Section R. 325.2142 - Main and other outletsRule 42.
(1) A swimming pool owner shall ensure that a swimming pool has 2 or more main outlets for the recirculation system pump for continuous removal of water for treatment and for emptying the pool.(2) A swimming pool owner shall ensure that the main outlets for the recirculation system pump meet all of the following requirements: (a) Are designed and located to ensure the complete draining of the pool.(b) Are designed and located to prevent entrapment and to prevent the restriction of flow by the simultaneous covering of all outlets on the system by 1 person.(c) Do not extend from the swimming pool floor or wall so as to create a hazard.(d) Are covered with a grate which is not hazardous to bathers, which is secured in place, and which is removable only with tools.(e) Have an open area for each grate large enough to assure water entrance velocities of not more than 2 feet per second, with as close as practical to equal flow through each outlet grate.(f) Have the total open area for all main outlet grates large enough to assure water entrance velocities of not more than 1 foot per second.(g) Are interconnected with unrestricted piping that does not contain valves.(3) If another pump or pumps are provided, then a swimming pool owner shall ensure that the same outlet system supplying water to the pumps complies with the requirements of subrules (2)(b), (c), (d), (e), (f), and (g) of this rule.(4) A swimming pool owner shall ensure that all outlet openings meet both of the following requirements: (a) Are not less than 3 feet nor more than 20 feet from another outlet as measured center to center.(b) Are provided not more than 15 feet from a sidewall for a main outlet.(5) A swimming pool owner shall ensure that all outlet discharge piping is valved in the equipment room as close as practical to the pump suction.Mich. Admin. Code R. 325.2142
1979 AC; 1983 AACS; 2001 AACS