(A) PVC pipe.
(1) Polyvinyl chloride (PVC) plastic pipe shall conform to either AWWA C900, DR 14 (Class 200) or ASTM Specification D 2241, SDR 21 (200 psi). The material used shall conform to ASTM Specification D 1784, Standard Specification for Rigid Polyvinyl Chloride and Chlorinated Polyvinyl Chloride compounds, Class 12454-B (PVC 1120) Pipe O.D. shall conform with that of steel pipe (IPS).
(2) Pipe joints.
(a) Joints for PVC and fittings shall be bell end push-on type meeting the requirements of ASTM D3139 “Joint for Plastic Pressure Pipe Using Flexible Elastomeric Seals”. The joint shall be designed so as to provide for the thermal expansion and contraction experienced with a total temperature change of 75°F in each joint of pipe. Details of the joint design and assembly shall be in accordance with joint manufacturers standard practice.
(b) Gaskets shall meet all applicable requirements of ASA Standard A21.11. Gasket dimensions shall be in accordance with the manufacturer’s standard design dimensions and tolerances. The gasket shall be made of such size and shape as to provide an adequate compressive force against the spigot and socket after assembly to effect a positive seal under all combinations of joint and gasket tolerances.
(c) Gaskets shall be vulcanized natural or vulcanized synthetic rubber. They shall be free of porous areas, foreign material and visible defects.
(3) Pipe fittings. Fittings for PVC pipe may be of the same material and class as the pipe, with joints and gaskets to properly fit the PVC pipe. All fittings of 22-1/2 degree bends and greater including tees shall be properly anchored by concrete thrust blocks of sufficient size not to exceed a soil pressure of two tons per square foot. This blocking shall be installed prior to backfilling and testing.
(B) Ductile iron pipe.
(1) Pipe. All ductile iron pipe shall be manufactured in accordance with ANSI/AWWA C150/A21.50 and ANSI/AWWA C151/A21.51. Pipe shall be Pressure Class 350 for pipes 12 inches and smaller and Pressure Class 250 for pipes 14 inches and larger. All ductile iron pipe and fittings shall be cement mortar lined and seal coated in accordance with ANSI/AWWA C104/A21.4.
(2) Fittings. All ductile iron pipe fittings shall be manufactured in accordance with ANSI/AWWA C110/A21.10 having a minimum pressure rating of 250 psi.
(3) Pipe joints. Pipe joints shall be either push-on or mechanical joint as shown on the drawings, manufactured in accordance with the following standards:
(a) Push-on joints: ANSI/AWWA C110/A21.10 and ANSI/AWWA C111/A21.11;
(b) Mechanical joints: ANSI/AWWA C110/A21.10 and ANSI/AWWA C111/A21.11;
(c) Bolts and nuts, tee-head bolts and hexagonal nuts: ANSI/AWWA C111/A21.11; and
(d) Gaskets: ANSI/AWWA C111/A21.11
(2004 Code, Art. II, § B, part 2)