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.
Only certify backflow assembly testers (BPATs) can test your backflow preventer
Health hazard backflow preventers are tested upon installation and at a minimum annually. Non-health hazard is tested upon installation, and after any modifications.
You must obtain an approved cost estimate by Utilities Engineering Division.