How often should backflow preventers be tested?

Backflow preventers are critical devices used in plumbing systems to prevent contaminated water from flowing back into the clean water supply. Testing these devices is crucial to ensure they function properly and maintain the integrity of the water supply.

The recommended practice is to test backflow preventers at least once a year. This annual testing ensures that the mechanism is working correctly, thereby protecting the public water supply from potential contaminants that could enter due to backflow. Regular testing allows for the identification of any issues or malfunctions that may not be immediately evident, ensuring timely maintenance or replacement if necessary.

In many jurisdictions, testing requirements are mandated by local plumbing codes or regulations, which often specify the annual testing frequency as a best practice for public health and safety.