The Ontario Building Code | Tests of Pipes in Drainage Systems
7.3.6.2. Tests of pipes in drainage Systems
(1) Every pipe in a drainage system, except an external leader or fixture outlet pipe, shall be capable of withstanding without leakage a water test, air test and final test.
In Plain Language
Except for specific exterior sections, every pipe in a drainage system must be tested, generally by a water test, air test, or another approved method, to confirm it doesn't leak.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.