MIL-HDBK-1005/7A
e)
Economic considerations.
f)
Ease of maintenance.
g)
Ease of making taps and connections.
7.1.3.2
Corrosion Protection . Refer to MIL-HDBK-1004/10,
Electrical Engineering Cathodic Protection and AWWA M27,
External Corrosion, for methods to be used in corrosion
protection.
7.1.3.3
Maintenance of Low Friction . Refer to par. 7.2 for
guidance on maintenance of low friction.
7.1.3.4
Structural Requirements. Refer to AWWA standards as
stated in par. 7.1.3. for methods of determining and specifying
pipe wall thickness for each pipe material and for other
information pertaining to strength of pipe.
7.1.4
Installation . Recommended Standards For Water Works,
Health Education Services, 1997 edition, provides information
regarding installation requirements. The requirements consider
the following factors:
a) Mains should be clear of all structures, adjacent
to and parallel to streets, and where possible out of roadways.
b) Mains should be in an allocated higher part of
street rights-of-way, to simplify separation from sewers and
c) Mains should be laid in trenches separate from
sewer lines, and above and at least 10 ft away from nearby
sewers; preferably on the opposite side of the street.
d) Where a sanitary sewer crosses over a main, it
must be in pressure pipe or encased in at least 8 in. of
concrete for 10 ft on both sides. Provide a minimum vertical
distance of 18 in. between the outside of the water main and the
outside of the sewer.
e) Avoid laying mains in water or in trenches subject
to flooding during construction.
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