Backflow preventers should be tested how often?

Backflow preventers should be tested how often?

• A. Monthly.
• B. Every six months.
• C. Annually.
• D. Annually, or according to local plumbing code requirements.

Answer: (D)

Regular testing intervals for backflow preventers are set by the local plumbing code because these devices must be checked to ensure they fully prevent backflow at all times. The standard practice is to test them annually to verify they operate correctly, seals hold, and no leaks or movement allow back-siphonage or back-pressure. However, some jurisdictions specify different intervals depending on the device type, the risk level, or specific local requirements. That’s why the best answer includes both the annual timing and the caveat that the exact schedule should follow local code. In short, you test once a year, unless the local plumbing code requires a different interval.

Regular testing intervals for backflow preventers are set by the local plumbing code because these devices must be checked to ensure they fully prevent backflow at all times. The standard practice is to test them annually to verify they operate correctly, seals hold, and no leaks or movement allow back-siphonage or back-pressure. However, some jurisdictions specify different intervals depending on the device type, the risk level, or specific local requirements. That’s why the best answer includes both the annual timing and the caveat that the exact schedule should follow local code. In short, you test once a year, unless the local plumbing code requires a different interval.