During a fire pump test, which valve is inspected?

During a fire pump test, which valve is inspected?

• A. Post indicator valve
• B. Main pressure relief valve
• C. Butterfly valve
• D. Isolation valve

Answer: (B)

During a fire pump test, the priority is to protect the system from overpressure as the pump starts delivering water. The main pressure relief valve is designed to relieve excess pressure once the set limit is reached, preventing damage to the pump, piping, and sprinkler components. The test checks that this valve opens at the correct pressure, relieves properly, and reseats afterward, ensuring the system remains safe during high-demand conditions. Other valves serve different roles—post indicator valves show whether the main line is open or closed, while isolation and butterfly valves control or separate flow but do not provide the protective relief function needed during the test. Thus, inspecting the main pressure relief valve is essential.

During a fire pump test, the priority is to protect the system from overpressure as the pump starts delivering water. The main pressure relief valve is designed to relieve excess pressure once the set limit is reached, preventing damage to the pump, piping, and sprinkler components. The test checks that this valve opens at the correct pressure, relieves properly, and reseats afterward, ensuring the system remains safe during high-demand conditions. Other valves serve different roles—post indicator valves show whether the main line is open or closed, while isolation and butterfly valves control or separate flow but do not provide the protective relief function needed during the test. Thus, inspecting the main pressure relief valve is essential.