Section R. 325.2137 - Swimming pool water pipingRule 37.
(1) A swimming pool owner shall ensure that swimming pool water piping is all of the following:(b) A potable water grade.(d) Resistant to corrosion.(e) Rated to withstand operating pressures of not less than 160 pounds per square inch.(2) A swimming pool owner shall ensure that plastic pipe is equivalent to either of the following types of piping, as determined by the department:(a) Piping certified for potable water by NSF International or other nationally recognized certifying agency.(b) Schedule 40 polyvinyl chloride or heavier piping.(3) A swimming pool owner shall ensure that plastic piping is not used for the piping from 5 feet upstream to 5 feet downstream from a water heater, unless the heater manufacturer's written recommendations approve the use of shorter piping or a specific pipe product.(4) A swimming pool owner shall ensure that the piping is designed to carry the required quantities of water at velocities of not more than 5 feet per second in suction piping and 10 feet per second in pressure piping, unless greater velocities are warranted.(5) A swimming pool owner shall ensure that the piping meets all of the following requirements: (a) Is protected against erosion, corrosion, mechanical damage, and other deterioration.(b) Is provided with fittings necessary for disassembly of any part.(c) Is arranged to allow ready, safe, and proper operation and maintenance of the swimming pool facilities.(6) A swimming pool owner shall mark exposed pool piping with labels and arrows showing the normal direction of water flow.Mich. Admin. Code R. 325.2137
1979 AC; 1983 AACS; 2001 AACS