What is the maximum automatic standpipe pressure limit per NFPA 14?

What is the maximum automatic standpipe pressure limit per NFPA 14?

• A. 300 psi
• B. 400 psi
• C. 350 psi
• D. 500 psi

Answer: (C)

The important idea is that NFPA 14 places an upper limit on how much pressure an automatic standpipe can deliver at its outlets. This ceiling protects hoses, fittings, valves, and other components from pressures they’re not designed to handle, while still ensuring firefighters can get the water they need. The standard sets this maximum at 350 psi, giving enough headroom for high-rise situations and typical flow demands without overstressing equipment. If a design could push outlet pressure above this limit, a pressure-regulating device or a different design is used to keep the pressure at or below 350 psi. The other options would either understate or exceed what NFPA 14 permits for automatic standpipe pressure.

The important idea is that NFPA 14 places an upper limit on how much pressure an automatic standpipe can deliver at its outlets. This ceiling protects hoses, fittings, valves, and other components from pressures they’re not designed to handle, while still ensuring firefighters can get the water they need. The standard sets this maximum at 350 psi, giving enough headroom for high-rise situations and typical flow demands without overstressing equipment. If a design could push outlet pressure above this limit, a pressure-regulating device or a different design is used to keep the pressure at or below 350 psi. The other options would either understate or exceed what NFPA 14 permits for automatic standpipe pressure.