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(A) Pools shall be of the recirculating type. Provisions shall be made for complete, constant, continuous circulation of water through all parts of the pool. The circulation system shall not be turned off except for necessary maintenance or when the pool is taken out of service for an extended period of time. A recirculation system consisting of piping, pumps, filters, water conditioning and disinfectant equipment and other accessory equipment which will clarify and disinfect the volume of water in the pool shall be provided for all swimming pools. Pools shall be provided with a rate flow meter or meters installed in accordance with manufacturers directions to measure all necessary rates of flow as indicated by this article. A lint and hair catcher shall be provided on all circulation pump suction lines. All swimming pool water shall be recirculated through rapid sand, high rate sand, cartridge-type or diatomite filters. The rate of flow through the filter shall not exceed the National Sanitation Foundation approved rate. All filters shall bear the Seal of Approval of the National Sanitation Foundation.
(B) (1) Pump and motor units for recirculation shall be selected for performance and will meet the conditions of quantity required for filtering and cleaning the filters with the total dynamic head developed by the complete system. The requirements for filtration shall be based upon the maximum head loss developed immediately prior to washing the filters. Pump performance curves for the unit to be installed shall be submitted with the construction plans for approval.
(2) The filtration system shall be designed to be operated at a rate sufficient to assure a complete recirculation of the pool water through the filter and automatic disinfection system within the following maximum time periods:
(a) For Class A and Class B pools, six hours;
(b) For Class C pools, two hours;
(c) For Class D pools, one hour
(3) Any filtration system lawfully installed prior to the effective date of this article which does not consistently meet the maximum time period may continue in use only if the filtration system complies with all standards of disinfection and water clarity established elsewhere in this article. A system which is not consistently in compliance must be upgraded to meet the recirculation requirements of this division (B) by the deadline established in writing by the Enforcement Authority.
(C) Filters shall be piped for effective backwashing, excluding disposable cartridge-type filters. If rapid sand filters are used, a minimum of three filters shall be provided. The backwash rate shall meet National Sanitation Foundation approved backwash rate. Disposable cartridge filters shall be kept clean.
(D) Provisions shall be made for disposing of backwash water and pool contents to the city sanitary sewer. A two chamber sand interceptor served by a sewer line meeting the requirements set forth in the Uniform Plumbing Code (UPC) shall be provided for all backwash systems installed on a pool after the effective date of this article.
(E) Diatomaceous earth filtered water must be discharged into a sewer in a manner which eliminates solids from the discharge. This shall be done by using a separation tank, receiving chamber, or any other permanent method approved by the Enforcement Authority.
(F) Nonpermanent media filters shall also have suitable provision for adding feed chemicals or filter media.
('74 Code, § 11-5-7A.9) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
Ventilation shall be provided to minimize condensation and odors. A minimum of four air changes per hour and a maximum of eight air changes per hour shall be maintained within the indoor pool area. The pool area shall be ventilated to the outside without returning air to the central heating system, or air shall be recirculated through a dehumidifying system. The building ventilation system shall be designed to preclude air in the bathroom from drifting into other areas.
('74 Code, § 11-5-7A.10) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
Inlets shall be located to produce complete and uniform circulation of water and to facilitate the maintenance of a uniform disinfectant residual throughout the entire pool. Inlets from the recirculation system shall be submerged at least 12 inches below water level. Inlets in the pool bottom shall pose no hazard to bathers. All inlets shall be adjustable to obtain the desired rate and direction of water flow. All pools shall have a minimum of one return inlet for each 15,000 gallons of water or fraction thereof. If the distance across any portion of the swimming pool is more than 30 feet, multiple inlets shall be provided on opposite ends.
('74 Code, § 11-5-7A.11) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
All electrical lights, fixtures, outlets, and other equipment shall be in compliance with the provisions of the National Electric Code. If underwater lighting is used and night swimming is allowed, area lighting shall be provided for the deck areas and shall be directed toward the deck areas away from the pool surface. The area lighting shall have a total capacity of not less than 15 foot candles. If underwater lighting is not employed, and night swimming is allowed, area and lighting on the pool combined shall be provided in an amount of not less than 30 foot candles. If underwater lighting is provided, such lights shall be so installed as to create no hazard to bathers.
('74 Code, § 11-5-7A.12) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
All swimming pools shall be provided with at least one main outlet at the deepest point. If the pool width is greater than 25 feet, multiple outlets shall be provided. Multiple outlets shall be spaced not more than 20 feet apart, nor more than ten feet from side walls and shall be located to provide uniform withdrawal of water from the deepest part of the pool. Drains shall be protected by anti-entrapment devices.
('74 Code, § 11-5-7A.13) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
(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)
The water supply to the swimming pool shall be protected from back flow, back-siphonage, back pressure, and cross-connection, and all plumbing fixtures shall be installed and maintained in accordance with municipal law. All plumbing, fixtures and piping shall comply with the Uniform Plumbing Code. All plastic piping shall have the approval of the National Sanitation Foundation. Water heaters and boilers shall comply with applicable ordinances. Pool piping shall be sized to allow the flows for filtering and cleaning without exceeding the maximum head of the pump, as rated by the National Sanitation Foundation or other similar authority.
('74 Code, § 11-5-7A.15) (Ord. 12-1978; Am. Ord. 59-1987; Am. Ord. 51-1989; Am. Ord. 12-1993)
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