Why must backflow preventers be tested at least once annually?
Mechanical backflow preventers have internal seals, springs, and moving parts that are subject to fouling, wear, or fatigue. Also, mechanical backflow preventers and air gaps can be bypassed. Therefore, all backflow preventers are tested periodically to ensure they are functioning properly. The customer is responsible for testing of backflow devices. CUD will send a letter and list of approved testers to customers when their devices are due for testing. The testers must be state certified and approved by Consolidated Utility District’s Cross Connection Coordinator or the tests will not be accepted.
