PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
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7.5.4.3.Yoke Vents
(1) Except as provided in Sentence (4), where a stack receives the discharge from fixtures located on more than 11
storeys, a yoke vent shall be installed
(a) for each section of 5 storeys or part of them counted from the top down, and
(b) at or immediately above each offset or double offset.
(2) The yoke vent shall be connected to the stack by means of a drainage fitting at or immediately below the lowest
sanitary drainage pipe from the lowest storey of the sections described in Sentence (1).
(3) The yoke vent shall connect to the vent stack at least 1 m above the floor level of the lowest storey in the section
described in Sentence (1).
(4) A yoke vent need not be installed provided the stack is interconnected with the vent stack in each storey of the section
in which fixtures are located by means of a vent pipe equal in nominal pipe size to the branch or fixture drain or NPS 2,
whichever is smaller.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.