In Plain Language

Factory-built water hammer arresters, devices that absorb the shock of suddenly closing valves, must conform to the referenced ANSI/ASSE standard for this equipment.

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.