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40 <br />II <br />4. Sleeve type couplings shall be used with all buried piping. The <br />9 couplings shall be of steel and shall be Dresser Style 38, Smith <br />Blair Style413, Balser Allsteel, or equal. The coupling shall be <br />provided with hot dipped galvanized steel bolts and nuts unless <br />indicated otherwise. <br />5. All couplings shall be fiurnished with the pipe stop removed. <br />S. Couplings shall be provided with gaskets of a composition suitable <br />i for exposure to the liquid within a pipe. <br />7. if the Contractor decides to use vietaulic couplings in lieu of <br />flanked joints, he shall be responsible for supplying supports for the <br />Joints. <br />S. TAT'T'ING SLEEVES AND VALVES <br />A. Tapping sleeves shall be long body, mechanical joint type with flanged <br />outlet, ductile iron construction, split in two sections and designed for <br />assembly around the wain without halting service. The sleeve shall be <br />suitable for use with the type and D.D. of pipe 'being tapped. <br />B. Tapping valves ends shall be a standard flange (for bolting to the sleeve) <br />by mechanical joint. Valves shall have oversized seat rings to permit entry <br />l of the tapping machine cutters and, except as otherwise specified., shall ixs <br />similar in construction and operation to AWWA 0509 resilient seated ate <br />valves. apping valves and sleeves shall be cold water pressure rated at 200 <br />4 psi minimum for valve sizes up to 12 inclies or less and 1541 psi minimum <br />for valve size over incites. Tapping sleeves and valves shall be "Mueller" <br />or approved equal. <br />6 <br />a•r,2 <br />