How often must a backflow preventer in a sprinkler system be tested?

The requirement to test a backflow preventer in a sprinkler system annually is based on ensuring the safety and reliability of the firefighting water source. Backflow preventers are critical components designed to prevent contaminated water from flowing back into the potable water supply. Testing them annually helps verify that they are functioning properly and still capable of preventing backflow, which is essential for public health and safety.

Regular testing allows for early detection of any functional issues that may arise due to wear and tear, debris accumulation, or other environmental factors, guaranteeing that the backflow preventer will effectively protect drinking water from contamination.

Other intervals such as every 6 months, every 2 years, or every 5 years do not align with the standard recommendations most commonly adopted in building codes and regulatory guidelines. By adhering to annual testing, authorities strive to ensure that all backflow prevention devices perform reliably throughout their operational life.