26 September 2006
Hydrants must be located with consideration given to emergency
At least one hydrant must be located within 45 m (150 ft) of the fire
Hydrants protecting warehouses must be spaced a maximum of 91
m (300 ft) apart.
Hydrants protecting aircraft hangars must be located at 91 m (300
ft) maximum intervals, and there must be at least one hydrant at
each corner of the hangar.
Hydrants protecting POL storage and distribution facilities must be
spaced at 91 m (300 ft) maximum intervals. Provide a minimum of
two hydrants. Locate hydrants so that protected exposures can be
reached by hose lays not exceeding 91 m (300 ft) in length.
Hydrants protecting aircraft parking and servicing aprons must be
spaced at 91 m (300 ft) maximum intervals along one side.
Hydrants protecting exterior storage must be spaced at 91 m (300
ft) maximum intervals around the perimeter.
Hydrant spacing must not exceed 182 m (600 ft) for housing
developments without sprinkler protection. Hydrant spacing must
not exceed 305 m (1,000 ft) for housing developments with
Hydrants located adjacent to parking areas or other vehicle traffic areas, must be
protected by bollards. The bollards must be located so they are not directly in
front of an outlet.
Pressure-Regulating Valves (PRVs) .
PRVs are restricted in use on fire protection water systems by NFPA 24. Where
essential, PRVs must be installed on individual services rather than on the main
piping. Where PRVs are provided in distribution mains supplying systems or
portions of systems with fire hydrants, automatic sprinkler systems, or other
installed fire protection, the following features must be provided to safeguard
against failures and to facilitate maintenance:
Control valves on each side of the PRVs.
Bypasses around PRVs.