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Your requirements are based on the level of risk for your property. See below a general backflow requirements guide of risk level.
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To speak with your local Backflow Prevention specialist about your backflow prevention requirements, find and contact them here.
Backflow is the unintended flow of water from any domestic, industrial or institutional piping system into a drinking water supply system. It can be caused by a loss of pressure in the drinking water supply main or by the flow from a pressurised system through an unprotected cross connection.
8615510865705 
8615510865705