PVC water main is allowed after master meter pits in areas that
the Town of Halfmoon will not own or maintain.
All water services one-inch through two-inches in diameter shall
be made with copper service pipe. All copper service pipe shall be
softer temper Type K seamless copper tubing conforming to ASTM Specification
B88 for underground service. Copper service pipe shall have the following
dimensions and weights:
Nominal Pipe Size
(In)
|
Outside Diameter
(In)
|
Weight per feet
(Lbs)
|
---|
1
|
1.125
|
0.839
|
1 1/2
|
1.625
|
1.360
|
2
|
2.125
|
2.060
|
Branch connections shall be 'Y' Type, minimum two branch for
one-inch inlet and two inch outlet. Branch connections shall be two
branch Mueller H-15343N, three branch Mueller H-15071 110 Compression
straight couplings shall be used on the outlet end of the branch connections
to provide the required compression connection to the copper or HDPE
(CTS) service pipe.
Connections to existing systems shall be reviewed and considered
on an individual basis by the Town. In general, connections shall
be made with minimal or no disruption to the water service in the
existing system.
At times when pipe laying is not actually in progress, the open
ends of the pipes shall be closed temporarily with pipe plugs or by
other means. This shall occur at a minimum of the end of each workday.
If water is in the trench when work is resumed, the trench shall be
dewatered and the plugs shall not be removed until all danger of water
entering the pipe is past.
At the conclusions of the work, the contractor shall thoroughly
clean all new pipes by flushing with water or other means to remove
all dirt, stones, pieces of wood, etc., which may have entered during
the construction period. If, after this cleaning, any obstructions
remain, they shall be removed to the satisfaction of the Town Engineer
and the Town of Halfmoon Water Department. Pipes shall be flushed
at a rate of 2.5 feet per second for a duration suitable to the Engineer
and the Town of Halfmoon Water Department. The rates of flow required
to produce 2.5 feet per second flushing velocity in different sizes
of pipe are as shown in the following table:
Pipe Size
(inches)
|
Flow Required to Produce 2.5 fps Velocity (Gallons Per Minute)
|
---|
4
|
100
|
6
|
220
|
8
|
390
|
10
|
615
|
12
|
880
|
16
|
1575
|
Hydrostatic acceptance tests, consisting of a pressure test
and a leakage test, shall be performed on all sections of all water
systems installed after the trench has been backfilled. Hydrostatic
presumptive tests may be performed when the system is partially complete.
Unless specifically approved by the Town, no water distribution
system installation and construction shall take place when the air
temperature is below 32° F. The owner must be granted special
permission in writing when the air temperature is below 32° F.
by the Town of Halfmoon Water Department.