§ 143-21. Water system.

A. 

General. All components shall be of approved, unused materials; manufacturers' recommended procedures shall be employed.

B. 

Water mains.

(1) 

The full length of each section of pipe shall rest solidly upon the pipe bed, with adequate recesses excavated for the bells and joints. The interior of all pipes shall be thoroughly cleaned of all foreign matter before being placed in the trench and shall be kept clean during the laying operations by means of plugs or other approved methods.

(2) 

The pipe shall not be laid in water or when trench conditions are unsuitable for the work, except by permission of the Engineer. Water shall be kept out of the trench until the joints have been completed. When work is not in progress, open ends of the pipes shall be securely closed so that no trench water, earth or other substances will enter the pipes or fittings.

(3) 

Any section of pipe found to be defective before or after laying shall be replaced with new pipe.

(4) 

Lines shall be installed with a minimum of five feet of cover.

(5) 

Installation standards.

(a) 

Handling. Pipe and accessories shall be handled in such a manner as to ensure delivery on the work site in sound, undamaged condition. Particular care shall be taken not to injure pipe coating. Rope or canvas slings shall be used in unloading, loading and installation of pipe which cannot be placed by hand. The use of chains or tongs shall not be permitted. All surface areas of coated pipe that are damaged shall be recoated with hot bituminous material equal to that used to factory coat the pipe.

(b) 

Cutting. Cutting of pipe shall be done in a neat and workmanlike manner without damage to the pipe or pipe lining. Unless otherwise authorized by the Town, all pipe cutting shall be done by means of an approved type of mechanical cutter. Wheel-type cutters shall be used when practicable.

(c) 

Placing and laying. Before being lowered into the trench, all sections of pipe shall be inspected for defects and tapped with a light hammer to detect cracks. Defective, damaged or unsound pipe shall be rejected.

[1] 

Deflections from a straight line or grade, as required by vertical curves, horizontal curves or offsets, shall not exceed that recommended by the appropriate specifications or, if not specified, then by the manufacturer's recommendations. If the alignment requires deflections in excess of these limitations, the owner shall provide special bends or a sufficient number of shorter lengths to provide angular deflections within the limit set forth.

[2] 

Before jointing, all lumps, blisters, excess coating material, oil and grease that will interfere with proper jointing shall be removed from the ends of all pipes.

(d) 

Mechanical joints. Mechanical joints shall be made in accordance with the manufacturer's recommendations. Rubber gaskets shall be used. Torque wrenches, calibrated in accordance with the manufacturer's instructions, shall be used on the joint assembly.

(e) 

Slip-type joints. Slip-type joints shall be made in accordance with the manufacturer's recommendations.

(f) 

Anchoring. All tee connections, bends and dead ends shall be securely anchored in place by means of tie-rods and pipe clamps or concrete thrust blocks resting against undisturbed soil.

[Amended 5-1-1995 by L.L. No. 2-1995]

(g) 

Testing. After the installation of the water distribution system or sections thereof, the waterlines shall be filled and all air blown off. The system or parts thereof shall then be subjected to hydrostatic test. All testing shall be performed in the presence of the Town and shall be under the Town's supervision. Hydrostatic testing shall conform to AWWA C600. If any section of the distribution system shows a leakage greater than specified, the leaks shall be located and repaired until the leakage is within the specified limits.

[Amended 5-1-1995 by L.L. No. 2-1995]

(h) 

Disinfection. Mains shall be disinfected in accordance with AWWA C651, after house services have been connected but prior to the issuance of a certificate of occupancy. Water containing not more than 50 parts per million of free available chlorine shall be allowed to stand in all lines and systems for at least 24 hours, after which time there shall be at least 10 parts per million residual chlorine remaining in the water. All new valves and hydrants shall be operated while the lines are filled with heavily chlorinated water. Following chlorination to the satisfaction of the Town, all disinfecting water shall be flushed from the lines until the chlorine residual does not exceed 1.0 part per million. Certificates of occupancy may not be issued until chlorination results are satisfactory.

[Amended 5-1-1995 by L.L. No. 2-1995]

C. 

Valves.

(1) 

Valves shall be set with the stems vertical. After valves have been installed and adjusted, they shall be tested for operation under maximum operating pressure, shall be watertight and shall operate easily.

(2) 

Valve boxes shall be installed so that covers are flush with the finish ground surface. Boxes shall be set vertical and centered over the valve.

(3) 

All valves shall be shown on the as-built drawings.

(4) 

A valve record card shall be completed for each valve installed. The card shall be furnished by the Town and shall be returned to the Town when completely filled out.

D. 

Hydrants.

(1) 

Each hydrant shall be set vertical and shall be anchored as indicated on the standard detail. Hydrants shall be set so that the distance between the finish grade line and the hose connections is between the limits indicated on the standard detail.

(2) 

That portion of each hydrant below finish grade shall be given a coat of hot bituminous material prior to installation. This coating shall be equal to that used for coating of cast-iron fittings and waterlines.

Editor's Note: The third unnumbered paragraph of original Section 5.3, regarding hydrant record cards, which immediately followed this subsection, was repealed 5-1-1995 by L.L. No. 2-1995.

E. 

Services.

(1) 

All service taps shall be made with a service clamp installed unless factory installed. The corporation stop shall be inserted as recommended by the manufacturer for the type pipe installed.

(2) 

The service shall be installed in accordance with backfilling requirements of these standards and in accordance with standard details.