Section R. 325.2153 - Diatomaceous earth-type filtersRule 53.
(1) A swimming pool owner shall ensure that a diatomaceous earth-type filter system meets all of the following requirements, as applicable: (a) Is designed to operate at a maximum rate of 1.5 gallons per minute per square foot of filter area.(b) Is designed to operate at a maximum rate of 2 gallons per minute per square foot of filter area if body feed equipment is provided that is capable of applying 0.1 pound of diatomaceous earth per square foot of filter area per 24 hours.(c) Is designed to discharge the precoat filter effluent to waste or to an open tank for recirculation through the filter and not to the swimming pool or through a closed recirculation system.(2) A swimming pool owner shall provide a means for viewing the precoating effluent clarity.(3) A swimming pool owner shall ensure that the filter allows the effective removal of the filter-aid and the filtered-out material from the septums and the filters to waste without disassembly of the filters.(4) A swimming pool owner shall ensure that a pressure diatomaceous earth-type filter system shall have a precoat pot.Mich. Admin. Code R. 325.2153
1979 AC; 1983 AACS; 2001 AACS