Resolutions-1997-021

4. P.V.C. pipe material shall not be used in any area where there is likelihood the pipe will be exposed to significant concentrations of pollutants comprised of low-molecular-weight petroleum products or organic solvents or their vapors. 5. P.V.C. pipe materials shall not be used around cul-de-sacs or other small radius curves. 6. P.V.C. water main shall be marked with an insulated wire for the entire length to make electronic location possible. a. The insulation shall be protected to prevent accidental grounding. Make few splices, and where necessary, wrap the bare wire with electrical tape. b. The wire shall be installed continuously as the pipe is backfilled. The wire shall be fixed to the side of the pipe at a position of 2 o'clock or 10 o'clock and attached with duct tape every 5 feet. c. Bring the wire to the ground surface at each fire hydrant. Leave 18 inches of wire exposed. If there is no fire hydrant within 500 feet, bring the wire to the surface in a valve box and mark the drawings appropriately. 7. Where there is evidence there will be considerable underground construction or several large diameter service taps or connections, ductile iron pipe materials will be used. 8. Where there is considerable deflection of the water main materials required for either horizontal or vertical changes in alignment, ductile iron materials shall be used. P.V.C. water main materials may not be deflected. P.V.C. water main joint deflections shall be limited to manufacturer's recommendations. C. Fittings 1. All fittings shall conform to ANSI/AWWA C110/A21.10, with pressure rating of Class 350. 2. Mechanical-joint fittings shall be ductile iron compact C153/A21.53 or ductile standard C110/A21.10. Large fittings, 12 inch through 20 inch shall be ductile iron standard C110.A21. Swivel tees shall be ductile iron standard C110.A21.10. Where ductile iron is not available (i.e., offsets), cast iron standard C110.A2 shall be provided. 3. All ductile iron fittings shall be Class 350, shall be bituminous coating inside and outside, shall be furnished complete with necessary accessories including plain rubber gaskets, ductile iron glands, bolts and nuts as per C111/A21.11. Verify the gasket seats are not made irregular by improper application of the lining materials.