How should you proceed if water continues to discharge from the sight tube on the #3 testcock when testing the #1 check valve of a double check valve assembly?

How should you proceed if water continues to discharge from the sight tube on the #3 testcock when testing the #1 check valve of a double check valve assembly?

• A. Replace the check valve
• B. Observe the reading and open the bleed valve on the #2 testcock
• C. Close the shut off valve
• D. Refill the system

Answer: (B)

It is important to observe the pressure reading in the context of backflow testing. When testing the #1 check valve of a double check valve assembly, water discharging from the sight tube indicates that there is likely an imbalance in pressure across the check valve. By observing the reading from the #1 testcock while simultaneously opening the bleed valve on the #2 testcock, you can relieve some pressure from the system, which may give a clearer indication of whether the check valve is functioning properly. This action allows you to assess if the #1 check valve is indeed sealing as it should without unnecessary pressure fluctuations that can affect the results of the test. This procedure is part of proper testing protocols to ensure that the backflow preventer is functioning correctly and can help identify any issues with the check valve itself while maintaining the integrity of the test.

It is important to observe the pressure reading in the context of backflow testing. When testing the #1 check valve of a double check valve assembly, water discharging from the sight tube indicates that there is likely an imbalance in pressure across the check valve.

By observing the reading from the #1 testcock while simultaneously opening the bleed valve on the #2 testcock, you can relieve some pressure from the system, which may give a clearer indication of whether the check valve is functioning properly. This action allows you to assess if the #1 check valve is indeed sealing as it should without unnecessary pressure fluctuations that can affect the results of the test.

This procedure is part of proper testing protocols to ensure that the backflow preventer is functioning correctly and can help identify any issues with the check valve itself while maintaining the integrity of the test.