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Backflow Prevention Device

Backflow Prevention Device

A backflow prevention device, also known as a check valve, non-return valve or one-way valve is a valve and type of mechanical device designed to permit the flow of a fluid (liquid or gas) in a single direction.

In fire safety, a backflow prevention device can form part of the water supply for an automatic fire sprinkler system, fire hydrant system, fire hose reel systems or fire pumpset system for a building.

An automatic fire sprinkler system alarm valve is a type of backflow prevention device.

References in Australian Standards

Rusty Sprinkler Pipe

According to Australian Standard AS 1851:2012 a the valve seat and gasket for a water supply non-return valve shall be inspected and renewed every five-years.


In preparing this definition, we have drawn from various sources including Legislation, Codes, Standards and industry information, research and knowledge.  Like the english language, these definitions may subtly change from time to time. As such these definitions are provided solely on the basis that users will be responsible for making their own assessment of the definition and and are advised to verify all relevant representations, statements and information.