Which pressure range defines a normal pressure pump?

• A. Less than 500 psi
• B. 500-1100 psi
• C. 1100 psi or greater
• D. 120-130 psi

Answer: (B)

A pump should deliver enough pressure to push water through the hose layout and reach the nozzle reliably, without stressing the equipment. The range from five hundred to eleven hundred psi is considered normal because it covers the pressures needed to overcome friction losses, elevation, and nozzle requirements in typical firefighting setups, while staying within what the system components and relief devices are designed to handle. Operating well below this range often means insufficient flow for the task or a problem with supply, valve positions, or pump settings. Pressures climbing above the upper limit suggest the relief valve is activating or a fault is causing excessive pressure, which isn’t normal and should be addressed.