Town of North Greenbush, NY Distribution System

All water mains six inches in diameter and larger and all water services larger than two inches in diameter shall be ductile iron in accordance with ANSI/AWWA Specification C1151/A21.51 Class 52, double cement lined, paint seal coated and furnished in eighteen- or twenty-foot lengths. Joints shall be push-on or mechanical with rubber gasket of the type in accordance with ANSI/AWWA C-111/A21.11-90.

All pipe fittings shall be ductile iron, mechanical joint double cement lined, standard in accordance with ANSI/AWWA C110/A21-1.10-95 compact size in accordance with ANSI/AWWA C-183.

Joint resistant retainer glands shall be mechanical joint restraint with multiple wedging action, as manufactured by EBAA Iron, Inc., Megalug or equal. All clamps, tie rods or retainer glands shall be coated with a heavy coating of approved bitumastic paint after installation.

All water mains, hydrant leads and service pipes shall have a minimum of five-foot of cover.

All ductile iron pipe and appurtenances shall be encased in polyethylene. Polyethylene shall be manufactured and installed in compliance with AWWA C105/A21-.5-93.

Valve and valve boxes. All four-inch to sixteen-inch valves shall be double gate valve O-ring scaled in accordance with AWWA C-500 as manufactured by Clow F5065 or resilient seated gate valve in accordance with AWWA C509 as manufactured by Clow F6100 or equal. Valves installed underground shall be mechanical joint nonrising stem, open left. Valves installed inside structures shall be flanged, outside screw and yoke open left and shall be double gate valves as manufactured by Clow R-5702 or resilient seated gate valves as manufactured by Clow F-6136 or equal. The design working pressure (250 psi) and the test pressure (500 psi) shall be cast on the outside of the valve. All valve exterior and interior surfaces must be fusion epoxy coated conforming to AWWA C550.

Hydrants.

All hydrants shall be manufactured in conformance with AWWA C502 standards with two two-and-one-half-inch National Standard thread hose nozzles and one pumper nozzle connection with a six-inch mechanical joint inlet connection and shall open left. All hydrants shall have an approved O-ring seal around operating stem and traffic type break flange. Operating nut shall be National Standard pentagon shaped, one-and-one-half-inch point to flat face. All hydrants shall have a valved opening of not less than five inches and the barrel painted chrome yellow. The tops and nozzle caps shall be painted with reflective-type paint using the following capacity-indicating color scheme:

1500 GPM or greater: light blue.

1000-1499 GPM: green.

(c)

500-999 - GPM: orange.

(d)

Less than 500 GPM: red.

All hydrants shall be Eddy F-2640, as manufactured by the Valve Division of Clow Corporation.

All hydrant leads shall include an anchoring tee, gate valve and restraints on all joints between the tee and the hydrant. See "Typical Hydrant Installation" detail, appended hereto.[1]

[1]

Editor's Note: The "Typical Hydrant Installation detail" is located at the end of this chapter.

All hydrants shall have three sets of numbers on them: district No. / Size No. / Hydrant No.

Installation of mains.

Standards. Specifications shall incorporate the provisions of the AWWA standards and/or manufacturer's recommended installation procedures.

Bedding. A continuous and uniform bedding shall be provided in the trench for all buried pipe. Backfill material shall be tamped in layers around the pipe and to a sufficient height above the pipe to adequately support and protect the pipe. Stones found in the trench shall be removed for a depth of at least six inches below the bottom of the pipe.

Cover. All water mains shall be covered with sufficient earth or other insulation to prevent freezing.

Blocking. All tees, bends, plugs and hydrants shall be provided with reaction blocking, tic rods or joints designed to prevent movement.

Pressure and leakage testing. All types of installed pipe shall be pressure tested and leakage tested in accordance with the latest edition of AWWA Standard C600.

(6)

Disinfection. All new, cleaned or repaired water mains shall be disinfected by the continuous-feed method in accordance with AWWA Standard C651, except that the main shall have a residual of not less than 50 mg/L (50 ppm) free chlorine after 24 hours of application. The specifications shall include detailed procedures for the adequate flushing, disinfection and microbiological testing of all water mains.

Separation of water mains, sanitary sewers and storm sewers.

General. The following factors should be considered in providing adequate separation:

Materials and type of joints for water and sewer pipes.

Soil conditions.

(c)

Service and branch connections into the water main and sewer line.

(d)

Compensating variations in the horizontal and vertical separations.

(e)

Space for repair and alterations of water and sewer pipes.

(f)

Off-setting of pipes around manholes.

Parallel installation. Water mains shall be laid at least 10 feet horizontally from any existing or proposed sewer. The distance shall be measured edge to edge. In cases where it is not practical to maintain a ten-foot separation, the Water Superintendent, Town Engineer or other duly authorized officials of the Town may allow deviation on a case-by-case basis, if supported by data from the design engineer. Such deviation may allow installation of the water main closer to a sewer, provided that the water main is laid in a separate trench or on an undisturbed earth shelf located on one side of the sewer at such an elevation that the bottom of the water main is at least 18 inches above the top of the sewer.

Crossings. Water mains crossing sewers shall be laid to provide a minimum vertical distance of 18 inches between the outside of the water main and the outside of the sewer. This shall be the case where the water main is either above or below the sewer. At crossings, one full length of water pipe shall be located so both joints will be as far from the sewer as possible. Special structural support for the water and sewer pipes may be required.

Exception. The Superintendent of Water, the Town Engineer or other duly authorized officials of the Town must specifically approve any variance from the requirements of Subsections E(2) and E(3) of this section, when it is impossible to obtain the specified separation distances. Where sewers are being installed and Subsections E(2) and E(3) of this section cannot be met, the sewer materials shall be water main pipe or equivalent and shall be pressure tested to ensure water tightness.

Force mains. There shall be at least a ten-foot horizontal separation between water mains and sanitary sewer force mains. There shall be an 18-inch vertical separation at crossings as required in Subsection E(3) of this section.

(6)

Sewer manholes. No water pipe shall pass through or come in contact with any part of a sewer manhole.

(7)

Separation of water mains from other sources of contamination. Design engineers should exercise caution when locating water mains at or near certain sites such as sewage treatment plants or industrial complexes. Individual septic tanks must be located and avoided. The engineer must contact the Superintendent of Water, Town Engineer or other duly authorized officials of the Town to establish specific design requirements for locating water mains near any source of contamination.

Surface water crossings. Surface water crossings, whether over or under water, present special problems. The Superintendent of Water and/or the Town Engineer should be consulted before final plans are prepared.

Above-water crossings. The pipe shall be adequately supported and anchored, protected from damage and freezing and accessible for repair or replacement.

Underwater crossings. A minimum cover of two feet shall be provided over the pipe. When crossing watercourses which are greater than 15 feet in width, the following shall be provided:

The pipe shall be of special construction, having flexible watertight joints.

Valves shall be provided at both ends of water crossings so that the section can be isolated for testing or repair; the valves shall be easily accessible and not subject to flooding; and the valve closest to the supply source shall be in a manhole.

(c)

Permanent taps shall be made on each side of the valve within the manhole to allow insertion of a small meter to determine leakage and for sampling purposes.

Cross-connections and interconnections. There shall be no connection between the distribution system and any pipes, pumps, hydrants or tanks whereby unsafe water or other contaminating materials may be discharged or drawn into the system. Each water utility shall have a program conforming to state requirements to detect and eliminate cross connections.

§ 189-20 Water service laterals.

General. As water pipe is installed in the development of Town highways, all laterals shall be laid to the front line of each lot before roadway pavement is constructed. At locations where roadway pavement already exists, the services shall be installed without digging up the pavement. The exact method used by the contractor to accomplish this purpose shall be left to his ingenuity, but the results accomplished and the method must receive the approval of the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town. Where, in the opinion of the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town, the service cannot be installed without digging up the pavement, written permission may be given to the contractor to install the service in open cut. The property owner or contractor must obtain a highway street permit from either the North Greenbush Highway Superintendent, Rensselaer County Highway or New York State DOT.

The service from the water main to the curb box shall be a minimum size of three-fourths-inch for a one-family residence. Size of service laterals for buildings other than one-family residence shall be approved by the Superintendent of Water, Water Inspector or other duly authorized officials of the Town.

In no case shall permission be granted to supply two or more premises from a single tap, nor shall there be more than one service supply pipe to any premises without special permission in writing from the Superintendent of Water, Water Inspector or other duly authorized officials of the Town.

Installation of water service lateral and tapping of main. Where a preexisting dwelling exists or a new building is being constructed and the water main has not been tapped and brought to the property line with a curb box installed, it will be the responsibility of the property owner(s), including excavation, pipe work, backfill, replacement of pavement, etc.

Connection of water service lateral: conformity required. The connection of the water service lateral into the public water main shall conform to the requirements of this chapter and to New York State Department of Health and the American Water Works Association or federal specifications. Connections shall be made watertight and verified by proper testing. Any deviation from the prescribed procedure and materials must be approved by the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town before installation.

Applicants to notify the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town for purposes of inspections. The applicant for the water service permit shall notify the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town 24 hours in advance of when the water service lateral is ready for inspection and connection to the public water main. The connection and testing shall be made under the supervision of the Superintendent of Water, the Water Inspector or other duly authorized officials of the Town.

(6)

Direct water service connection between house service lateral and building required.

The property owner's water connection between the house water service lateral at the property line and the building shall be a direct connection. Ten feet between a water service lateral and a sanitary sewer lateral is required in accordance with the New York State Department of Health Regulations.

When connecting an existing structure served by a well to a new water service, the structure's supply plumbing shall be physically disconnected between the plumbing to be serviced by the public water system and the private well. A separate, independent supply plumbing system from the private well is allowable.

(7)

Information required to determine compliance. The Superintendent of Water, the Water Inspector or other duly authorized officials of the Town may require a user of the water service to provide information needed to determine compliance with this chapter.

Copper service pipe. Copper pipe shall be type-K "soft" copper tubing, annealed after coiling and conforming to the requirements of the latest ASTM designation B-88. All couplings required to join sections of tubing shall be compression connections similar or equal to the Mueller H-15403 coupling, copper to copper.

Corporation stops. Corporation stops shall be Standard Water Works Corporation stops similar or equal to Style H-15008 (3/4 inch and one inch) and H-15013 (1 1/2 inches and 2 inches) corporation stop with compression connection for use with copper tubing, as manufactured by the Mueller Company, or equal. Corporation stops shall have Mueller thread on the inlet.

Curb stops and boxes. Curb stops shall be Standard Water Works ground key-type, T-handle, curb stops, without drain similar or equal to the Mark III Oriseal Style H-1504-2 (3/4 inch and one inch), and Mark II Oriseal Style H-15209 (1 1/2 inch and two inches) with compression connection for copper tubing on the inlet and outlet as manufactured by the Mueller Company, or equal. Curb boxes shall be of the arch pattern extension type with a one-piece lid designed for installation on service lines having a cover of five feet to 6 1/2 feet. All boxes shall be equipped with a stationary rod with a malleable iron fork and copper pin. Curb boxes shall be similar or approved equal to Style H-10314 for three-fourths-inch to one-inch curb stops and Style H-10386 with foot piece for one-and-one-fourth-inch to two-inch curb stops, as manufactured by Mueller Company, or equal. The word "Water" shall be lettered on the box covers.

Installation.

In general, copper service pipe shall be installed at depth of five feet below finished grade. The copper tubing shall be attached to the corporation stop in a satisfactory manner and with sufficient slack being left adjacent to the corporation stop and curb stop to prevent damage to the copper tubing by movement of the earth or pipeline.

In cutting the copper tubing, a hacksaw preferably used with a miter box may be used. A cutter or tool designed for tube cutting may be used also. All cut tubing shall be reamed.

All services shall be tested for leakage. The corporation stops shall be left in the open position, and curb stops in the closed position.

Tapping the main. The main in all instances shall be tapped on the side in a horizontal position or in such position as will provide approximately five feet of cover over the connecting service line. The main shall be tapped by a skilled workman and the stop installed in accordance with most modem methods. The stops may be installed in the dry at the time the pipe is installed or may be installed at a later date at which time the main may be tapped under pressure. All defective taps shall be remedied at the contractor's expense.