The Ontario Building Code | Sewage Treatment
7.4.4.1. Sewage Treatment
(1) Where a fixture or equipment discharges sewage or waste that may damage or impair the sanitary drainage system or the functioning of a sanitary sewage works or sanitary sewage system, provision shall be made for treatment of the sewage or waste before it is discharged to the sanitary drainage system.
In Plain Language
Where a fixture or equipment discharges sewage or waste that could damage or impair the drainage system's function, that discharge must first be treated, protecting the piping and system downstream.
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.