The Ontario Building Code | Sanitary Drainage Systems
7.1.5.1. sanitary Drainage Systems
(1) Every sanitary drainage system shall be connected to a public sanitary sewer, a public combined sewer or a private sewage disposal system.
(2) A combined building drain or a combined building sewer shall not be installed.
In Plain Language
Every sanitary drainage system must be connected to a public sanitary sewer, a public combined sewer, or a private sewage disposal system, ensuring wastewater always has an approved disposal pathway.
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.