(a) Force main size.
(1) Pipe to be sized for a velocity between three and ten feet per second, at design pumping rate.
(2) The minimum pipe size for use with non-clog pumps is four inches in diameter. Smaller diameters must only be used with grinder pumps.
(b) Pipe Materials.
(1) Pipe and fittings four inches in diameter and larger shall be Ductile Iron Pipe (DIP) AWWA C-151. The minimum pipe barrel thickness shall be ANSI A21.50 (AWWA C-150) Class 53.
A. Outside of pipe to be coated with either coal tar or asphalt base bituminous material.
B. The interior of the pipe shall be cement mortar and seal coated per ANSI A21.4 (AWWA C-104).
C. Pipe joints shall have watertight gaskets per ANSI A21.11 (AWWAC-111.).
(2) Pipe and fittings under four inches in diameter shall be PVC pip (ASTM D-2241, SDR 26), with watertight gasket joints per ASTM F 477 and ASTM D-3139.
(3) The force main pipe, joints, fittings and thrust restraint system shall be designed to withstand water hammer pressures associated with cyclic reversal stresses that are expected with the pump cycling.
(c) All fittings and appropriate joints shall be restrained by an approve retainer gland device or by concrete thrust blocking (See Village of Mount Gilead, Ohio Standard Details). Calculations for thrust restraint shall provided by the Developer.
(Ord. 1914. Passed 4-3-23.)