(A) Overflow systems shall be provided around the entire perimeter of swimming pools. Overflow system drains shall not exceed fifteen feet on centers. The overflow gutter bottom shall be sloped one-quarter inch per foot to the drainage outlets. The outlets shall be covered with approved drain grates. The gutter shall be capable of removing continuously 50% or more of the recirculated water and returning it to the filter. Water from overflow systems shall recirculate through the filter or, in cases of pools installed prior to the effective date of this article, water may be discharged into the sewer. If a sewer is used, there shall be a minimum eight-inch air gap between the overflow system drain line and the top rim of the approved receptacle. Enclosed pipeless gutters shall be provided with clean-out covers at a maximum of 15 foot intervals and shall have a slope of not less than 1/8 inch per foot. Skimmers may be used in lieu of overflow systems provided that they shall in all respects comply with the National Sanitation Foundation Standards relating to recessed automatic surface skimmers for swimming pools. Each skimmer shall be equipped with a strainer basket and a self-adjusting weir device that shall operate freely with continuous action to variations in water level over a range of at least three inches. Skimmers shall be designed for a flow-through rate of not less than 30 gallons per minute and the total capacity of all skimmers in any pool shall be at least 80% of the required filter flow of the recirculation system. Each skimmer shall be equipped with a self-actuating equalizer line, furnished with an anti-entrapment plate or other device to prevent air lock in the suction line should the water of the pool drop below the weir level.
(B) When skimmers are used in Class A and Class B pools, a minimum of two shall be provided. Additional skimmers and skimmers used for Class C and Class D pools shall be provided for each 500 square feet of the surface area or fraction thereof. Skimmers shall be located to provide uniform withdrawal of water from the pool.
('74 Code, § 11-5-7A.14) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)