MIL-HDBK-1005/7A
7.4.2.1
Installation . Follow installation requirements in MIL
HDBK-1008C and AWWA Manual M17, Installation, Field Testing, and
Maintenance of Fire Hydrants.
7.4.2.2
Valve. A shutoff valve with a valve box should be
installed on the branch between the hydrant and the main.
Wherever possible, provide a concrete collar around the branch
between the valve and the hydrant, to protect the valve in case
the hydrant receives impact damage. The branch line to the
hydrant and the valve should be 6-in. diameter.
7.4.3
Appurtenances. Criteria regarding selection of
appurtenances are given below:
7.4.3.1
Operator Shutoff Valves and Gates. Use manual,
direct, and geared type on all shutoff valves and gates for
normal operations. Use automatic type, either motorized,
hydraulic, or pneumatic, above grade or housed, in the following
applications:
a)
Where the gates or shutoff valves are too large
for manual operation.
b)
Where a specific rate is set for opening or
closing, to reduce surges in pipelines.
c)
Where frequent operation is required (medium
sized valves).
d)
Where required at large multi-pump installations.
e)
Where their installation is justified both
economically and functionally.
7.4.3.2
Valve Boxes. Use valve boxes for small and medium
sized underground shutoff valves.
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