The Ontario Building Code | Air Admittance Valve as a Vent Terminal
7.5.9.1. Air Admittance Valve as a vent Terminal
(1) Individual ventsmay terminate with a connection to an air admittance valveas provided in Articles 7.5.9.2. and 7.5.9.3.
In Plain Language
An air admittance valve, a one-way mechanical valve that lets air in without needing a full vent stack to open air, may serve as a vent terminal under the conditions set out here.
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.