NFPA 14 requires pressure-reducing valves to limit residual and static pressure at the hose connection outlet to no more than how many psi?

NFPA 14 requires pressure-reducing valves to limit residual and static pressure at the hose connection outlet to no more than how many psi?

• A. 125 psi
• B. 175 psi
• C. 150 psi
• D. 200 psi

Answer: (B)

The key idea is that a pressure-reducing valve is used on standpipe hose connections to keep the pressure at the outlet within a safe, workable range. NFPA 14 specifies that both the static pressure (with no flow) and the residual pressure (while water is flowing) at the hose connection outlet must not exceed 175 psi. This cap protects hoses, fittings, and valves from damage due to excessively high pressure and helps ensure firefighters have predictable, usable pressure for operations. The valve adjusts to whatever the supply or elevation losses impose, so the outlet pressure stays at or below 175 psi.

The key idea is that a pressure-reducing valve is used on standpipe hose connections to keep the pressure at the outlet within a safe, workable range. NFPA 14 specifies that both the static pressure (with no flow) and the residual pressure (while water is flowing) at the hose connection outlet must not exceed 175 psi. This cap protects hoses, fittings, and valves from damage due to excessively high pressure and helps ensure firefighters have predictable, usable pressure for operations. The valve adjusts to whatever the supply or elevation losses impose, so the outlet pressure stays at or below 175 psi.