UFC 3-600-01
17 April 2003
with change 16 January 2004
3-6.6
Meters. Where meters are installed on fire sprinkler and hose
stream water distribution systems, they must be listed by an NRTL as fire flow
meters.
3-7
WATER DISTRIBUTION SYSTEMS.
3-7.1
Distribution Mains. The distribution system must be sized to
accommodate fire flows plus domestic and industrial or flushing demands that
cannot be restricted during fires. Distribution must be looped to provide at least
50 percent of the required fire flow in case of a single break. Dead-end mains
must be avoided. Distribution systems must be designed in accordance with
American Water Works Association Manual M31 Distribution System
Requirements for Fire Protection and NFPA 24, Installation of Private Fire
Service Mains and Their Appurtenances. For Army projects, also refer to TM 5-
813-5, Water Supply, Water Distribution, Volume 5. For Navy and Air Force
projects, also refer to MIL-HDBK-1005/7, Water Supply Systems.
3-7.2
Valves. Control valves must be provided in each source of water
supply, such as tanks and pumps. Control valves must be either post-indicating
or outside-stem-and-yoke types. A sufficient number of sectional valves must be
provided so that not more than a combined total of five hydrants and sprinkler
systems, or not more than three sprinkler systems must be out of service due to
a single break. Sectional valves may be key-operated type. New valves must be
right-hand valves.
3-7.2.1
Drawings. Drawings must be provided showing control and
sectional valve locations and valve sizes. Existing left-hand valves must be
clearly indicated on drawings.
3-7.3
Hydrants. Fire hydrants must be UL listed, FM approved, or listed
or classified by an NRTL and must have two 65 mm (2-1/2-inch) hose outlets and
one 115m (4-1/2-inch) suction connection with national standard fire hose
threads in accordance with NFPA 24 and NFPA 1963, Fire Hose Connections.
Wet-barrel or California-type hydrants are preferable in areas where there is no
danger of freezing. Dry barrel or traffic-type hydrants must be used in areas
where there is a danger of freezing. Hydrants must be aboveground type. If
local municipal departments use nonstandard connections, adapters must be
made and supplied to engine companies that respond to DOD installation fires.
In DOD installations serviced by only local fire departments, hydrant hose
threads must meet local requirements.
Note 1: Overseas bases with current below grade hydrants in
accordance with local national policy are acceptable.
Note 2: For Navy projects, a 100 mm (4-inch) suction connection
must be provided for facilities that have existing fire hydrants with 100 mm (4-
inch) suction connection.
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