(a) Size. Unless otherwise approved, all material for pipes, fittings and specials shall be cast iron, either ductile or grey iron. Pipes shall be a minimum of six inches in diameter.
(b) Ductile Cast Iron Pipe. Shall be manufactured in accordance with ASA Specification A 21.50 and A 21.51 or with AWWA Standard C 151.
(1) The pipe shall have push-on rubber gasket joints or mechanical joints meeting the requirements of ASA Specification A 21.11 or AWWA Standard C 111.
(2) Pipes shall be Class III, unless otherwise approved.
(3) Ductile cast iron specials and fittings shall conform to the requirements of ASA Specification A 21.10 or AWWA Standard C 110.
A. Fittings and specials shall be Class 150.
B. Fittings shall have mechanical joints, unless otherwise approved.
C. Ductile iron retainer glands with set screws shall be used to lock joints in connections.
(4) All pipes and fittings shall be cement-lined half-thickness to meet Federal Specification WW-P-421a, Subsection 3.10.
(5) The outside of the pipes shall be coated with a uniform coating of coal tar varnish or enamel applied hot.
(Ord. 21-78. Passed 6-27-78; Ord. 2022-15. Passed 5-16-22.)