(1) Recirculation and treatment equipment such as filters, recessed automatic surface skimmers, ionizers, ozone generators, disinfection feeders and chlorine generators must be tested and approved using the NSF/ANSI Standard 50-2007, Circulation System Components and Related Materials for Swimming Pool, Spas/Hot Tubs, dated April 2007, which is incorporated by reference in these rules. The standard and a list of approved devices is available from www.NSF.org. If standards do not exist for a specific product, the manufacturer must work with NSF or other American National Standards Institute (ANSI) approved agency to develop such standards.
(2) The recirculation system shall be designed to provide a minimum of four turnovers of the pool volume per day. Pools that are less than 1000 square feet at health clubs shall be required to provide eight turnovers per day.
(3) The design pattern of recirculation flow shall be 100 percent through the main drain piping and 100 percent through the perimeter overflow system or 60 percent through the skimmer system.
(a) Perimeter overflow gutters – The lip of the gutter shall be uniformly level with a maximum tolerance of one-fourth inch between the high and low areas. The bottom of the gutter shall be level or slope to the drains. The spacing between drains shall not exceed 10 feet for two inch drains or 15 feet for two and one-half inch drains, unless hydraulically justified by the design engineer. Gutters may be eliminated along pool edges for no more than fifteen feet and this shall not exceed 10% of the perimeter (at least 90% of the perimeter shall be guttered). In areas where gutters are eliminated, handholds shall be provided within nine inches of the water surface. Handhold design shall be approved by the department prior to construction. The gutter lip shall be tiled with a minimum of 2 inch tile on the pool wall, each a minimum size of one inch on all sides, except that stainless steel gutters are exempt from this requirement.
1. Either recessed type or open type gutters shall be used. Special designs can be approved provided they are within limits of sound engineering practice. Recessed type gutters shall be at least four inches deep and four inches wide, and no part of the recessed gutter shall be visible from a position directly above the gutter sighting vertically down the edge of the deck or curb. Open type gutters shall be at least six inches deep and 12 inches wide. The back vertical wall of the gutter shall be tiled with glazed tile, each a minimum size of one inch on all sides. This tile shall be smooth and easily cleanable. The gutter shall slope downward 2 inches, plus or minus 1/4 inch, from the lip to the drains. When open type gutters are located at pool steps and the gutter is used as a step tread, the gutter slope may be reduced to 1 inch in the area of the steps, and this tread shall be tiled with slip resistant tile. The back of the gutter drains shall be located within 3/4 inch of the back vertical wall of the gutter, where the gutter is deepest and shall be flush with the surrounding area or be recessed no more than 3/8 inch.
2. All gutter systems shall discharge into a collector tank.
3. The department shall waive the requirements of tile on stainless steel gutter systems when it can be shown that the surfaces at the waterline and back of the gutter are smooth and easily cleanable.
(b) Recessed Automatic Surface Skimmers – Recessed automatic surface skimmers may be utilized when the pool water surface area is 1,000 square feet or less excluding offset stairs and swimouts and the width of the pool is not over 20 feet.
1. The recessed automatic surface skimmer piping system shall be designed to carry 60 percent of the pool total design flow rate with each skimmer carrying a minimum 30 gallons per minute. One skimmer for every 400 square feet or fraction thereof of pool water surface area shall be provided.
2. Prevailing wind direction and the pool outline shall be considered by the designer in the selection of skimmer locations and the location of skimmers shall be such that the interference of adjacent inlets and skimmers is minimized. Recessed automatic surface skimmers shall be installed so that there is no protrusion into the pool water area. The deck or curb shall provide for a handhold around the entire pool perimeter and shall not be located more than nine inches above the mid point of the opening of the skimmer.
3. Recessed automatic surface skimmers may be installed with an equalizer valve and an equalizer line when the skimmer piping system is connected directly to pump suction. If installed, the equalizer valve shall be a spring loaded vertical check valve which will not allow direct suction on the equalizer line. Float valves are prohibited. The equalizer line inlet shall be installed at least one foot below the normal pool water level and the equalizer line inlet shall be protected by an ASME/ANSI A112.19.8-2007 compliant cover/grate. The equalizer line shall be sized to handle the expected flow with a two inch minimum line size. For existing pools, within 180 days of effective date of this rule, skimmer equalizer lines shall be permanently plugged or ASME/ANSI A112.19.8-2007 compliant covers/grates shall be installed at the inlet.
4. A wall inlet fitting shall be provided directly across from each skimmer.
5. A minimum 6-inch water line tile shall be provided on all pools with automatic skimmer systems, each a minimum size of one inch on all sides. Glazed tile that is smooth and easily cleanable shall be utilized.
(4) Pumps – If the pump or suction piping is located above the water level of the pool, the pump shall be self-priming. Pumps that take suction prior to filtration shall be equipped with a hair and lint strainer. The recirculation pump shall be selected to provide the required recirculation flow against a minimum total dynamic head of 60 feet unless hydraulically justified by the design engineer. Vacuum filter systems pumps shall provide at least 50 feet of total dynamic head. Should the total dynamic head required not be appropriate for a given project, the design engineer shall provide an alternative.
(5) Filters – Filters sized to handle the required recirculation flow shall be provided.
(a) Filter capacities – The maximum filtration rate in gallons per minute per square foot of filter area shall be: fifteen (twenty if so approved utilizing the procedure stated in subsection 64E-9.007(1), F.A.C.) for high rate sand filters, three for rapid sand filters, three-hundred-seventy-five thousandths for pleated cartridge filters and two for Diatomaceous Earth (D.E.) type filters.
(b) Filter Appurtenances.
1. Pressure filter systems shall be equipped with an air relief valve, influent and effluent pressure gauges with minimum face size of two inches reading 0-60 pounds per square inch (psi), and a sight glass when a backwash line is required.
2. Vacuum filter systems shall be equipped with a vacuum gauge which has a two inch face and reads from 0-30 inches of mercury.
3. Precoat – A precoat pot or collector tank shall be provided for D.E. type systems.
(c) Filter tanks and elements – The filter area shall be determined on the basis of effective filtering surfaces with no allowance given for areas of impaired filtration, such as broad supports, folds, or portions which may bridge. D.E. filter elements shall have a minimum one inch clear spacing between elements up to a four square foot effective area. The spacing between filter elements shall increase one-eighth inch for each additional square foot of filter area or fraction thereof above an effective filter area of four square feet. All cartridges used in public pool filters shall be permanently marked with the manufacturer’s name, pore size and area in square feet of filter material. All cartridges with end caps shall have the permanent markings on one end cap. Vacuum filter tanks shall have cover intersections between the wall and the floor and the tank floor shall slope to the filter tank drain. The D.E. filter tank and elements shall be installed such that the recirculation flow draw down does not expose the elements to the atmosphere whenever only the main drain valve is open or only the surface overflow gutter system valve is open.
(6) Piping – All plastic pipe used in the recirculation system shall be imprinted with the manufacturer’s name and the NSF-pw logo for potable water applications. Size, schedule, and type of pipe shall be included on the drawings.
(7) Valves – Return lines, main drain lines, and surface overflow system lines, shall each have proportioning valves.
(8) Flow Velocity – Pressure piping shall not exceed 10 feet per second, except that precoat lines with higher velocities may be used when necessary for agitation purposes. The flow velocity in suction piping shall not exceed six feet per second except that flow velocities up to 10 feet per second in filter assembly headers will be acceptable. Main drain systems and surface overflow systems which discharge to collector tanks shall be sized with a maximum flow velocity of three feet per second. The filter and vacuuming system shall have the necessary valves and piping to allow filtering to pool, vacuuming to waste, vacuuming to filter, complete drainage of the filter tank, backwashing for sand and pressure D.E. type filters and precoat recirculation for D.E. type filters.
(9) Inlets – All inlets shall be adjustable with wall type inlets being directionally adjustable and floor type inlets having a means of flow adjustment. Floor inlets shall be designed and installed such that they do not protrude above the pool floor and all inlets shall be designed and installed so as not to constitute sharp edges or protrusions hazardous to pool bathers. Floor inlets for vinyl liner and fiberglass pools, shall be smooth with no sharp edges, and shall not extend more than 3/8 inches above the pool floor. Wall inlets shall be installed a minimum of 12 inches below the normal operating water level unless precluded by the pool depth or intended for a specific acceptable purpose.
(a) Pools 30 feet in width or less, with wall inlets only shall have enough inlets such that the inlet spacing does not exceed 20 feet based on the pool water perimeter.
(b) Pools 30 feet in width or less with floor inlets only shall have a number of inlets provided such that the spacing between adjacent inlets does not exceed 20 feet and the spacing between inlets and adjacent walls does not exceed 10 feet.
(c) A combination of wall and floor inlets may be used in pools 30 feet in width or less only if requirements of paragraph (a) or (b) are fully met.
(d) Pools greater than 30 feet in width shall have either floor inlets only, or a combination of floor inlets and wall inlets. Pools with floor inlets only shall have a number of floor inlets provided such that the spacing between adjacent inlets does not exceed 20 feet and the spacing between inlets and an adjacent wall does not exceed 10 feet.
(e) Pools greater than 30 feet in width with a combination of wall and floor inlets shall have the number of wall inlets such that the maximum spacing between the wall inlets is 20 feet and floor inlets are provided for the pool water area beyond a 15 feet perpendicular distance from all walls. The number of floor inlets shall be such that the spacing between adjacent inlets does not exceed 20 feet and the distance from a floor inlet and an adjacent wall does not exceed 25 feet.
(f) The flow rate through each inlet shall not exceed 20 gpm.
(10) Main Drain Outlets – All pools shall be provided with an outlet at the deepest point.
(a) The depth at the outlet must not deviate more than three inches from the side wall depth marking unless designed and approved as such and dual depth markings are used.
(b) Outlets must be covered by a secured grating which requires the use of a tool to remove and whose open area is such that the maximum velocity of water passing through the openings does not exceed one and one-half feet per second at 100 percent of the design recirculation flow.
(c) Multiple outlets, equally spaced from the pool side walls and from each other, shall be installed in pools where the deep portion of the pool is greater than 30 feet in width.
(d) If the area is subject to high ground water, the pool shall be designed to withstand hydraulic uplift or shall be provided with hydrostatic relief devices.
(e) The main drain outlet shall be connected to a collector tank. The capacity of the collector tank shall be at least one minute of the recirculated flow unless justified by the design engineer. Vacuum filter tanks are considered collector tanks.
(f) All pools built without a main drain collector tank must be retrofitted with a properly sized and piped collector tank as described in the collector tank definition, the first paragraph of Rule 64E-9.005, subsections 64E-9.007(8) and 64E-9.007(10), F.A.C., on or before the following dates to eliminate direct suction through the main drain.
1. For all pools, including wading pools, except spa type pools, with a main drain grate water depth of 4 feet or less, construction shall be completed on or before one year from the effective date of this rule;
For all spa type pools built before 1977, retrofit by July 1, 2010,
For all spa type pools built between 1977 and 1986, retrofit by July 1, 2011,
For all spa type pools built between 1986 and 1995, retrofit by July 1, 2012,
And for all other pools, retrofit by July 1, 2013.
2. All existing public pools with direct suction main drains shall install as soon as possible, but in no case later than 180 days after the effective date of this rule, a main drain cover/grate that meets both the ASME/ANSI A112.19.8-2007 standard for drain covers/grates and the main drain cover/grate 1.5 feet per second water velocity requirement of this rule.
3. A modification permit shall be obtained prior to installation of the collector tank.
4. Pools that cannot be retrofitted by these dates shall be closed on or before these dates.
(g) Main drain covers/grates installed after the effective date of this rule shall comply with the requirements of ASME/ANSI A112.19.8-2007 and the water velocity requirement of this rule.
(11) An automatic and manual water makeup control must be provided to maintain the water level at the lip of the overflow gutter or at the mouth of the recessed automatic surface skimmers and must discharge through an air gap into a fill pipe or collector tank. Over the rim fill spouts are prohibited.
(12) Cleaning system – A portable or plumbed in vacuum cleaning system shall be provided. All vacuum pumps shall be equipped with hair and lint strainers. Recirculation or separate vacuum pumps shall not be used for vacuuming purposes when in excess of 3 horsepower. When the system is plumbed in, the vacuum fittings shall be located to allow cleaning the pool with a 50 foot maximum length of hose. Vacuum fittings shall be mounted no more than 15 inches below the water level, flush with the pool walls, and shall be provided with a spring loaded safety cover which shall be in place at all times. Bag type cleaners which operate as ejectors on potable water supply pressure must be protected by a vacuum breaker. Cleaning devices shall not be used while the pool is open to bathers.
(13) Rate of flow indicators – A rate of flow indicator, reading in gpm, shall be installed on the return line. The rate of flow indicator shall be properly sized for the design flow rate and shall be capable of measuring from one-half to at least one and one-half times the design flow rate. The clearances upstream and downstream from the rate of flow indicator shall comply with manufacturer’s installation specifications.
(14) Heaters – Pool heaters shall comply with nationally recognized standards acceptable to the department and to the design engineer. Pools equipped with heaters shall have a fixed thermometer mounted in the pool recirculation line downstream from the heater outlet. Thermometers mounted on heater outlets do not meet this requirement. A sketch of any proposed heater installation including valves, thermometer, pipe sizes, and material specifications shall be submitted to the department and authorization obtained prior to installation. Piping and influent, effluent and bypass valves which allow isolation or removal of the heater from the system shall be provided. Materials used in solar and other heaters shall be non-toxic and acceptable for use with potable water. Heaters shall not prevent the attainment of the required turnover rate. Heaters shall comply with applicable heating codes. Heater replacement or addition meeting the provisions of this section does not constitute a modification.
(15) Pool waste water disposal – Pool waste water shall be discharged through an air gap; disposal shall be to sanitary sewers, storm sewers, drain fields, or by other means, in accordance with local municipal and building official requirements including obtaining all necessary permits. Each waste line shall have a unique air gap. Waste lines from different sources (e.g., pool, spa, overfill, sump pump) shall not be tied together, but may discharge into a common sump or receptacle after the air gap. Disposal of water from pools using D.E. powder shall be accomplished through separation tanks which are equipped with air bleed valves, bottom drain lines, and isolation valves, or through a settling tank with final disposal being acceptable to local authorities. D.E. separator tanks shall have a capacity as rated by the manufacturer, equal to the square footage of the filter system. All lines shall be sized to handle the expected flow. There shall not be a direct physical connection between any waste or drain line from a pool or recirculation system and any sewer line. Waste D.E. powder shall be collected and disposed of in a manner acceptable to local authorities and solid waste collectors.
(16) Disinfection and pH adjustment shall be added to the pool recirculation flow using automatic feeders meeting the requirement of NSF/ANSI Standard 50-2007. All chemicals shall be fed into the return line after the pump, heater and filters unless the feeder was designed by the manufacturer and approved by the NSF to feed to the collector tank or to the suction side of the pump. Feeding chlorinated isocyanurates disinfectant is prohibited in spas, wading pools and interactive water features, and these existing feeders shall be replaced with non-isocyanurate chlorinators, or equivalent, with a pH adjustment feeder on or before June 1, 2011. Dual or multiuse feeders can be used if approved for and feeding an acceptable rate of alternate disinfectant.
(a) Gas chlorination – When gas chlorination is utilized, the chlorinator shall be capable of continuously feeding a chlorine dosage of six mg/L to the recirculated flow of the filtration system. The application point for chlorine shall be located in the return line downstream of the filter, recirculation pump, heater, and flow meter, and as far as possible from the pool.
1. Gas chlorinators shall be located in above grade rooms and in areas which are inaccessible to unauthorized persons.
a. Chlorine rooms shall have: continuous forced draft ventilation capable of a minimum of one air change per minute with an exhaust at floor level to the outside, a minimum of 30 foot candles of illumination with the switch located outside and the door shall open out and shall not be located adjacent to the filter room entrance or the pool deck. A shatter-proof gas tight inspection window shall be provided.
b. Chlorine areas shall have a roof and shall be enclosed by a chain-link type fence at least six feet high to allow ventilation and prevent vandalism.
2. A gas mask, or a self-contained breathing apparatus, approved for use in chlorine gas contaminated air, shall be provided and shall be located out of the area of possible contamination.
3. When booster pumps are used with the chlorinator, the pump shall use recirculated pool water supplied via the recirculation filtration system. The booster pump shall be electrically interlocked with the recirculation pump to prevent the feeding of chlorine when the recirculation pump is not operating.
4. A means of weighing chlorine containers shall be provided. When 150 pound cylinders are used, platform type scales shall be provided and shall be capable of weighing a minimum of two full cylinders at one time. The elevation of the scale platform shall be within two inches of the adjacent floor level, and the facilities shall be constructed to allow easy placement of full cylinders on the scales.
5. Each cylinder shall be secured at all times, with 150 pound cylinders maintained in an upright position. A protective cap shall be in place at all times when the cylinder is not connected to the chlorinator.
(b) Hypohalogenation and Electrolytic chlorine generators – The hypohalogenation type feeder and electrolytic chlorine generators shall be adjustable from zero to full range. A rate of flow indicator is required on erosion type feeders. The feeders shall be capable of continuously feeding a dosage of 6 mg/L to the minimum required turnover flow rate of the filtration systems. Solution feeders shall be capable of feeding the above dosage using a ten percent sodium hypochlorite solution, or five percent calcium hypochlorite solution, whichever disinfectant is to be utilized at this facility. To prevent the disinfectant from siphoning or feeding directly into the pool or pool piping under any type failure of the recirculation equipment, an electrical interlock with the recirculation pump shall be incorporated into the system for electrically operated feeders. A flow sensor controller can also be used to turn off the feeders when flow is not sensed. The minimum size of the solution reservoirs shall be at least 50 percent of the maximum daily capacity of the feeder. The solution reservoirs shall be marked to indicate contents.
(c) Feeders for pH adjustment – Feeders for pH adjustment shall be provided on all pools. pH adjustment feeders shall be positive displacement type, shall be adjustable from zero to full range, and shall have an electrical interlock with the circulation pump to prevent discharge when the recirculation pump is not operating. When soda ash is used for pH adjustment, the maximum concentration of soda ash solution to be fed shall not exceed one-half pound soda ash per gallon of water. Feeders for soda ash shall be capable of feeding a minimum of three gallons of the above soda ash solution per pound of gas chlorination capacity. The minimum size of the solution reservoirs shall not be less than 50 percent of the maximum daily capacity of the feeder. The solution reservoirs shall be marked to indicate the contents.
(d) Ozone generating equipment may be used for supplemental water treatment on public swimming pools subject to the conditions of this section.
1. Ozone generating equipment electrical components and wiring shall comply with the requirements of the National Electrical Code and the manufacturer shall provide a certificate of conformance. The process equipment shall be provided with an effective means to alert the user when a component of this equipment is not operating.
2. Ozone generating equipment shall meet the NSF/ANSI Standard 50-2007.
3. The concentration of ozone in the return line to the pool shall not exceed 0.1 mg/L.
4. The injection point for ozone generating equipment shall be located in the pool return line after the filtration and heating equipment, prior to the halogen injection point, and as far as possible from the nearest pool return inlet with a minimum distance of four feet. Injection methods shall include a mixer, contact chamber, or other means of efficiently mixing the ozone with the recirculated water. The injection and mixing equipment shall not prevent the attainment of the required turnover rate of the recirculation system. Ozone generating equipment shall be equipped with a check valve between the generator and the injection point. Ozone generating equipment shall be equipped with an air flow meter and a means to control the flow. The generator shall be electrically interlocked with the recirculation pump to prevent the feeding of ozone when the recirculation pump is not operating. A flow sensor controller can also be used to turn off the feeder when flow is not sensed.
5. Ventilation requirements – Ozone generating equipment shall be installed in equipment rooms with either forced draft or cross draft ventilation. Below grade equipment rooms with ozone generators shall have forced draft ventilation and all equipment rooms with forced draft ventilation shall have the fan control switch located outside the equipment room door. The exhaust fan intake for forced draft ventilation and at least one vent grille for cross draft ventilation shall be located at floor level.
6. A self-contained breathing apparatus designed and rated by it’s manufacturer for use in ozone contaminated air shall be provided when ozone generator installations are capable of exceeding the maximum pool water ozone contact concentration of 0.1 milligrams per liter (mg/L). The self-contained breathing apparatus shall be available at all times and shall be used at times when the maintenance or service personnel have determined that the equipment room ozone concentration exceeds 10 mg/L. Ozone generator installations which require the self-contained breathing apparatus shall also be provided with Draeger type detector tube equipment which is capable of detecting ozone levels of 10 mg/L and greater.
7. In lieu of the above self contained breathing apparatus an ozone detector capable of detecting 1 mg/L may be used. Said detector must be capable of stopping the production of ozone, venting the room and sounding an alarm once ozone is detected.
(e) Ionization units may be used as supplemental water treatment on public pools subject to the condition of this paragraph.
1. Ionization equipment and electrical components and wiring shall comply with the requirements of the National Electrical Code and the manufacturer shall provide a certification of conformance.
2. Ionization equipment shall meet the NSF/ANSI Standard 50-2007, Circulation System Components and Related Materials for Swimming Pools, Spas/Hot Tubs, or equivalent, shall meet UL standards and shall be electrically interlocked with recirculation pump.
(f) Ultraviolet (UV) light disinfectant equipment may be used as supplemental water treatment on public pools (and additional treatment on IWFs) subject to the conditions of this paragraph and manufacturer’s specifications. UV is encouraged to be used to eliminate or reduce chlorine resistant pathogens, especially the protozoan Cryptosporidium.
1. UV equipment and electrical components and wiring shall comply with the requirements of the National Electrical Code and the manufacturer shall provide a certification of conformance to the department.
2. UV equipment shall meet UL standards and shall be electrically interlocked with recirculation pump(s) on all pools and with feature pump(s) on an IWF such that when the UV equipment fails to produce the required dosage as measured by an automated sensor, the feature pump(s) are disabled so the water features do not operate.
3. UV equipment shall be validated by a capable party that it delivers the required and predicted UV dose at the validated flow, lamp power and water UV transmittance conditions, and has complied with all professional practices summarized in the USEPA Ultraviolet Disinfectant Guidance Manual dated November, 2006, which is publication number EPA 815-R-06-007 available from the department at http://www.floridashealth.org/Environment/water/swim/index.html or at http://www.epa.gov/safewater/disinfect ion/lt2/pdfs/guide_lt2_uvguidance.pdf.
4. UV equipment shall constantly produce a validated dosage of at least 40 mJ/cm2 (milliJoules per square centimeter) at the end of lamp life.
5. The UV equipment shall not be located in a side stream flow and shall be located to treat all water returning to the pool or water features.
(17) Water features such as waterfalls or fountains in pools may use up to 20% of the return water from the filter system, however all waters used in the feature shall not be counted toward attaining the designed turnover rate. Return piping system shall be designed and capable of handling the additional feature flow when the feature is turned off. Features that require more than 20% of the flow rate shall be supplied by an additional pump that drafts from a suitable collector tank. All water features that utilize water from the pool shall be designed to return the water to the pool. Spray features mounted in the pool deck shall be flush with the pool deck and shall be designed with the safety of the pool patron in mind.
Rulemaking Authority 381.006, 514.021 FS. Law Implemented 381.006, 514.021, 514.03, 514.031, 514.05, 514.06 FS. History-New 10-5-93, Formerly 10D-5.136, Amended 12-27-98, 5-27-04, 5-24-09.