How often should backflow preventers be tested?

Backflow preventers are critical devices used to prevent the reverse flow of contaminated water into the clean water supply. The recommended testing frequency is annually. This schedule ensures that backflow preventers are functioning correctly and maintaining their integrity to protect public health. Annual testing allows for regular maintenance, which can prevent potential failures that could lead to cross-contamination events.

Testing every year aligns with industry standards and local regulations in many jurisdictions, including Massachusetts. This measure is essential not only for detecting any wear or damage but also for verifying that the devices meet the necessary performance criteria. Regular annual checks can help anticipate any issues that may arise and ensure compliance with plumbing codes.

In contrast, some of the other options may suggest testing frequencies that are less consistent with best practices or regulatory requirements, thus potentially compromising the safety of the water supply. Regular and thorough annual testing is crucial for maintaining safe drinking water and protecting public health.