When the gauge reading drops and the differential pressure relief valve begins to discharge during an RP test, what is the next step?

When the gauge reading drops and the differential pressure relief valve begins to discharge during an RP test, what is the next step?

• A. Close all test cocks
• B. Record that the number 1 check valve is leaking
• C. Open the bleed valves
• D. Continue testing the assembly

Answer: (B)

When the gauge reading drops and the differential pressure relief valve begins to discharge during a reduced pressure (RP) test, the appropriate next step is to record that the number 1 check valve is leaking. This situation indicates that there is a failure in the first check valve, which is designed to prevent backflow into the potable water supply. When the differential pressure falls, it implies that the check valve is unable to hold back the pressure, allowing water to flow back, as evidenced by the discharge from the relief valve. By recording that the number 1 check valve is leaking, the technician is accurately documenting the issue that needs to be addressed, which can then trigger necessary repairs or replacements to ensure compliance and safety in the water system. Proper documentation at this stage is critical for future troubleshooting and service recommendations. In contrast, closing all test cocks would shut down the testing process prematurely, and opening bleed valves would not help diagnose the issue with the check valve. Continuing testing without addressing the leaking check valve could lead to further complications and does not resolve the immediate concern for the integrity of the backflow prevention system.

When the gauge reading drops and the differential pressure relief valve begins to discharge during a reduced pressure (RP) test, the appropriate next step is to record that the number 1 check valve is leaking. This situation indicates that there is a failure in the first check valve, which is designed to prevent backflow into the potable water supply. When the differential pressure falls, it implies that the check valve is unable to hold back the pressure, allowing water to flow back, as evidenced by the discharge from the relief valve.

By recording that the number 1 check valve is leaking, the technician is accurately documenting the issue that needs to be addressed, which can then trigger necessary repairs or replacements to ensure compliance and safety in the water system. Proper documentation at this stage is critical for future troubleshooting and service recommendations.

In contrast, closing all test cocks would shut down the testing process prematurely, and opening bleed valves would not help diagnose the issue with the check valve. Continuing testing without addressing the leaking check valve could lead to further complications and does not resolve the immediate concern for the integrity of the backflow prevention system.