: Stage 2 mandatory drought restrictions in effect. For additional information click 
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A backflow prevention assembly is a means or mechanism to prevent backflow. The basic means for preventing backflow is an air gap, which either eliminates a cross-connection or provides barrier from backflow. The basic mechanism for preventing backflow is a mechanical backflow preventer, which provides a physical barrier to backflow. The principal types of backflow preventers are the reduced-pressure principle assembly, the pressure vacuum breaker assembly and the double check valve assembly.
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Only certify backflow assembly testers (BPATs) can test your backflow preventer
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Health hazard backflow preventers are tested upon installation and at a minimum annually. Non-health hazard is tested upon installation, and after any modifications.
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You must obtain an approved cost estimate by Utilities Engineering Division.
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