The Ontario Building Code | Tests and Inspection of Drainage or Venting Systems
7.3.6.1. Tests and Inspection of drainage or venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting Systems
(1) Except in the case of an external leader, after a section of drainage system or a venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting system has been roughed in, and before any fixture is installed or piping is covered, a water or an air test shall be conducted.
(2) Where a chief building official requires a final test, it shall be carried out after every fixtureis installed and before any part of the drainage systemor venting ="http://thehandyforce.com/interior/bathroom-renovations/" title ="Toronto Bathroom renovation inspiration">venting system is placed in operation.
(3) Where a prefabricated system is assembled off the building site in such a manner that it cannot be inspected and tested on site, off-site inspections and tests shall be conducted.
(4) Where a prefabricated system is installed as part of a drainage system and venting system, all other plumbing work shall be tested and inspected and a final test shall be carried out on the complete system.
(5) A ball test shall be carried out on a sanitary building drain, sanitary building sewer, storm building drain and a storm building sewer buried underground.
(6) A sewer lateral extension need not be tested and inspected if the sewer lateral extensionwas constructed, tested and inspected at the time of the installation of the public sewer.
In Plain Language
Drainage and venting systems must be tested and inspected as set out in this Subsection before they're covered up or put into use, catching leaks and defects while they're still easy to find and fix.
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.