The Ontario Building Code | Venting of Interceptors

7.5.5.2. venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting of Interceptors

(1) Every oil interceptor shall be provided with 2 vent pipes that,

(a) connect to the interceptor at opposite ends,

(b) extend independently to open air,

(c) terminate not less than 2 000 mm above ground and at elevations differing by at least 300 mm, and

(d) do not connect to each other or any other vent pipe.

(2) Adjacent compartments within every oil interceptorshall be connected to each other by a vent opening.

(3) Where a secondary receiver for oil is installed in conjunction with an oil interceptor, it shall be vented in accordance with the manufacturer's recommendations, and the vent pipe shall,

(a) in no case be less than 1 ½ in. insize,

(b) extend independently to open air, and

(c) terminate not less than 2 000 mm above ground.

(4) The vent pipes referred to in Sentence (1) are permitted to be one size smaller than the largest connected drainage pipe but not less than 1 ¼ in. in size, or can be sized in accordance with the manufacturer’s recommendations.

(5) Every vent pipe that serves an oil or grease interceptor and is located outside a building shall be not less than 3 in. in size in areas where it may be subject to frost closure.

(6) Every grease interceptor shall have a vent pipe that is not less than 1 ½ in. in size connected to the outlet pipe, that connects to the plumbing venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting system.

(7) A vent pipe shall be provided within 1 500 mm of the inlet to a grease interceptorcomplete with a cleanout to provide cleaning of thevent pipe.

(8) Where an acid waste dilution tank is installed, it shall be provided with a vent pipe connected at the top of the tank and that is sized in accordance with Article 7.5.7.7.