Pipe material changes between manholes may be permitted provided there is not a substantial difference in inside diameters, a smooth uniform flow line is maintained and a watertight rubber sleeve or mechanical coupler conforming to ASTM C-425 is used to make the transition. Metal hardware shall be stainless steel. Transition sleeves shall be Fernco Strong Back Repair Coupling, Mission Flex-Seal ARC Coupling, Indiana Seal or approved equal.
(Ord. of 11-7-16, No. 10-16)