A. 
Pipe.
(1) 
Water main pipe size shall be determined by the expected domestic and fire flow needs in the area. All water mains shall be ductile iron and have a minimum size of eight inches in diameter.
(2) 
Water main pipe thickness class shall be determined by the expected working pressure in the area. All water mains shall be designed with a minimum of 150 pounds per square inch and in accordance with American waterworks Association (AWWA) Standard C150.
(3) 
Water main pipe size and pipe thickness class shall be approved by the Town Board before the start of construction.
(4) 
All water main pipe shall conform to AWWA Standard C151.
(5) 
All water main pipe shall be cement-lined conforming to AWWA Standard C104.
(6) 
All water main pipe shall be tar-coated conforming to AWWA Standard C151.
(7) 
In lieu of the use of ductile-iron pipe for water mains, PVC SDR 18 meeting AWWA C900 or HDPE may be used when approved by the Town Board. The PVC pipe shall be joined by preformed confined rubber gasket joints designed for the pressure expected to be experienced in the installation. A request for use of the PVC pipe alternate shall include details assuring compatibility with existing water facilities, especially connections, fillings and service connections. When installed, the pipe shall be buried with metal-faced plastic tape and other device to permit pipe location with magnetic-type metal detectors. Use of PVC pipe where approved shall comply in all aspects of installation with the requirements contained herein.
B. 
Joints. All pipe joints for ductile-iron pipe shall be made with a preformed rubber gasket conforming to AWWA Standard C111.
C. 
Fittings. Fittings shall be ductile iron and meet AWWA Specifications C110 for short-body cast-iron fittings. All fittings shall be of North American manufacture.
D. 
Valves. All water main valves shall be gate valves and shall conform to AWWA Specification C500. Valves shall have a ductile iron body, fully bronze-mounted, resilient seat with O-ring packing. Valves shall be nonrising stem with two-inch operating nuts and shall open to the right (clockwise). Gate valves shall be designed for 175 pounds per square inch working pressure and tested for 300 pounds per square inch.
E. 
Valve boxes. All gate valves shall be equipped with cast-iron, Buffalo-type, two-piece, screwed valve boxes, with a shaft of 5 1/4 inches (Mueller style H-10360 or equal). The valve box cover shall be marked "Water."
A. 
All water mains shall be installed in accordance with AWWA Specification C600 on a uniform grade and at an elevation to conform to the connecting mains.
B. 
All PVC water mains shall be bedded in No. 1 stone or sand.
C. 
Mains shall be interconnected where possible, and dead ends, where avoidable, shall not exceed 600 feet in length and shall be provided with a hydrant at the end for flushing. A main-line-size valve will be installed immediately after the hydrant tee.
D. 
Mains shall be installed on a bed of selected earth free of stones, or in a bed of fine crushed stone, to provide uniform support the full length of the pipe. In no case shall pipe be laid on blocks for support.
E. 
In the event the natural soil in the bottom of the trench is soft and will not adequately support the pipe in the opinion of the Clerk or Superintendent, the unstable soil shall be excavated from the trench and suitable, select granular material will be thoroughly compacted in its place.
F. 
Trenches shall be kept pumped out in such a manner that the pipe can be assembled under dry conditions.
G. 
All backfill around the pipe and for a height 12 inches above the pipe shall be carefully placed and compacted in six-inch layers. This backfill shall be No. 1 stone or sand and free of large stones, vegetable matter, ashes, cinders or other material that may be harmful to the pipe. The balance of the trench backfilled shall be thoroughly compacted.
H. 
Valves and fittings shall be adequately supported, on concrete pads if necessary, to assure that they will not have a differential settlement from the adjacent water main.
I. 
"Dead-end" mains shall end with fire hydrant assembly as per Article III, § 285-30.
Concrete thrust blocks and approved mechanical restraints shall be provided at all tees, bends, plugs, pipe ends and hydrants to firmly support the pipe and to prevent the pipe from shifting out of alignment. The thrust block shall bear on undisturbed ground at the side of the trench. The size of thrust blocks shall be calculated by standard engineering design methods and approved by the Town Board.
Line valves shall be located at each street intersection in such a manner that each block of each street can be isolated from the system by closing no more than two valves. Valves shall be placed so that the distance between valves will not exceed 1,000 feet.
All new mains, before they are put in service, shall be flushed with enough velocity to assure that all dirt, sand, gravel, etc., is thoroughly washed out of the section of main.
A. 
After the section of main is flushed, the line shall be filled with water, making sure that all air is expelled from the main by bleeding off the air at all high points on the line for this purpose. In any case, the line shall be filled from the lowest point possible and a tap or blow off shall be available at the highest point.
B. 
After the line is filled, the pressure in the line shall be pumped up to a minimum of 150 pounds per square inch at the lowest point on the line. At this test pressure, the maximum allowable leakage shall not exceed the requirements of AWWA Specification C600.
After testing as outlined above, all sections of water main, including hydrants and hydrant branch lines, shall be sterilized using the following procedure:
A. 
The section to be sterilized shall be completely isolated from the rest of the water system by closed valves.
B. 
A tap shall be made in the main adjacent to the valve through which the flow of water is to be admitted to the section of main to be sterilized for the purpose of injecting chlorine or hypochlorite solution. If a hydrant is not available at the far end of the section to be sterilized, a second tap shall be made at the end of the line to discharge water during the sterilizing procedure.
C. 
The valve controlling the water from the water system shall be opened and the hydrant or tap at the end of the line shall be opened. Either liquid chlorine or hypochlorite solution shall be injected into this flow of water in such a concentration as to give a minimum chlorine residual in the new main of 50 parts per million and a maximum chlorine residual of 100 parts per million. The new main shall be completely filled with this chlorinated water for 24 hours. At the end of 24 hours, the chlorine residual must be at least 25 parts per million or the sterilization procedure must be repeated.
D. 
At the end of 24 hours, the chlorinated water shall be flushed from the mains. Care should be taken in this flushing so that the highly chlorinated water will not cause damage to adjacent property or cause fish kill in adjacent streams.
E. 
After final flushing and before the water main is replaced in service, a sample or samples shall be collected from the end of the line, shall be tested for bacteriological quality in accordance with Standard Methods, and shall show the absence of coliform organisms. At least one sample shall be collected from the new main and one from each branch. If the initial disinfection fails to produce satisfactory bacteriological samples, the main may be reflushed and shall be resampled. If check samples show the presence of coliform organisms, then the main shall be rechlorinated until satisfactory results are obtained.
F. 
Depositing hypochlorite powder or tablets in the main as it is being laid will not be an acceptable substitute for the above-mentioned sterilization procedure.