The Ontario Building Code | Direct Flush Valves
7.2.10.8. Direct flush Valves
(1) Every direct flush valve shall,
(a) open fully and close positively under service pressure,
(b) complete its cycle of operation automatically,
(c) be provided with a means of regulating the volume of water that it discharges, and
(d) be provided with a vacuum breaker unless the fixtureis designed so that back-siphonage cannot occur.
In Plain Language
Every direct flush valve must open fully and close positively under service pressure, complete its operating cycle automatically, and include a means addressing the other performance requirements set out in this article.
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.