UFC 3-600-01
17 April 2003
with change 16 January 2004
3-6.1.2
A secondary fire pump must be provided when the water supply
cannot support 25% of the sprinklers in the hydraulically most remote design
area with the primary fire pump out-of-service.
Note: For DLA, a secondary fire pump must be provided whenever
a fire pump is required.
Exception: For Army, Navy, and Marine Corps, this only applies to
critical facilities.
3-6.2
Pump Type. A fire pump may be either a horizontal or vertical
shaft centrifugal pump or a vertical shaft turbine pump; whichever is most
economical and appropriate for the intended use. A centrifugal pump in either
the horizontal or vertical position must not be used where suction lift is required.
A vertical shaft turbine pump must be used for suction lift.
3-6.3
Pump Starting Arrangement. Fire pumps must be arranged to
start automatically. Fire pumps may be arranged for manual starting when other
available water supply sources are capable of providing demands for automatic
sprinkler systems simultaneously with domestic and industrial demands.
3-6.3.1
Pump Shut Down. Once started, fire pumps must be arranged to
run until shut down manually.
Exception 1: Operation by automatic periodic exercise timers used
for the required preventive maintenance run times.
Exception 2: Automatic shut down upon total exhaustion of suction
reservoir water may be permitted.
3-6.4
Pump Drive. When electric power is economically available, from
a reliable single power source or from two independent sources in accordance
with NFPA 20, pumps must be electric driven only. A reliable single power
source is defined as a power source having an average forced down time,
excluding scheduled repairs, which does not exceed 8 consecutive hours for any
one incident nor more than 24 hours cumulatively over the last 3 years. When
such electrical power supplies are not available, fire pumps must be diesel
driven. Spark ignited internal combustion engines must not be used to drive fire
pumps.
Exception: A diesel driven fire pump does not have to be provided
when the fire pump is equipped with an automatic transfer switch and connected
to an emergency generator.
3-6.5
Water Level Controls. Manual controls, double-acting altitude
valves, or other automatic devices must be used to maintain the water level in
elevated storage tanks. Altitude valves must be arranged with bypasses.
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