PIPE: A. Copper Tube: Copper tubing shall be Type K meeting the requirements of Federal Specification WWT 7996 and conforming to ASTM B-75, B-88 and B-68 as they apply to Type K Copper Tubing. B. Ductile Iron Pipe (4-inch to 16-inch): Ductile iron pipe used for exterior piping shall be manufactured in accordance with the latest revision of AWWA/ANSI C151/A21.51. Ductile Iron pipe shall be Class 52, centrifugally cast, double cement lined in accordance with AWWA/ANSI C104/A21.4, push-on joint or mechanical joint type, unless otherwise specified on the Drawings. Ductile iron pipe shall be supplied in 18-20 foot lengths with factory applied bituminous coatings in accordance with AWWA C151. C. PVC Pipe and Fittings: Polyvinyl chloride (PVC) pipe and fittings shall be blue or white unplasticized PVC plastic pressure pipe with integral bell and spigot joints for the conveyance of water. This pipe shall meet the requirements of AWWA Standard C900, “Polyvinyl Chloride (PVC) Water Distribution Pipe” and shall be manufactured by North American Specialty Products, J-M Manufacturing Company, Harvel Plastics Inc., or equal. All pipe shall be suitable for use as pressure conduit. The bell shall consist of an integral wall section with a factory installed, solid cross-section elastomeric gasket, which meets the requirements of ASTM F477. The bell section shall be designed to be at least as hydrostatically strong as the pipe barrel and meet the requirements of AWWA C900. The joint design shall meet the requirements of ASTM D3139. Pipe shall be DR18, and pressure rating shall be a minimum of 235 pounds per square inch (PSI). All bolts, nuts, washers, and other fastening devices shall be designed for use in corrosive service environments. All fastening devices shall be Type 316 stainless steel and conform to ASTM F 593 and ASTM F 594 standards. All nuts and bolts shall be installed with an antiseize compound of molybdenum disulfite base. All PVC pipe must have 12-gauge tracer wire installed below the pipe and warning tape installed 1-foot above the pipe during installation. GATE VALVES, FITTINGS, and STOPS: A. Fittings: Pipe fittings shall be ductile iron, cement lined fittings. All fittings, except those associated with the flange pipe systems, shall have mechanical joints. The fittings shall be designed in accordance with the latest revision of AWWA/ANSI C153/A21.53 or AWWA/ANSI C110/A21.10, ductile iron and rated for 350 PSI working pressure for 3-inch through 24-inch diameter (250 PSI working pressure; 30-inch through 48-inch). All exterior fittings are to be bituminous coated, cement lined and seal-coated as previously specified for ductile iron pipe. B. Accessories: Accessories such as gaskets, glands, bolts, nuts, etc., shall be designed in accordance with AWWA/ANSI C-111/A21.11 and shall be furnished as required to make all piping systems complete. C. Gate valves: Gate valves shall be manufactured in accordance with the latest revision of ANSI/AWWA C-515. Gate valves shall be OPEN LEFT (COUNTER-CLOCKWISE), mechanical joint, resilient wedge, non-rising stem type, designed for minimum 250-PSI working pressure. Gate valves shall meet or exceed requirements AWWA C-515 of latest revision, shall be UL listed and FM approved. The valves shall be manufactured of high-strength ductile iron with a wall thickness meeting or exceeding the requirements of AWWA C-515. The wedge shall be ductile iron, gray iron, or copper alloy fully encapsulated in rubber in accordance with AWWA C-515, provided with protective wedge guide covers, symmetrical and shall seal equally well with flow in either direction. Valve stems shall be sealed by three (3) O-rings, with two (2) of the O-rings residing above the thrust collar. O-rings above the thrust collar shall be replaceable under full working pressure and with the valve in the full open position. Exterior nuts and bolts shall be type 304 stainless steel, with hexagonal heads and with dimensions conforming to ANSI B18.2.1. The operating nut shall be 2-inch square, ductile iron and constructed to ensure even valve operating input torque. Valve body gaskets shall be of the pressure energized O-ring style. The waterway shall be smooth and oversized with no depressions or cavities in the seat area that will allow foreign material to accumulate and affect closure or sealing. The valve body and bonnet shall be fusion bonded epoxy coated, inside and out per AWWA C-550. The coating shall be electro-statically applied prior to assembly and certified to ANSI/NSF 61 Standard. The valves shall be of the non-rising stem design with sealing accomplished by double "O" rings. Gate valves shall be fully assembled in the USA according to AWWA Specifications...
