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be ladders, stairs or underwater benches/swimouts in the deep end. Where manufactured diving equipment is to be used, benches or swimouts shall be recessed or located in a comer. Exception: In private pools having more than one shallow end, only one set of steps are required. A bench, swim-out or ladder may be used at all additional shallow ends in lieu of an additional set of steps. R4101.19 Final inspection. All swimming pool installations must be completed. The pool shall be completely filled with water and in operation before final inspection. R4101.20 Filters. The entire design of matched components shall have sufficient capacity to provide a complete turnover of pool water in 12 hours or less. R4101.20.1 Sand filters. R4101.20.1.1 Approved types. Rapid sand filters (flow up to 5 gpm per square foot) shall be constructed in ac- cordance with approved standards. Where high rate sand filters (flow in excess of 5 gpm per square foot) are used, they shall be of an approved type. The circulation system and backwash piping shall be adequate for proper back- washing of said filter and shall provide backwash flow rates of at least 12 gpm per square foot or rapid sand fil- ters or 15 gpm per square foot or high rate sand filters. R4101.20.1.2 Instructions. Every filter system shall be provided with written operating instructions. R4101.20.1.3 Filter system equipment. On pressure type filters, a means shall be provided to permit the re- lease of internal pressure. A filter incorporating an auto- matic internal air release as its principal means of air release shall have lids which provide a slow and safe re- lease of pressure as part of its design. A separation tank used in conjunction with a filter tank shall have as part of its design a manual means of air release or a lid which provides a slow and safe release of pressure as it is opened. R4101.20.2 Diatomite type filters. R4101.20.2.1 Design. Diatomite-type filters shall be de- signed for operation under either pressure or vacuum. The design capacity for both pressure and vacuum filters shall not exceed 2 gpm per square foot of effective filter area, R4101.20.2.2 Filter aid. Provision shall be made to in- troduce filter aid into the filter in such a way as to evenly precoat the filter septum. R4101.21 Pool fittings. R4101.21.1 Approved type. Pool fittings shall be of an ap- proved type and design as to be appropriate for the specific application. R4101.21.2 Skimmers. Approved surface skimmers are re- quired and shall be installed in strict accordance with the manufacturer's installation instructions. Skimmers shall be installed on the basis of one per 800 square feet (74 m2) of surface area or fraction thereof, and shall be designed for a flow rate of at least 25 gallons per minute (gpm) (1.6 Us) per skimmer. FLORIDA BUILDING CODE - RESIDENTIAL SWIMMING POOLS R4101.21.3 Main outlet. An approved main outlet, when provided, shall be located on a wall or floor at or near the deepest point in the pool for emptying or circulation, or both, of the water in the pool. R4101.21.4 Hydrostatic relief device. In areas of antici- pated water table an approved hydrostatic relief device shall be installed. Exception: Plastic liner pools (where there is no struc- tural bottom to the pool). R4101.21.5 Inlet fittings. Approved manufactured inlet fit- tings for the return of recirculated pool water shall be pro- vided on the basis of at least one per 300 square feet (28 m2) of surface area. Such inlet fittings shall be designed and con- structed to insure an adequate seal to the pool structure and shall incorporate a convenient means of sealing for pressure testing of the pool circulation piping. Where more than one inlet is required, the shortest distance between any two re- quired inlets shall be at least 10 feet (3048 mm), R4101.22 Equipment foundations and enclosures. All pool motors and equipment shall be installed in compliance with the manufacturers recommendations. All heating and electrical equipment, unless approved for outdoor installation, shall be adequately protected against the weather or installed within a building, R4101.23 Accessibility and clearances. Equipment shall be so installed as to provide ready accessibility for cleaning, oper- ating, maintenance and servicing. SECTIONS E4102 through E4109 Reserved. 41.7