When the gauge near the compressor reads higher than the gauge near the dry pipe valve, the air line shall be what?

When the gauge near the compressor reads higher than the gauge near the dry pipe valve, the air line shall be what?

• A. Taken out of service
• B. Repaired and returned to service
• C. Isolated from the system
• D. Retested for leakage

Answer: (A)

When the pressure at the supply side is higher than the pressure at the dry pipe valve, it indicates a loss of pressure along the air line, most likely from a leak. The correct action is to take that air line out of service to stop pressurizing a line that isn’t holding pressure and to prevent uncontrolled or unexpected valve operation while the leak is located and repaired. After isolating, the line can be repaired and then returned to service with appropriate leakage checks.

When the pressure at the supply side is higher than the pressure at the dry pipe valve, it indicates a loss of pressure along the air line, most likely from a leak. The correct action is to take that air line out of service to stop pressurizing a line that isn’t holding pressure and to prevent uncontrolled or unexpected valve operation while the leak is located and repaired. After isolating, the line can be repaired and then returned to service with appropriate leakage checks.