ABOVE-GROUND/ONGROUND POOL. See "Swimming pool."
ADMINISTRATIVE AUTHORITY. The individual official, board, department or agency established and authorized by a state, county, city or other political subdivision created by law to administer and enforce the provisions of the swimming pool code as adopted or amended.
APPROVED. Accepted or acceptable under an applicable specification stated or cited in this code, or accepted as suitable for the proposed use under procedures and power of the administrative authority.
APPROVED SAFETY COVER. A manually or power-applied safety pool cover that meets all of the performance standards of the ASTM International in compliance with ASTM F 1346.
APPROVED TESTING AGENCY. An organization primarily established for the purpose of testing to approved standards and approved by the administrative authority.
BACKWASH PIPING. See "Filter waste discharge piping."
BARRIER. A fence, dwelling wall or nondwelling wall or any combination thereof which completely surrounds the swimming pool and obstructs access to the swimming pool, especially access from the residence or from the yard outside the barrier.
BODY FEED. Filter aid fed into a diatomite-type filter throughout the filtering cycle.
CARTRIDGE FILTER. A filter using cartridge-type filter elements.
CHEMICAL PIPING. Piping which conveys concentrated chemical solutions from a feeding apparatus to the circulation piping.
CIRCULATION PIPING SYSTEM. Piping between the pool structure and the mechanical equipment. Usually includes suction piping, face piping and return piping.
COMBINATION VALVE. A multipart valve intended to perform more than one function.
DESIGN HEAD. Total head requirement of the circulation system at the design rate of flow.
DIATOMITE (DIATOMACEOUS EARTH). A type of filter aid.
DIATOMITE-TYPE FILTER. A filter designed to be used with filter aid.
DIRECT ACCESS FROM THE HOME. Means any opening which discharges into the "perimeter" of the pool or any opening in an exterior dwelling wall, or interior wall (for indoor pools) which faces the pool.
EXIT ALARM. A device that makes audible, continuous alarm sounds when any door or window which permits access from the residence to any pool that is without an intervening enclosure is opened or left ajar.
FACE PIPING. Piping, with all valves and fittings, which is used to connect the filter system together as a unit.
FILTER. Any apparatus by which water is clarified.
FILTER AID. A nonpermanent type of filter medium or aid such as diatomite, alum, etc.
FILTER CARTRIDGE. A disposable or renewable filter element which generally employs no filter aid.
FILTER ELEMENT. That part of a filter which retains the filter medium.
FILTER MEDIUM. Fine material which entraps the suspended particles and removes them from the water.
FILTER RATE. Average rate of flow per square foot of filter area.
FILTER ROCK. Specially graded rock and gravel used to support filter sand.
FILTER SAND. A specially graded type of permanent filter medium.
FILTER SEPTUM. That part of the filter element in a diatomite-type filter upon which a cake of diatomite or other nonpermanent filter aid may be deposited.
FRESH WATER. Those waters having a specific conductivity less than a solution containing 6,000 ppm of sodium chloride.
HIGH-RATE SAND FILTER. A sand filter designed for flows in excess of 5 gpm per square feet.
HOT TUB. See "Swimming pool."
INGROUND POOL. See "Swimming pool."
INLET FITTING. Fitting or fixture through which circulated water enters the pool.
MEDICALLY FRAIL ELDERLY PERSON. Means any person who is at least 65 years of age and has a medical problem that affects balance, vision, or judgment, including but not limited to a heart condition, diabetes, or Alzheimer's disease or any related disorder.
MESH SAFETY BARRIER. A combination of materials, including fabric, posts, and other hardware to form a barrier around a swimming pool.
POOL. See "Swimming pool."
POOL DEPTHS. The distance between the floor of pool and the maximum operating water level.
POOL PERIMETER. A pool perimeter is defined by the limits of the pool deck, its surrounding area including yard area on same property, and any dwelling or nondwelling wall or any combination thereof which completely surrounds the pool.
PORTABLE POOL. A prefabricated pool which may be erected at the point of intended use and which may be subsequently disassembled and reerected at a new location. Generally installed on the surface of the ground and without excavation.
PRECOAT. In a diatomite-type filter, the initial coating or filter aid placed on the filter septum at the start of the filter cycle.
RAPID SAND FILTER. A filter designed to be used with sand as the filter medium and for flows not to exceed 5 gpm per square foot.
RECEPTOR. An approved plumbing fixture or device of such material, shape and capacity as to adequately receive the discharge from indirect waste piping, so constructed and located as to be readily cleaned.
RETURN PIPING. That portion of the circulation piping which extends from the outlet side of the filters to the pool.
SALINE WATER. Those waters having a specific conductivity in excess of a solution containing 6,000 ppm of sodium chloride.
SEPARATION TANK. A device used to clarify filter rinse or waste water. Sometimes called a reclamation tank.
SKIM FILTER. A surface skimmer combined with a vacuum diatomite filter.
SPA, NONPORTABLE. See "Swimming pool."
SPA, PORTABLE. Nonpermanent structure intended for recreational bathing, in which all controls and water heating and water circulating equipment are an integral part of the product and which is cord-connected and not permanently electrically wired.
SUCTION PIPING. That portion of the circulation piping located between the pool structure and the inlet side of the pump and usually includes main outlet piping, skimmer piping, vacuum piping and surge tank piping.
SURFACE SKIMMER. A device generally located in the pool wall which skims the pool surface by drawing pool water over a self-adjusting weir.
SWIMMING POOL, PRIVATE. Any structure, located in a residential area, that is intended for swimming or recreational bathing and contains water over 24 inches (610 mm) deep including but not limited to inground, above-ground, and onground swimming pools, hot tubs, and nonportable spas.
SWIMMING POOL, INDOOR. A swimming pool which is totally contained within a structure and surrounded on all four sides by walls of said structure.
SWIMMING POOL, OUTDOOR. Any swimming pool which is not an indoor pool.
SWIMMING POOL, PUBLIC. A water-tight structure of concrete, masonry, fiberglass, stainless steel or plastic which is located either indoors or outdoors, used for bathing or swimming by humans, and filled with a filtered and disinfected water supply, together with buildings, appurtenances and equipment used in connection therewith. A public swimming pool or public pool shall mean a conventional pool, spatype pool, wading pool, special purpose pool or water recreation attraction, to which admission may be gained with or without payment of a fee and includes, pools operated by or serving camps, churches, cities, counties, day care centers, group home facilities for eight or more clients, health spas, institutions, parks, state agencies, schools, subdivisions; or the cooperative living-type projects of five or more living units, such as apartments, boarding houses, hotels, mobile home parks, motels, recreational vehicle parks and townhouses.
SWIMMING POOL, RESIDENTIAL. See "Swimming pool, private."
TURNOVER TIME. The time in hours required for the circulation system to filter and recirculate a volume of water equal to the pool volume.
VACUUM FITTING. A fitting in the pool which is used as a convenient outlet for connecting the underwater suction cleaning equipment.
VACUUM PIPING. The piping from the suction side of a pump connected to a vacuum fitting located at the pool and below the water level.
WIDTH AND/OR LENGTH. Actual water dimension taken from wall to wall at the maximum operating water level.
YOUNG CHILD. Means any person under the age of six years.
For any items not specifically covered in these requirements, the administrative authority is hereby authorized to require that all equipment, materials, methods of construction and design features shall be proven to function adequately, effectively and without excessive maintenance and operational difficulties.R4501.4.2.1. Flood hazard areas.
Pools installed in flood hazard areas established in Section R322 shall comply with Section R322.2.4 (A Zones) or R318.104.22.168 in coastal high-hazard areas (V Zones).
Every swimming pool shall be equipped complete with approved mechanical equipment consisting of filter, pump, piping valves and component parts.
Pool piping shall be designed so the water velocity will not exceed 10 feet per second (3048 mm/s) for pressure piping and 8 feet per second (2438 mm/s) for suction piping, except that the water velocity shall not exceed 8 feet per second (2438 mm/s) in copper tubing. Main suction outlet velocity must comply with ANSI/APSP 7.
All piping materials shall be installed in strict accordance with the manufacturer's installation standards.
Pumps shall have design capacity at the following heads:
- Pressure diatomaceous earth — At least 60 feet (18 288 mm).
- Vacuum diatomaceous earth — 20-inch (508 mm) vacuum on the suction side and 40-foot (12 192 mm) total head.
- Rapid sand — At least 45 feet (13 716 mm).
- High rate sand — At least 60-feet (18 288 mm).
All pool piping shall be tested and proved tight to the satisfaction of the administrative authority, under a static water or air pressure test of not less than 35 pounds per square inch (psi) (241 kPa) for 15 minutes.
Exception: Circulating pumps need not be tested as required in this section.
- All doors and windows providing direct access from the home to the pool shall be equipped with an exit alarm complying with UL 2017 that has a minimum sound pressure rating of 85 dBA at 10 feet (3048 mm). Any deactivation switch shall be located at least 54 inches (1372 mm) above the threshold of the access. Separate alarms are not required for each door or window if sensors wired to a central alarm sound when contact is broken at any opening.
- Screened or protected windows having a bottom sill height of 48 inches (1219 mm) or more measured from the interior finished floor at the pool access level.
- Windows facing the pool on floor above the first story.
- Screened or protected pass-through kitchen windows 42 inches (1067 mm) or higher with a counter beneath.
- All doors providing direct access from the home to the pool must be equipped with a self-closing, self-latching device with positive mechanical latching/locking installed a minimum of 54 inches (1372 mm) above the threshold, which is approved by the authority having jurisdiction.
- A swimming pool alarm that, when placed in a pool, sounds an alarm upon detection of an accidental or unauthorized entrance into the water. Such pool alarm must meet and be independently certified to ASTM Standard F2208, titled "Standard Safety Specification for Residential Pool Alarms," which includes surface motion, pressure, sonar, laser, and infrared alarms. For purposes of this paragraph, the term "swimming pool alarm" does not include any swimming protection alarm device designed for individual use, such as an alarm attached to a child that sounds when the child exceeds a certain distance or becomes submerged in water.
- The barrier feature is not subject to natural changes, deviations, or alterations and is capable of providing an equivalent level of protection as that provided by the code.
- The barrier feature clearly impedes, prohibits or restricts access to the swimming pool or spa.
- Individual component vertical support posts shall be capable of resisting a minimum of 52 pounds (229 N) of horizontal force prior to breakage when measured at a 36-inch (914 mm) height above grade. Vertical posts of the child mesh safety barrier shall extend a minimum of 3 inches (76 mm) below deck level and shall be spaced no greater than 36 inches (914 mm) apart.
- The mesh utilized in the barrier shall have a minimum tensile strength according to ASTM D 5034 of 100 pounds per foot (149 kg/m), and a minimum ball burst strength according to ASTM D 3787 of 150 pounds per foot (223 kg/m). The mesh shall not be capable of deformation such that a 1/4 -inch (6.4 mm) round object could pass through the mesh.
The mesh shall receive a descriptive performance rating of no less than "trace discoloration" or "slight discoloration" when tested according to ASTM G 53 (Weatherability, 1,200 hours).
- When using a molding strip to attach the mesh to the vertical posts, this strip shall contain, at a minimum, #8 by 1/2-inch (12.7 mm) screws with a minimum of two screws at the top and two at the bottom with the remaining screws spaced a maximum of 6 inches (152 mm) apart on center.
- Patio deck sleeves (vertical post receptacles) placed inside the patio surface shall be of a nonconductive material.
- A latching device shall attach each barrier section at a height no lower than 45 inches (11 613 mm) above grade. Common latching devices that include, but are not limited to, devices that provide the security equal to or greater than that of a hook-and-eye-type latch incorporating a spring actuated retaining lever (commonly referred to as a safety gate hook).
- The bottom of the child mesh safety barrier shall not be more than 1 inch (25 mm) above the deck or installed surface (grade).
All pools whether public or private shall be provided with a ladder or steps in the shallow end where water depth exceeds 24 inches (610 mm). In private pools where water depth exceeds 5 feet (1524 mm), there shall 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 corner.
Final electrical and barrier code inspection shall be completed prior to filling the pool with water.
Rapid sand filters (flow up to 5 gpm per square foot) shall be constructed in accordance 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 backwashing of said filter and shall provide backwash flow rates of at least 12 gpm per square foot for rapid sand filters or 15 gpm per square foot for high rate sand filters. R4501.20.1.2 Instructions.
Every filter system shall be provided with written operating instructions. R4501.20.1.3 Filter system equipment.
On pressure-type filters, a means shall be provided to permit the release of internal pressure. A filter incorporating an automatic internal air release as its principal means of air release shall have lids which provide a slow and safe release 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.
Diatomite-type filters shall be designed 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. R4501.20.2.2 Filter aid.
Provision shall be made to introduce filter aid into the filter in such a way as to evenly precoat the filter septum.
In areas of anticipated water table, an approved hydrostatic relief device shall be installed.