Ariz. Admin. Code § 18-5-201
"Air induction system" means a system whereby a volume of air is induced into a hollow ducting in a spa floor, bench, or wall. An air induction system is activated by an air power blower and is separate from the water circulation system.
"Artificial lake" means a man-made lake, lagoon, or basin, lined or unlined, with a surface area equal to or greater than two acres (87,120 square feet), that is used or intended to be used for water contact recreation.
"Backwash" means the process of thoroughly cleaning a filter by the reverse flow of water through the filter.
"Barrier" means a fence, wall, building, or landscaping that obstructs access to a public or semipublic swimming pool or spa.
"Cartridge filter" means a depth, pleated, or surface-type filter component with fixed dimensions that is designed to remove suspended particles from water flowing through the filter.
"Construct" means to build or install a new public or semipublic swimming pool or spa or to enlarge, deepen, or make a major modification to an existing public or semipublic swimming pool or spa.
"Coping" means the cap on a swimming pool or spa wall that provides a finished edge around the swimming pool or spa.
"Cross-connection" means any physical connection or structural arrangement between a potable water system and the piping system for a public or semipublic swimming pool or spa through which it is possible to introduce used water, gas, or any other substance into the potable water system. A bypass arrangement, jumper connection, removable section, swivel or change-over device, or any other temporary or permanent device that may cause backflow is a cross-connection.
"Deck" means a hard surface area immediately adjacent or attached to a swimming pool or spa that is designed for sitting, standing, or walking.
"Deep area" means the portion of a public or semipublic swimming pool that is more than 5 feet in depth.
"Discharge piping" means the portion of the circulation system that carries water from the filter back to the swimming pool or spa.
"Diving area" means the area of a public or semipublic swimming pool that is designated for diving from a diving board, diving platform, or starting block.
"Fill-and-draw swimming pool or spa" means a swimming pool or spa where the principal means of cleaning is the complete removal of the used water and its replacement with potable water.
"Filtration rate" means the rate of water flowing through a filter during the filter cycle expressed in gallons per minute per square foot of effective filter area.
"Flow-through swimming pool or spa" means a swimming pool or spa where new water enters the swimming pool or spa to replace an equal quantity of water that constantly flows out.
"Freeboard" means the vertical wall section of a swimming pool or spa wall between the waterline and the deck.
"Hose bibb" means a faucet with a threaded nozzle to which a hose may be attached.
"Hydrotherapy jet" means a fitting that blends air and water and creates a high-velocity, turbulent stream of air-enriched water for injection into a spa.
"Make-up water" means fresh water used to fill or refill a swimming pool or spa.
"Maximum bathing load" means the design capacity or the maximum number of users that a public or semipublic swimming pool or spa is designed to hold.
"Natural bathing place" means a lake, pond, river, stream, swimming hole, or hot springs which has not been modified by man.
"Operate" means to run, maintain, or otherwise control or direct the functioning of a public or semipublic swimming pool or spa.
"Overflow collection system" means equipment designed to remove water from a swimming pool or spa, including gutters, overflows, surface skimmers, and other surface water collection systems of various designs and manufacture.
"Potable water" means drinking water.
"Private residential spa" means a spa at a private residence used only by the owner, members of the owner's family, and invited guests, or a spa that serves a housing group consisting of no more than three living units [for example, duplexes or triplexes].
"Private residential swimming pool" means a swimming pool at a private residence used only by the owner, members of the owner's family, and invited guests, or a swimming pool that serves a housing group consisting of no more than three living units [for example, duplexes or triplexes].
"Public spa" means a spa that is open to the public with or without a fee, including a spa that is operated by a county, municipality, political subdivision, school district, university, college, or a commercial establishment whose primary business is the operation of a spa.
"Public swimming pool" means a swimming pool that is open to the public with or without a fee, including a swimming pool that is operated by a county, municipality, political subdivision, school district, university, college, or a commercial establishment whose primary business is the operation of a swimming pool.
"Recessed treads" means a series of vertically spaced, preformed stepholes in a swimming pool wall.
"Return inlet" means an aperture or fitting through which filtered water returns to a swimming pool or spa.
"Rope and float line" means a continuous line not less than 3/4 inch in diameter that is supported by buoys and attached to opposite sides of a swimming pool to separate areas of the swimming pool.
"Semi-artificial bathing place" means a natural bathing place that has been modified by man.
"Semipublic spa" means a spa operated for the residents of lodgings such as hotels, motels, resorts, apartments, condominiums, townhouse complexes, trailer courts, mobile home parks, or similar establishments. A semipublic spa includes a spa that is operated by a neighborhood or community association for the residents of the community and their guests and any spa at a country club, health club, camp, or similar establishment where the primary business of the establishment is not the operation of a spa and where the use of the spa is included in the fee for the primary use of the establishment.
"Semipublic swimming pool" means a swimming pool operated for the residents of lodgings such as hotels, motels, resorts, apartments, condominiums, townhouse complexes, trailer courts, mobile home parks, or similar establishments. A semipublic swimming pool includes a swimming pool that is operated by a neighborhood or community association for the residents of the community and their guests and a swimming pool at a country club, health club, camp, or similar establishment where the primary business of the establishment is not the operation of a swimming pool and where the use of the swimming pool is included in the fee for the primary use of the establishment.
"Shallow area" means the portion of a public or semipublic swimming pool that is 5 feet or less in depth.
"Slip-resistant" means a surface that has a static coefficient of friction [wet or dry] of at least 0.50.
"Spa" means an artificial basin, chamber, or tank of irregular or geometric shell design that is intended only for bathing or soaking and that is not drained, cleaned, or refilled for each user. A spa may include features such as hydrotherapy jet circulation, hot water, cold water mineral baths, or an air induction system. Industry terminology for a spa includes "hydrotherapy pool," "whirlpool," "hot tub," and "therapy pool."
"Special use pool" means a swimming pool intended for competitive aquatic events, aquatic exercise, or lap swimming. A special use pool includes a wave action pool, exit pool for a water slide, swimming pool that is part of an attraction at a water recreation park, water volleyball pool, or a swimming pool with special features used for training and instruction.
"Suction outlet" means the aperture or fitting through which water is withdrawn from a swimming pool or spa.
"Suction piping" means the water circulation system piping that carries water from a swimming pool or spa to the filter.
"Swimming pool" means an artificial basin, chamber, or tank that is designed for swimming or diving.
"Turnover rate" means the number of hours required to circulate a volume of water equal to the capacity of the swimming pool or spa.
"User" means a person who uses a swimming pool, spa, or adjoining deck area.
"Wading pool" means a shallow swimming pool used for bathing and wading by small children.
"Water circulation system" means an arrangement of mechanical equipment connected to a swimming pool or spa by piping in a closed loop that directs water from the swimming pool or spa to the filtration and disinfection equipment and returns the water to the swimming pool or spa.
"Water circulation system components" means the mechanical components that are part of a water circulation system of a swimming pool or spa, including pumps, filters, valves, surface skimmers, ion generators, electrolytic chlorine generators, ozone process equipment, and chemical feeding equipment.
"Water level" means either:
a. On swimming pools and spas with skimmer systems, the midpoint of the operating range of the skimmers, or
b. On swimming pools and spas with overflow gutters, the height of the overflow rim of the gutter.
Ariz. Admin. Code § R18-5-201