Who Is Required To Test and How Often?

Backflow prevention assemblies are to be tested annually or more often if requested by the Environmental Division.  The Cross Connection Program applies to and is primarily enforced on commercial businesses.  However, circumstances may apply that would require these devices to be installed on non-commercial properties.  It is recommended that when installed on residential properties that these devices be tested annually by a Certified Tester to ensure equipment performance.

What is Backpressure?

Backpressure is created when the pressure in a non-potable system, such as in a recirculation system containing soap, acid, antifreeze, or in a boiler system exceeds that in the potable water system that provides the make-up water to the system.  This pressure can force the potable water to reverse its direction of flow through the cross connection.  Non-potable substances can then enter the potable water system.

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