What is the maximum time period between having a backflow device tested by a certified backflow tester?

What is the maximum time period between having a backflow device tested by a certified backflow tester?

• A. 6 months
• B. 1 year
• C. 2 years
• D. 3 years

Answer: (B)

Backflow prevention devices must be checked on a regular schedule by a certified tester to ensure they will shut off contaminated water from flowing back into the potable supply. The maximum interval allowed between tests is one year. This annual testing keeps any issues with the device—such as leaks, failed seals, or stuck valves—from going unnoticed long enough to pose a contamination risk. Testing every six months is stricter than typical requirements and not the standard maximum, while waiting two or three years would increase the chance that a failing device goes undetected, compromising safety.

Backflow prevention devices must be checked on a regular schedule by a certified tester to ensure they will shut off contaminated water from flowing back into the potable supply. The maximum interval allowed between tests is one year. This annual testing keeps any issues with the device—such as leaks, failed seals, or stuck valves—from going unnoticed long enough to pose a contamination risk. Testing every six months is stricter than typical requirements and not the standard maximum, while waiting two or three years would increase the chance that a failing device goes undetected, compromising safety.