Plumbing Inspection Procedure

This checklist identifies the most common Ontario Building Code deficiencies found while performing plumbing roughin inspections. Use this checklist as a guide during construction, and reduce your costs associated with the repair of Building Code deficiencies.

Prior to calling for an inspection, verify that the relevant items have been completed satisfactorily. While some items may not apply to your project, please consider each one carefully. Indicate a check mark as completed or an x as not applicable.

Materials and Equipment

Improper pipe fittings in a drainage or venting system are not being used.
A double Y, double TY, TY or double waste fitting is not installed in a nominally horizontal soil or waste pipe.
Plastic pipe conforms to B181.1, B181.2, B182.1 or B182.2 when used underground outside a building, under a building for a drainage system or inside a building for a storm drainage system.
Plastic pipe conforms to B181.1 or B181.2 when used under a building or inside a building for a venting system.
PE/AL/PE pipe and fittings has not been used in a hot water potable water system.
PEX/AL/PEX pipe and fittings for use with potable water systems complies with B137.10.
Galvanized pipe has not been used in a water distribution system, except for repairs to existing galvanized piping systems.

Traps

Floor drains have trap seal primers from a permanent source
Floor drain installed in the basement.

Cleanouts

Cleanout for the building drain is accessible
Cleanout installed on fixture drain on the kitchen sink or removable trap installed.
Cleanout located at base of stacks

Slope and Length of Drainage Pipe

Minimum slope of 1 in 50 (2%) for pipe 3 inch or less.
Maximum length of fixture outlet pipe 2’-11”

Vent Pipes

Vent pipe of at least 1 ½” on each storey.
Sewage ejector is vented.
Vent pipe installed without sag and no open or unused ends. Is properly supported.
Except for a wet vent, a vent pipe is connected above horizontal centre line of soil or waste pipe.
Vent pipe connections above the flood level of the fixtures they serves.
Maximum 4’-11” from vent to trap weir
Vent terminates 2’-11” above and 11’-6” from windows, etc.

Fixtures and Appliances

Kitchen sink, lavatory, bathtub/shower stall and water closet installed.
Water closet securely attached to the floor and has a separate shut-off valve.
Hot water tank has a temperature and pressure relief valve, blow down pipe, shut-off valves, drain valve and maximum water temperature
Shower valves conform to CAN/CSAB125

Basement Rough-in Plumbing

All rough-in drainage and venting systems, for future bathroom or washroom installations, are sealed with a permanent cap.

This checklist identifies the most common Ontario Building Code deficiencies found while performing plumbing roughin inspections. Use this checklist as a guide during construction, and reduce your costs associated with the repair of Building Code deficiencies.

Prior to calling for an inspection, verify that the relevant items have been completed satisfactorily. While some items may not apply to your project, please consider each one carefully. Indicate a check mark as completed or an x as not applicable.

Materials and Equipment

Improper pipe fittings in a drainage or venting system are not being used.

A double Y, double TY, TY or double waste fitting is not installed in a nominally horizontal soil or waste pipe.

Plastic pipe conforms to B181.1, B181.2, B182.1 or B182.2 when used underground outside a building, under a building for a drainage system or inside a building for a storm drainage system.

Plastic pipe conforms to B181.1 or B181.2 when used under a building or inside a building for a venting system.

PE/AL/PE pipe and fittings has not been used in a hot water potable water system.

PEX/AL/PEX pipe and fittings for use with potable water systems complies with B137.10.

Galvanized pipe has not been used in a water distribution system, except for repairs to existing galvanized piping systems.

Piping and Valves

Support of ABS piping every 4 feet.

Slip joints have not been used in the venting or drainage system.

Connection of pipes with an increaser or reducer will permit drainage of system, except at exposed trap.

Allowance made for expansion of piping

Suitable air break indirect connections.

Vent pipe supported at roof termination.

Piping protected against freezing temperatures.

¾” pipe from building control valve to the first branch that supplies the water heater.

Backflow (vacuum breaker) preventer installed on all hose bibbs.

Backflow preventer, testable, installed on all supplies to a lawn sprinkler system.

Shower valves conform to CAN/CSAB125

Outside hose bibbs have an accessible stop and waste valve located inside the building.

Traps

Floor drains have trap seal primers from a permanent source

Floor drain installed in the basement.

Cleanouts

Cleanout for the building drain is accessible

Cleanout installed on fixture drain on the kitchen sink or removable trap installed.

Cleanout located at base of stacks

Slope and Length of Drainage Pipe

Minimum slope of 1 in 50 (2%) for pipe 3 inch or less.

Maximum length of fixture outlet pipe 2’-11”

Vent Pipes

Vent pipe of at least 1 ½” on each storey.

Sewage ejector is vented.

Vent pipe installed without sag and no open or unused ends. Is properly supported.

Except for a wet vent, a vent pipe is connected above horizontal centre line of soil or waste pipe.

Vent pipe connections above the flood level of the fixtures they serves.

Maximum 4’-11” from vent to trap weir

Vent terminates 2’-11” above and 11’-6” from windows, etc.

Fixtures and Appliances

Kitchen sink, lavatory, bathtub/shower stall and water closet installed.

Water closet securely attached to the floor and has a separate shut-off valve.

Hot water tank has a temperature and pressure relief valve, blow down pipe, shut-off valves, drain valve and maximum water temperature

Shower valves conform to CAN/CSAB125

Basement Rough-in Plumbing

All rough-in drainage and venting systems, for future bathroom or washroom installations, are sealed with a permanent cap.