7-114 SECTIO N 740 – WATE R LINES AND APPURTENANCES
740.0 1 PLASTI C PIPE, FLEXIBLE . Flexible plastic pipe shall be polyethylene plastic pipe suitable for
the transportation of potable water and shall conform to the requirements of ANSI/ AWWA C901 . The material grade selected shall be capable of withstanding a minimum sustained water pres sure of 160 psi at 73°F. The pipe shall be inside -diameter controlled. Fittings may be either nylon, copper, or bronze. Clamps shall be stainless steel.
740.0 2 PLASTI C PIPE, RIGID (PVC) . Rigid PVC plastic pipe shall be suitable for the transportation of
potable water and shall conform to the requirements of ANSI/AWWA C900 . The material grade selected shall be capable of withstanding a minimum sustained water pressure of 160 psi at 73°F. Fittings shall be PVC plastic conforming to the requirements of ANSI/ AWWA C907 .
740.0 3 COPPE R TUBE , SEAMLESS . Seamless copper water tube shall conform to the requirements of
ASTM B88, Type K.
740.0 4 STEEL PIPE, GALVANIZED . Galvanized steel pipe shall be suitable for the transportation of
potable water and shall be the standard weight class conforming to the requirements of ASTM A53 .
740.0 5 DUCTIL E IRON PIPE, CEMEN T LINED . Ductile iron pipe shall be cement lined and
centrifugally cast in metal - or sand -lined molds. The pipe shall conform to the requirements of ANSI/AWWA C151/A 21.51 and the cement mortar lining shall conform to the requirements of ANSI/ AWWA C104/A21.4 . The class of pipe shall be as specified in the Contract.
740.0 6 PIPE INSULATION . Thermal insulation for pipes shall be preformed to fit standard pipe sizes
and may be supplied as either hollow cylindrical shapes (split in half lengthwise) or as curved segments. Insulation shall include all accessories complete with proper jackets or facings as required by the conditions. Multilayer insulation is acceptable provided the inside and outside diameters of each layer will ensure proper nesting. The thermal conductivity of the insulation material shall not exceed 0.27 BTU -inch per hour per square foot per degree Fahrenheit at a mean temper ature of 75°F as determined in accordance with ASTM C177 or ASTM C518 . The thickness and jackets shall be as specified in the Contract. Pipe insulation used as bond breakers for structures shall meet the requirements of ASTM C534 . 7-115 SECTIO N 742 – DISINFECTANTS
742.0 1 CHLORIN E SOLUTION . Chlorine solution used for disinfecting springs, wells, and other water
systems shall consist of a solution of water and liquid chlorine, sodium hypochlorite, calcium hypochlorite, or chloride of lime. Liquid forms o f chlorine or sodium hypochlorite and powder forms of calcium hypochlorite or chloride of lime shall be used according to the instructions supplied by the manufacturer and as recommended by the Vermont Department of Health. If sodium hypochlorite is alread y in solution as a laundry bleach containing 5.25% sodium hypochlorite, it shall be used at the rate of one part per 12,000 parts of water to be disinfected. The dosage should be sufficient to produce a chlorine taste in the water.
742.0 2 SPAC E DEODORIZER . Space deodorizer shall consist of a commercial liquid concentrate that,
when applied at the dilution ratio recommended by the manufacturer, will suppress the obnoxious odors produced by the material to which it is applied. The deodorizer shall be non -corrosive to the material to which it is applied. The deodorizer shall be nontoxic and nonirritating. It shall be approved by the Engineer before use.
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