What hydrostatic test does NFPA 14 require for standpipe acceptance?

NFPA 14 requires new standpipe systems (including yard piping and fire department connection piping) to be hydrostatically tested at not less than 200 PSI for 2 hours — or at 50 PSI above the maximum system working pressure, whichever is greater. The test pressure is measured at the low elevation point of the individual system or zone, and the piping must show no leakage beyond the standard's allowance.

Acceptance testing for a new or modified standpipe also includes:

• Flushing the underground supply piping before connection, and the standpipe piping itself
• A flow test at the hydraulically most remote hose connection to demonstrate the system meets its design demand, recording flow and residual pressure
• Operating control and hose valves through their full range
• Flow testing any pressure-regulating or pressure-reducing valves
• Trip testing dry-pipe or deluge valves on dry and semi-automatic systems
• Installing the hydraulic placard and signage

CertBox includes a standpipe acceptance test certificate recording the flush, hydrostatic and flow tests with a professional PDF for the contractor, owner and AHJ.