8.3.1.2.Application

(1) Except as provided in Sentence (2), a Class 1 sewage system shall be designed to receive only human body waste for
     disposal.

     (2) Where the sewage system is specifically designed for the biological decomposition of non-waterborne biodegradable
     kitchen wastes or requires the addition of small quantities of plant matter to improve the decomposition of human body
     waste, it may receive such wastes in addition to human body waste.

     (3) Where the sewage system is designed with a drain for the removal of excess liquid, then the sewage system shall
     drain to a Class 3, 4, or 5 sewage system.

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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.