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INDIAN RIVER COUNTY JULY 25, 2014 <br />INTERGENERATIONAL RECREATION CENTER 100% CONSTRUCTION DOCUMENTS <br />3.4 TRANSITION FITTING INSTALLATION <br />A. Install transition couplings at joints of dissimilar piping. <br />B. Transition Fittings in Underground Domestic Water Piping: <br />1. Fittings for NPS 1-1/2 and Smaller: Fitting -type coupling. <br />2. Fittings for NPS 2 and Larger: Sleeve -type coupling. <br />C. Transition Fittings in Aboveground Domestic Water Piping NPS 2 and Smaller: Plastic -to -metal <br />transition fittings or unions. <br />3.5 DIELECTRIC FITTING INSTALLATION <br />A. Install dielectric fittings in piping at connections of dissimilar metal piping and tubing. <br />B. Dielectric Fittings for NPS 2 and Smaller: Use dielectric couplings or nipples. <br />C. Dielectric Fittings for NPS 2-1/2 to NPS 4: Use dielectric flanges, flange kits or nipples. <br />3.6 HANGER AND SUPPORT INSTALLATION <br />A. Comply with requirements for pipe hanger, support products, and installation in Section 220529 <br />"Hangers and Supports for Plumbing Piping and Equipment." <br />1. Vertical Piping: MSS Type 8 or 42, clamps. <br />2. Individual, Straight, Horizontal Piping Runs: <br />a. 100 Feet and Less: MSS Type 1, adjustable, steel clevis hangers. <br />b. Longer Than 100 Feet: MSS Type 43, adjustable roller hangers. <br />c. Longer Than 100 Feet if Indicated: MSS Type 49, spring cushion rolls. <br />3. Multiple, Straight, Horizontal Piping Runs 100 Feet or Longer: MSS Type 44, pipe rolls. <br />Support pipe rolls on trapeze. <br />4. Base of Vertical Piping: MSS Type 52, spring hangers. <br />B. Support vertical piping and tubing at base and at each floor. <br />C. Rod diameter may be reduced one size for double -rod hangers, to a minimum of 3/8 inch <br />D. Install hangers for copper tubing with the following maximum horizontal spacing and minimum <br />rod diameters: <br />1. NPS 3/4 and Smaller: 60 inches with 3/8 -inch rod. <br />2. NPS 1 and NPS 1-1/4: 72 inches with 3/8 -inch rod. <br />3. NPS 1-1/2 and NPS 2: 96 inches with 3/8 -inch rod. <br />4. NPS 2-1/2: 108 inches with 1/2 -inch rod. <br />5. NPS 3 to NPS 5: 10 feet with 1/2 -inch rod. <br />E. Install supports for vertical copper tubing every 10 feet <br />F. Support piping and tubing not listed in this article according to MSS SP -69 and manufacturer's <br />written instructions. <br />DOMESTIC WATER PIPING 221116 - 7 <br />