 2.4.10.5. Conversion of Fixture Units to Litres
- 2.4.10.6. Hydraulic Loads to Soil-or-Waste Pipes
- 2.4.10.7. Hydraulic Loads on Branches
- 2.4.10.8. Hydraulic Loads on Sanitary Building Drains or Sewers
- 2.4.10.9. Hydraulic Loads on Storm or Combined Building Drains or Sewers
- 2.4.10.10. Hydraulic Loads to Roof Gutters
- 2.4.10.11. Hydraulic Loads on Leaders
- 2.4.10.12. Hydraulic Loads from Fixtures with a Semi-continuous Flow
- 2.4.10.13. Design of Storm Sewers
- 2.4.1. Application
- Section 2.5. Venting Systems
- 2.5.1. Vent Pipes for Traps
- 2.5.1.1. Venting for Traps
- 2.5.2. Wet Venting
- 2.5.2.1. Wet Venting
- 2.5.3. Circuit Venting
- 2.5.3.1. Circuit Venting
- 2.5.4. Vent Pipes for Soil-or-Waste Stacks
- 2.5.4.1. Stack Vents
- 2.5.4.2. Vent Stacks
- 2.5.4.3. Yoke Vents
- 2.5.4.4. Offset Relief Vents
- 2.5.4.5. Fixtures Draining into Vent Pipes
- 2.5.5. Miscellaneous Vent Pipes
- 2.5.5.1. Venting of Sewage Sumps
- 2.5.5.2. Venting of Oil Interceptors
- 2.5.5.3. Venting of Drain Piping and Dilution Tanks for Corrosive Waste
- 2.5.5.4. Fresh Air Inlets
- 2.5.5.5. Provision for Future Installations
- 2.5.6. Arrangement of Vent Pipes
- 2.5.6.1. Drainage of Vent Pipes
- 2.5.6.2. Vent Pipe Connections
- 2.5.6.3. Location of Vent Pipes
- 2.5.6.4. Connection of Vents above Fixtures Served
- 2.5.6.5. Terminals
- 2.5.7. Minimum Size of Vent Pipes
- 2.5.7.1. General
- 2.5.7.2. Size Restriction
- 2.5.7.3. Additional Circuit Vents and Relief Vents
- 2.5.7.4. Offset Relief Vents
- 2.5.7.5. Yoke Vents
- 2.5.7.6. Vent Pipes for Manholes
- 2.5.7.7. Vents for Sewage Sumps, Dilution Tanks and Macerating Toilet Systems
- 2.5.8. Sizing of Vent Pipes
- 2.5.8.1. Hydraulic Loads Draining to Wet Vents
- 2.5.8.2. Individual Vents and Dual Vents
- 2.5.8.3. Branch Vents, Vent Headers, Continuous Vents and Circuit Vents
- 2.5.8.4. Vent Stacks or Stack Vents
- 2.5.8.5. Lengths of Other Vent Pipes
- 2.5.9. Air Admittance Valves
- 2.5.9.1. Air Admittance Valve as a Vent Terminal
- 2.5.9.2. Air Admittance Valves
- 2.5.9.3. Installation Conditions
- 2.5.1. Vent Pipes for Traps
- Section 2.6. Potable Water Systems
- 2.6.1. Arrangement of Piping
- 2.6.1.1. Design
- 2.6.1.2. Drainage
- 2.6.1.3. Shut-off Valves
- 2.6.1.4. Protection for Exterior Water Supply
- 2.6.1.5. Check Valves
- 2.6.1.6. Flushing Devices
- 2.6.1.7. Relief Valves
- 2.6.1.8. Solar Domestic Hot Water Systems
- 2.6.1.9. Water Hammer
- 2.6.1.10. Mobile Home Water Service
- 2.6.1.11. Thermal Expansion
- 2.6.1.12. Service Water Heaters
- 2.6.2. Protection from Contamination
- 2.6.2.1. Connection of Systems
- 2.6.2.2. Back-Siphonage
- 2.6.2.3. Backflow Caused by Back Pressure
- 2.6.2.4. Backflow from Fire Protection Systems
- 2.6.2.5. Separation of Water Supply Systems
- 2.6.2.6. Premise Isolation
- 2.6.2.7. Hose Bibb
- 2.6.2.8. Cleaning of Systems
- 2.6.2.9. Air Gap
- 2.6.2.10. Vacuum Breakers
- 2.6.2.11. Tank-Type Water Closets
- 2.6.2.12. Backflow Preventers
- 2.6.3. Size and Capacity of Pipes
- 2.6.3.1. Design, Fabrication and Installation
- 2.6.3.2. Hydraulic Load
- 2.6.3.3. Static Pressure
- 2.6.3.4. Size
- 2.6.3.5. Velocity
- 2.6.1. Arrangement of Piping
- Section 2.7. Non-Potable Water Systems
- 2.7.1. Connection
- 2.7.1.1. Not Permitted
- 2.7.2. Identification
- 2.7.2.1. Markings Required
- 2.7.3. Location
- 2.7.3.1. Pipes
- 2.7.3.2. Outlets
- 2.7.4. Non-potable Water Systems
- 2.7.4.1. Non-potable Water System Design
- 2.7.1. Connection
- Section 2.1. General
- Part 2 - Plumbing Systems