MIL-HDBK-1005/7A
5.2.3
Installation Requirements . Use applicable sections in
the Hydraulic Institute Standards. Some typical pump stations
are shown in American Civil Engineering Practice, Volume 2.
5.2.3.1
Pump Location. Except for submersible sump pumps,
pump drives should not be placed in a pit or other location
subject to flooding. Wherever possible, locate pumps so there
is a positive suction head.
5.2.3.2
Piping Arrangement. Wherever possible provide loop
headers or otherwise arrange piping for minimum interruption of
service due to any one piping break. Where fire demand water is
furnished, arrange to supply at least 50 percent of the system
demand despite a possible break in any piping.
5.2.3.3
Suction Piping . Static lift should not exceed 15 ft,
including all losses through suction piping due to the pump
location. In all conditions of suction lift, a positive priming
facility should be provided.
5.2.3.4
Valves. Valves at pumps should be arranged to provide
for removing any pump unit from service without interruption to
others.
5.2.3.5
Pressure Relief Valves . Provide a pressure relief
valve or a small bleeder line on pump discharge, if the
characteristics of the pump permit development of excessive
pressure, or if damage to the pump could result from overheating
because of operation with zero flow. This must be done when the
pump discharges into a distribution system which does not
include an elevated storage tank, or if the system includes an
elevated tank that is protected against overflow. Review
manufacturer's data for selection criteria required
to prevent cavitation damage.
a) Recirculation Line. Where potable water is pumped
from an underground reservoir, a recirculation line should be
provided, discharging from the pressure relief valve into a
properly checked reservoir fill line.
b) Fire Pumps. Pressure relief valves should be
provided on fire pumps in accordance with National Fire
Protection Association (NFPA) Standard No. 20, Installation of
Centrifugal Fire Pumps .
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