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PLUMBING PIPING SYSTEMS Section 15400 15-1207 B. Water lines shall not be installed in the same trench with non- metallic sewer lines unless the bottom of the water pipe at all points is at least 12 inches above the top of the sewer line and the water line is placed on a solid shelf excavated at one side of the common trench. C. Where water and waste piping cross, the pipes shall have no fittings within 10 feet of the crossing, and the water line shall be run above the waste line. Comply with any local codes or requirements. D. Close open ends of water piping each day to prevent contamination or foreign matter entering pipe during construction. Thoroughly flush out piping to remove any dirt or foreign matter. Remove and clean all aerators at end of project and prior to sterilization. 3.03 INSTALLATION OF SANITARY DRAINAGE (SEWER AND STORM DRAIN) SYSTEMS: A. Make joints between PVC pipe and cast iron pipe or fittings using cast iron adapter fittings, installed as recommended by the manufacturer. B. Sewer Piping: Run all horizontal sanitary drain piping inside of building on a uniform grade of not less than 1/4 -inch per foot, unless otherwise noted on the plans. Piping shall have invert elevations as shown and slope uniformly between given elevations. C. Storm Drain Piping: Run all horizontal storm drain piping inside of building on a uniform grade of not less than 1/4 -inch per foot, unless otherwise noted on the plans. Piping hall have invert elevations as shown and slope uniformly between given elevations. D. Run all drainage piping as straight as possible and provide easy bends with long turns; make all offsets at an angle of 45 degrees or less. E. Grade all vent piping so as to free itself quickly of any water condensation. F. Install drip pan under storm drain piping, sanitary drain piping, and vent piping that must be run over kitchen areas. G. Hubless Cast -Iron Joints: Comply with coupling manufacturer's installation instructions and in accordance with CISPI Pamphlet No. 310, latest edition. H. Cleanouts: Install in piping as indicated, as required by California Plumbing Code, at each change in direction of piping greater than 45 degrees, at minimum intervals of 50 feet for piping 4 inches and smaller and 100 feet for larger piping, and at base of each conductor. Flashing Flanges: Install flashing flange and clamping device with each cleanout passing through waterproof membrane. Install drains in accordance with manufacturer's written instructions and in locations indicated. Unless detailed otherwise, install floor drains and floor sinks with lip of drain slightly below finished floor to ensure drainage. Coordinate with other Contractors to ensure that floor slopes to drain. ES'