PART 7 — PLUMBINGUpdated for the 2024 Ontario Building Code
Try BUILDAiD Beta
7.5.4.4.Offset Relief Vents
(1) A stack that has a nominally horizontal offset more than 1.5 m long and above which the upper vertical portion of
the stack passes through more than 2 storeys and receives a hydraulic load of more than 100 fixture units shall be vented
by an offset relief vent connected to the vertical section immediately above the offset and by another offset relief vent
(a) connected to the lower vertical section at or above the highest sanitary drainage pipe connection, or
(b) extended as a vertical continuation of the lower section.
Understand this provision in seconds
BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.
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.