Browse OBC — Part 7 — Plumbing
OBC data status
Content on this site is based on the Ontario Building Code, Ontario Regulation 5/25, as published on e-Laws and last updated January 16, 2025. This site includes excerpts from Division B — Parts 1, 3–12 only. Division A, Division C, and the Appendices are not included.
Articles
261 results
- 7.1.1.1 — Scope
- 7.1.2.1 — Application
- 7.1.3.1 — Definitions
- 7.1.4.1 — Facilities Required
- 7.1.4.2 — Floor Drains
- 7.1.5.1 — Sanitary Drainage Systems
- 7.1.5.2 — Storm Drainage Systems
- 7.1.5.3 — Water Distribution Systems
- 7.1.5.4 — Separate Services
- 7.1.5.5 — Private Sewers and Private Water Supply
- 7.1.6.1 — Lighting and Ventilation Requirements
- 7.1.6.2 — Accessibility
- 7.1.7.1 — Structural Movement
- 7.2.1.1 — Exposure of Materials
- 7.2.1.2 — Restrictions on Re-Use
- 7.2.1.3 — Identification and Certification
- 7.2.1.4 — Pipe or Piping
- 7.2.1.5 — Withstanding Pressure
- 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
- 7.2.3.1 — Traps
- 7.2.3.2 — Interceptors
- 7.2.3.3 — Tubular Traps
- 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
- 7.2.5.1 — Reserved
- 7.2.5.2 — Reserved
- 7.2.5.3 — Concrete Pipe and Fittings
- 7.2.5.4 — Vitrified Clay Pipe and Fittings
- 7.2.5.5 — Polyethylene Pipe and Fittings
- 7.2.5.6 — Polyethylene Pipe Used Underground
- 7.2.5.7 — Crosslinked Polyethylene Pipe and Fittings
- 7.2.5.8 — PVC Pipe and Fittings
- 7.2.5.9 — CPVC Pipe, Fittings and Solvent Cements
- 7.2.5.10 — Plastic Pipe, Fittings and Solvent Cement Used Underground
- 7.2.5.11 — Transition Solvent Cement
- 7.2.5.12 — Plastic Pipe, Fittings and Solvent Cement Used in Buildings
- 7.2.5.13 — Polyethylene/Aluminum/Polyethylene Composite Pipe and Fittings
- 7.2.5.14 — Crosslinked Polyethylene/Aluminum/Polyethylene Composite Pipe and Fittings
- 7.2.5.15 — Polypropylene Pipe and Fittings
- 7.2.6.1 — Cast Iron Frames, Covers, Drainage and Vent Pipe and Fittings
- 7.2.6.2 — Reserved
- 7.2.6.3 — Threaded Cast Iron Drainage Fittings
- 7.2.6.4 — Cast Iron Water Pipe
- 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
- 7.2.7.1 — 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
- 7.2.8.1 — Pipe and Fittings
- 7.2.9.1 — Cement-Mortar
- 7.2.9.2 — Solder and Fluxes
- 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 — Supply and Waste Fittings
- 7.2.10.7 — Linings and Coatings of Domestic Water 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
- 7.2.11.1 — 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
- 7.3.1.1 — Application
- 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
- 7.3.3.1 — Drilled and Tapped Joints
- 7.3.3.2 — Reserved
- 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 — Connection of Dissimilar Materials
- 7.3.3.7 — Connection of Roof Drain to Leader
- 7.3.3.8 — Connection of Floor 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
- 7.3.4.1 — 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
- 7.3.5.1 — Backfill of Pipe Trench
- 7.3.5.2 — Protection of Non-Metallic Pipe
- 7.3.5.3 — Isolation from Loads
- 7.3.5.4 — Protection from Frost
- 7.3.5.5 — Protection from Mechanical Damage
- 7.3.5.6 — Protection from Condensation
- 7.3.5.7 — Spatial Separation
- 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 Tests in Drain, Waste and Vent Systems
- 7.3.6.5 — Air Tests
- 7.3.6.6 — Final Tests
- 7.3.6.7 — Ball Tests
- 7.3.7.1 — Application of Tests
- 7.3.7.2 — Tests of Potable Water Systems
- 7.3.7.3 — Water Tests
- 7.4.1.1 — Application of 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
- 7.4.3.1 — Plumbing Fixtures
- 7.4.3.2 — Restricted Locations of Indirect Connections and Traps
- 7.4.3.3 — Equipment Restrictions Upstream of 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
- 7.4.4.1 — Sewage Treatment
- 7.4.4.2 — Protection for Drainage System
- 7.4.4.3 — Interceptors
- 7.4.4.4 — Neutralizing and Dilution Tanks
- 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
- 7.4.6.1 — Separate Systems
- 7.4.6.2 — Location of Soil or Waste 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
- 7.4.7.1 — 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
- 7.4.8.1 — Minimum Slope
- 7.4.8.2 — Length of Fixture Outlet 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 Drains and Sewers
- 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 Continuous or Semi-continuous Flow
- 7.4.10.4 — Hydraulic Loads from Roofs or Paved Surfaces
- 7.4.10.5 — Conversion of Fixture Units to Litres and Gal/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 Horizontal Drain
- 7.4.10.9 — Hydraulic Loads on Horizontal Storm Drains
- 7.4.10.10 — Rain Leaders
- 7.5.1.1 — Venting for Traps
- 7.5.2.1 — Wet Venting
- 7.5.3.1 — Circuit Venting
- 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
- 7.5.5.1 — Venting of Sanitary Sewage Sumps
- 7.5.5.2 — Venting of Interceptors
- 7.5.5.3 — Venting of Corrosive Drain Piping and Dilution Tanks
- 7.5.5.4 — Fresh Air Inlets
- 7.5.5.5 — Provision for Future Installations
- 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
- 7.5.7.1 — 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 Sanitary Sewage Sumps or Tanks, Dilution Tanks and Macerating Toilet Systems
- 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, Headers, Continuous Vents and Circuit Vents
- 7.5.8.4 — Vent Stacks, or Stack Vents
- 7.5.8.5 — Lengths for other Vent Pipes
- 7.5.9.1 — Air Admittance Valve as a Vent Terminal
- 7.5.9.2 — Air Admittance Valves
- 7.5.9.3 — Installation Conditions
- 7.6.1.1 — Design
- 7.6.1.2 — Drainage
- 7.6.1.3 — Control and Shut-off Valves
- 7.6.1.4 — Shut-off Valves
- 7.6.1.5 — Water Closets
- 7.6.1.6 — Suites
- 7.6.1.7 — Public Washrooms
- 7.6.1.8 — Tanks
- 7.6.1.9 — Protection for Exterior Water Supply
- 7.6.1.10 — Check Valves
- 7.6.1.11 — Flushing Devices
- 7.6.1.12 — Relief Valves
- 7.6.1.13 — Solar Domestic Hot Water Systems
- 7.6.1.14 — Water Hammer
- 7.6.1.15 — Mobile Home Water Service
- 7.6.1.16 — Thermal Expansion
- 7.6.2.1 — Connection of Systems
- 7.6.2.2 — Back-Siphonage
- 7.6.2.3 — Protection from Backflow
- 7.6.2.4 — Backflow from Fire Protection Systems
- 7.6.2.5 — Backflow from Buildings with a Solar Domestic Hot Water System
- 7.6.2.6 — Premise Isolation
- 7.6.2.7 — Reserved
- 7.6.2.8 — Cleaning of Systems
- 7.6.2.9 — Air Gap
- 7.6.2.10 — Vacuum Breakers and Flood Levels
- 7.6.3.1 — Design, Construction and Installation
- 7.6.3.2 — Hydraulic Load
- 7.6.3.3 — Static Pressure
- 7.6.3.4 — Size
- 7.6.3.5 — Velocity
- 7.6.4.1 — Water Supply Fittings
- 7.6.4.2 — Plumbing Fixtures
- 7.6.5.1 — Maximum Temperature of Hot Water
- 7.6.5.2 — Showers
- 7.6.5.3 — Temperature Control Devices
- 7.7.1.1 — Non-Potable Connection
- 7.7.2.1 — Markings Required
- 7.7.3.1 — Pipes
- 7.7.3.2 — Outlets
- 7.7.4.1 — Conformance to Standards