(A) Recirculation required. All private swimming pools shall be of the recirculation type in which circulation of the water is maintained through the pool by pumps, the water drawn from the pool being clarified and disinfected before being returned to the pool.
(B) Recirculation system and appurtenances.
(1) Private residential swimming pool recirculation systems shall consist of pumping equipment, hair and lint catcher, filters, together with the necessary pipe connections to the pool inlets and outlets, facilities and pipe connections necessary for back washing filters and facilities and equipment for disinfecting the pool water.
(2) The recirculation system pump shall have sufficient capacity to discharge the volume of water required for an 18-hour turnover of the pool against the maximum head in the recirculating system.
(3) The pump used for backwashing-type filters shall have sufficient capacity to provide a filter backwash rate of at least ten gallons per minute per square foot of filter area.
(4) A hair and lint catcher or strainer shall be installed on the suction side of the circulation pump to prevent hair, lint and other extraneous matter from reaching the pump filters. Hair and lint catcher shall be so designed that they can be easily dismantled for cleaning and inspection and shall be so located as to be easily accessible for cleaning.
(5) Recirculating systems shall contain rapid pressure filters. Sufficient filter area shall be provided to filter the entire contents of the pool in 18 hours at a rate of not more than five gallons per square foot of filter area per minute. The filter backwashing facilities shall be sufficient to backwash at a rate of ten gallons per minute per square foot of filter area. All backwater and effluents shall be discharged to the sewer through an indirect connection. Pressure filters shall be equipped with readily accessible air relief valves loss of head or pressure gauges on the inlet and outlet pipes to determine the frequency of cleaning and an access head or hole large enough to permit inspection, maintenance and repair work. Sight glass that can be easily removed for cleaning shall be provided in the effluent line from the filter units. Operating instruction shall be posted on every filter system and all valves shall be properly designated with metal tags indicating purpose.
(C) Inlets and outlets.
(1) Private residential swimming pool water recirculation system inlet shall be located so as to produce, so far as possible, uniform circulation of water throughout the pool without the existence of dead spots and to carry pool bottom deposit to the outlets and shall discharge at a minimum of ten inches below the pool overflow level. A main outlet shall be placed at the deepest point in the pool and fitted with a safe grating. No direct connection shall be made to the sewer. A minimum of one recirculation system inlet shall be provided for every 615 square feet of surface area of the pool.
(2) Pools shall be equipped with suitable facilities for adding make-up water as needed. There shall be no physical connection between the water supply line and the pool system. If the make-up water is added directly to the pool, the outlet shall be at least six inches above the upper rim of the pool. The point of discharge shall be at least six inches above the rim of the tank. If a hose connection from sill cock or other plumbing fixtures is to be used for supplying make-up water, then an approved vacuum breaker shall be installed between the sill cock or control valve at the fixture and the hose connection. The vacuum breaker shall be installed at a height no less than seven feet six inches above the floor, platform or ground upon which a person would stand when operating the sill cock or control valve.
(Prior Code, § 8-6-6) Penalty, see § 153.99