UFC 3-600-01
17 April 2003
with change 16 January 2004
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
sprinkler protection.
3-7.3.3
Hydrant Protection. 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.
3-7.4
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.
3-7.5
Backflow Prevention and Cross Connection Control. The
installation of backflow prevention and cross connection control must comply with
the American Water Works Association Manual M14, Recommended Practice for
Backflow Prevention and Cross Connection Control.
3-7.5.1
Fire Suppression Systems. When backflow preventers are
provided on a fire suppression system, NFPA 13 requires backflow preventers
that are approved or listed for fire protection use by acceptable testing agencies
such as Underwriters Laboratories or Factory Mutual. Because pressure loss
through a valve can degrade the effectiveness of a fire suppression system,
design and submittal acceptance must ensure the rated working flow rate of the
valve selected or installed meets the flow requirements of the system. Perform
backflow prevention retrofit work when systems are down for major renovation
unless the threat dictates otherwise.
3-7.5.1.2
For systems connected to a potable water supply:
Where required by other criteria, install a double check valve
backflow preventer on new fire suppression system using water
only as a fire suppressant
Install a reduced pressure type backflow device where antifreeze or
other chemicals are added into the system.
3-7.5.2
Retrofit on Fire Suppression Systems. When backflow
preventers are installed in an existing sprinkler system, a thorough hydraulic
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