What must be done to backflow preventers according to UPC?

Backflow preventers are critical devices in plumbing systems that help protect the potable water supply from contamination due to backflow. According to the Uniform Plumbing Code (UPC), it is essential to ensure that these devices function correctly; therefore, they require annual testing. This testing verifies that the backflow preventer is operating properly and effectively preventing any backflow of potentially contaminated water into the drinking water system.

Annual testing is mandated because backflow preventers can wear out, become damaged, or fail for various reasons, and regular checks are necessary to maintain their reliability and effectiveness. The testing process typically involves evaluating the device under different conditions to ensure it meets established performance standards. This proactive approach helps ensure the safety of the drinking water and reduces the risk of public health issues.

Visual inspections are important, but they are not a substitute for the comprehensive evaluation provided by annual testing. Routine visual checks may not uncover more serious internal issues that could compromise the function of the backflow preventer, hence the necessity of formal annual testing by qualified professionals.