EARTHWORK A. Comply with requirements in Section 312000 "Earth Moving" for excavating, trenching, and backfilling. 3.2 PIPING INSTALLATION A. Drawing plans, schematics, and diagrams indicate general location and arrangement of domestic water piping. Indicated locations and arrangements are used to size pipe and calculate friction loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on coordination drawings. B. Install copper tubing under building slab according to CDA's "Copper Tube Handbook." C. Install ductile-iron piping under building slab with restrained joints according to AWWA C600 and AWWA M41. D. Install underground ductile-iron pipe in PE encasement according to ASTM A 674 or AWWA C105/A21.5. E. Install shutoff valve, hose-end drain valve, strainer, pressure gage, and test tee with valve inside the building at each domestic water-service entrance. Comply with requirements for pressure gages in Section 220519 "Meters and Gages for Plumbing Piping" and with requirements for drain valves and strainers in Section 221119 "Domestic Water Piping Specialties." F. Install shutoff valve immediately upstream of each dielectric fitting. G. Install water-pressure-reducing valves downstream from shutoff valves. Comply with requirements for pressure-reducing valves in Section 221119 "Domestic Water Piping Specialties." H. Install domestic water piping level without pitch and plumb. I. Rough-in domestic water piping for water-meter installation according to utility company's requirements. J. Install piping concealed from view and protected from physical contact by building occupants unless otherwise indicated and except in equipment rooms and service areas. K. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.
