PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
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7.4.7.3.Manholes
(1) A manhole, including the cover shall be designed to support all loads imposed upon it.
(2) A manhole shall be provided with
(a) a cover that provides an airtight seal if located within a building,
(b) a rigid ladder of a corrosion-resistant material where the depth exceeds 1 m, and
(c) a vent to the exterior if the manhole is located within a building.
(3) A manhole shall have a minimum horizontal dimension of 1.2 m, except that the top 1.5 m may be tapered from
1.2 m down to a minimum of 600 mm at the top.
(4) A manhole in a sanitary drainage system shall be channeled to direct the flow of effluent.
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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.