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A.4 <br />. cePaIU <br />drain within 10 minutes after being flooded° Gutter sloped two and <br />oneehalf inches (2in) in ten feet (109. <br />50 Drainage pipes minimum to inches (2") in diameter provided with <br />corrosion-resistant grating° <br />LtH 6. Surge tank or other hydraulic arrangements provided for continuous <br />surface skimming action. SEC. 77910 <br />70 Other devices approved by the Health Department. SEC0 7791° <br />Jo SEC 0 7793-SKIMMS (in lieu of or with gutters) <br />10 Skimmers allowed on pool surface area not over 4,000 square <br />provided that there is a central recirculation filter system° <br />2. One skimmer for each 500 square feet or fractional part. Pools up <br />to 600 square feet may have only one skimmer° <br />30 Skimmers of approved designs automatically adjustable to variations <br />In water levels over range to three inches (3"), equipped with a <br />device to prevent air lock, provided with screen basket to trap <br />large solids,. <br />Skimmers have a combined rate of flow of at least 50 percent of the <br />capacity of the pool recirculation systems° <br />It 5° A maximum of four individual skim filter units allowed on public <br />pools° SEC° 78030 <br />(-) K. SEC. 7800,RECIRCUIATI0N ( inlet fittings and piping) <br />lo One inlet required for each 500 square feet of pool area. :Minimum <br />number of inlets: twoo Inlet pipe size meet pool equip ent nu- <br />facturer specifications, SECo 7789. .2 • <br />2o All valves abould be readily accessible and identified by appropriate <br />markings. Recirculation equipment shall have two feet (2 1 ) minimum <br />elearance from walls .id ceilings to permit operation and meintenanceo <br />3, Built in or portable sultion cleaner reaching all parts of the pool <br />shall be provided. Jet type units shall be provided with siphon <br />breakers. SECo 7805. <br />14 Bottom drain grate slots not over one half inch (j") wide, securely <br />fastened. SEC. 7789. <br />No r /4110° <br />5,, Approved rate of flow indicator on recirculation filter system° <br />4014Fi— 6. Pressure gusges on filter influent aid effluent lines installed at <br />same elevation (on centrally located filter systems)0 <br />`? on suction-type filter a vacuum gauge shall be provided on the suction <br />side of recirculation pump° <br />8, Hair aid lint catcher on recirculation pump except for suction-type <br />filter. <br />JO Filtration <br />SEC. 7802LRAPI SAND <br />rate not -to rxceed 3 gpmisq, ft. Backwash rate not less <br />9/61 than 12 gpm/sq,_ ft, f