Pressure gauges for a wet pipe system are typically installed on which valve to monitor system pressure?

Pressure gauges for a wet pipe system are typically installed on which valve to monitor system pressure?

• A. Alarm Check
• B. Main Drain
• C. Isolation Valve
• D. Water Motor Gong

Answer: (A)

The pressure gauge is placed on the alarm check valve. In a wet pipe fire sprinkler system, this valve sits on the water supply line and is a convenient, representative point to monitor the system’s normal operating pressure. It also serves to prevent backflow and to trigger the fire alarm when water moves, so having a gauge there lets you verify that the system is properly pressurized. Other options aren’t used for continuous pressure monitoring: the main drain is mainly for draining or testing pressure after depressurizing the system; the isolation valve is for shutting off a section or zone; and the water motor gong is an audible alarm device that sounds when water flows, not a pressure-reading point.

The pressure gauge is placed on the alarm check valve. In a wet pipe fire sprinkler system, this valve sits on the water supply line and is a convenient, representative point to monitor the system’s normal operating pressure. It also serves to prevent backflow and to trigger the fire alarm when water moves, so having a gauge there lets you verify that the system is properly pressurized.

Other options aren’t used for continuous pressure monitoring: the main drain is mainly for draining or testing pressure after depressurizing the system; the isolation valve is for shutting off a section or zone; and the water motor gong is an audible alarm device that sounds when water flows, not a pressure-reading point.