How often shall the priming water level in a supervised pre-action system be tested?

• A. Monthly
• B. Quarterly
• C. Semi annually
• D. Annually

Answer: (B)

Priming water level needs regular verification because the primed portion of a supervised pre-action system must stay water-filled to ensure immediate water delivery when the valve releases. Checking this level periodically catches losses due to small leaks, evaporation, or reservoir seepage before a demand occurs, keeping the system ready.

Testing it quarterly provides a practical balance between maintaining readiness and workload. If checked too rarely, small leaks could go undetected long enough to compromise performance; more frequent checks (monthly) are usually unnecessary unless there are known issues. The test involves inspecting the priming reservoir or chamber, confirming the water level is within the specified range, checking for leaks, and restoring or adjusting to the required level as needed.