The Ontario Building Code | Air Tests
7.3.6.5. Air Tests
(1) Where an air test is made, it shall be conducted in accordance with the manufacturer’s instructions for the piping materials, and,
(a) air shall be forced into the system until a gauge pressure of 35 kPa is created, and
(b) this pressure shall be maintained for at least 15 min without a drop in pressure.
In Plain Language
Where an air test is used instead of a water test, it must follow the manufacturer's instructions for that piping material, with air forced into the system and pressure monitored to detect leaks.
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.