Section 675IAC14-4.3-271. Swimming pools; definitions

   Section S4202-Definitions is added as follows:

(1) S4202.1 Definitions; general. For the purpose of this code, the definitions in this section apply throughout this chapter.

(2) S4202.2 Definitions "A"

(A) "Abrasion hazard" means a sharp or rough surface that could cause injury under normal use.

(B) "Accessible" means, when applied to a fixture, connection, appliance, or equipment, having access thereto, but may require the removal of an access panel, door, or similar obstruction. "Readily accessible" means direct access without the necessity of removing any panel, door, or similar obstruction.

(C) "Agitation" means the mechanical or manual movement to dislodge the filter aid and dirt from the filter element.

(D) "Airbreak" means a physical separation that may be a low inlet into the indirect waste receptor from the fixture, appliance, or device indirectly connected.

(E) "Air bump assist backwash" means, in a diatomite type filter, the compressing of a volume of air in the filter effluent chamber (by means of an air compressor or by the water pressure from the recirculating pump) that, when released, rapidly decompresses and forces water in the filter tank through the elements in a reverse direction dislodging the filter aid and accumulated dirt and carrying them to waste.

(F) "Airgap" means the unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet conveying water or waste to a tank, plumbing fixture receptor, or other device and the flood level rim of the receptacle.

(G) "Approved" means, as to materials, equipment, design, and types of construction, acceptance by the code official by one (1) of the following methods:

(i) Investigation or tests conducted by recognized authorities.

(ii) Investigation or tests conducted by technical or scientific organizations.

(iii) Accepted principles.

The investigation, tests, or principles shall establish that the materials, equipment, and types of construction are safe for the intended purpose.

(H) "Approved agency" means an established and recognized agency regularly engaged in conducting tests or furnishing inspection services, when such agency has been approved by the state building commissioner or is listed in 675 IAC 12-6-1.

(3) S4202.3 Definitions "B"

(A) "Backwash" means the process of thoroughly cleaning the filter medium or elements, or both, by the reverse flow of water.

(B) "Backwash cycle" means the time required to backwash the filter system thoroughly.

(C) "Backwash pipe" means a type of "filter waste discharge piping" as defined in subdivision (7)(N).

(D) "Backwash rate" means the rate of application of water through a filter during the backwash cycle expressed in gallons per minute per square foot of effective filter area.

(E) "Basin" means any vessel constructed of man-made materials and designed to hold water to be used as a swimming pool, spa, or hot tub.

(F) "Bather" means a person using the pool and adjoining deck areas for the purpose of water sports or related activities.

(G) "Body feed" means the continuous addition of controlled amounts of filter aid during the operation of a diatomite type filter to maintain a permeable filter cake. If added as a slurry, this may be referred to as a slurry feed.

(H) "Booster pump system" means a device used to provide hydraulic support for certain types of equipment such as the following:

(i) Pool cleaning systems.

(ii) Chlorinators.

(iii) Solar systems.

(iv) Therapy jets.

(v) Water features.

(I) "Breakpoint chlorination" means the addition of a sufficient amount of chlorine to water to destroy the combined chlorine present.

(4) S4202.4 Definitions "C"

(A) "Cartridge" means a filter component of either the depth or surface type having fixed dimensions and designed to remove suspended particles from water flowing through the unit.

(B) "Cartridge, depth type" means a filter cartridge with a medium relying on penetration of particulates into the medium for removal and providing adequate holding capacity of such particulates.

(C) "Cartridge, surface type" means a filter cartridge with a medium relying on retention of particles on the surface of the cartridge for removal.

(D) "Chemical feeder" means any device used to feed chemicals such as sanitizers, pH adjusters, algicide, etc. into a pool or spa.

(E) "Chemical feeder output rate" means the weight or volume of active ingredients delivered by a chemical feeder expressed in units of weight of volume and time.

(F) "Chemical feed rate indicator" means a mechanism that will produce reproducible results expressed in units of weight or volume of chemical per unit of time or per unit of volume of water. The mechanism may:

(i) be a direct reading instrument; or

(ii) require the use of a reference chart.

(G) "Chemical piping" means piping that conveys concentrated chemical solutions from a feeding apparatus to the circulation piping.

(H) "Circulation system" means an arrangement of mechanical equipment or components, or both, designed to ensure even distribution of heat, chemicals, and filtrated water throughout the pool or spa. The term includes filters, pumps, strainers, disinfectant, or other chemical feed devices, piping, inlets, drains, overflow fittings, and other appurtenances.

(I) "Code official" means the local building official as authorized under IC 36-7-2-9 and local ordinance.

(J) "Corrosion-resistant" means capable of maintaining original surface characteristics under the prolonged influence of the use environment.

(K) "Cove" means the radius between the wall and the floor.

(5) S4202.5 Definitions "D"

(A) "Decks" means those areas surrounding a pool that are specifically constructed or installed for use by bathers.

(B) "Deep areas" means the portions of a pool having water depths in excess of five (5) feet.

(C) "Design head" means the total head requirement of the circulation system at the design rate of flow.

(D) "Design rate of flow (design filter rate)" means the rate of flow in a system that is used for design calculation. (The volume of the pool, spa, or hot tub in gallons divided by the number of minutes in the turnover time.)

(E) "Diatomite filter" means one designed to filter water through a thin layer of filter aid such as diatomaceous earth or volcanic ash. Diatomite filters may be of the pressure or vacuum type.

(F) "Distribution system, lower" means those devices used in the bottom of a sand type filter to:

(i) collect the water uniformly during the filtering; and

(ii) distribute the backwash water uniformly during the backwashing.

(G) "Distribution system, upper" means those devices designed to distribute the water entering a sand type filter in a manner such as to prevent movement or migration of the filter media. This system shall also properly collect water during filter backwashing unless other means are provided.

(H) "Diving board" means a recreational mechanism for entering a swimming pool, consisting of a semirigid board that derives its elasticity through the use of a fulcrum mounted below the board.

(I) "Diving equipment, manufactured" means manufactured diving equipment and shall include diving boards, jump boards, and spring boards. Architectural features such as decorative rocks and elevated bond beams are not considered to be manufactured diving equipment.

(6) S4202.6 Definitions "E"

"Effective filtration area" means the total surface area through which the design flow rate will be maintained during filtration.

(7) S4202.7 Definitions "F"

(A) "Face piping" means the piping, with all valves and fittings, that is used to connect the filter system together as a unit.

(B) "Filter" means a device that separates solid particles from water by circulating the water through a porous substance(a filter medium element).

(C) "Filter aid" means a type of finely divided media used to coat a septum type filter, usually diatomaceous earth or volcanic ash. (Note: Alum, as used on the bed of a sand filter, is also referred to as a filter aid.)

(D) "Filter, cartridge" means a filter that uses a porous cartridge as its filter medium.

(E) "Filter cycle" means the operating time between cleaning or backwash cycles.

(F) "Filter, diatomaceous earth" means a filter that uses a thin layer of diatomaceous earth as its filter medium that periodically must be replaced.

(G) "Filter element" means that part of a filter that supports the surface upon which the filter aid is deposited (usually in diatomite filters).

(H) "Filter media" means the finely graded material that entraps suspended particles (sand, anthracite, etc.).

(I) "Filter, permanent medium" means a filter that under normal use will not have to be replaced.

(J) "Filter rate" means the rate of application of water to a filter expressed in gallons per minute per square foot of effective filter area.

(K) "Filter rock" means graded, rounded rock or gravel, or both, not subject to degradation by common pool chemical used to support filter media.

(L) "Filter sand" means a specially graded type of permanent filter media.

(M) "Filter septum" means 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.

(N) "Filter waste discharge piping" means piping that conducts wastewater from a filter to a drainage system. Connection to drainage system is made through an airgap or other approved method.

(O) "Floor" means the interior bottom pool surface and consists of that surface from a horizontal plane up to a maximum of a forty-five (45) degree slope.

(P) "Flow balance valve" means a device to regulate the effluent from the skimmer housing of each of a combination of two (2) or more surface skimmers.

(Q) "Freeboard" means the clear vertical distance in a sand type filter between the top of the filter media and the lowest outlet of the upper distribution system.

(R) "Fresh water" means water having a specific conductivity less than a solution containing six thousand (6,000) parts per million of sodium chloride.

(S) "Friction loss" means the pressure drop expressed in feet of water or psi caused by liquid flowing through the piping and fittings.

(8) S4202.8 Definitions "H"

(A) "Head loss" means the total pressure drop in pounds per square inch (kilo Pascals) or feet (meters) or head between the inlet and the outlet of a component.

(B) "High rate sand filter" means a sand filter designed for flows in excess of five (5) gallons per minute per square foot.

(C) "Hydrojet booster pump system" means a system whereby one (1) or more hydrojets are activated by the use of a pump that is completely independent of the filtration and heating system of a spa.

(D) "Hydrojets" means a fitting that blends air and water creating a high velocity, turbulent stream of air enriched water.

(9) S4202.9 Definitions "I"

(A) "Indirect waste pipe" means a pipe that does not connect directly with the drainage system but conveys liquid wastes by discharging into a plumbing fixture, interceptor, or receptacle that is directly connected to the drainage system.

(B) "Inlet fitting" means a fitting or fixture through which circulated or hydrojetted water enters a pool, spa, or hot tub.

(C) "Interactive play attraction" means a water attraction, including, but not limited to, splash pads, spray pads, and manufactured devices using sprayed, jetted, or other water sources contacting the users, not incorporating standing or captured water as part of the user activity area, and not utilizing a pool or spa circulation system.

(10) S4202.10 Definitions "J"

"Jump board" means a recreational mechanism that has a coil spring, leaf spring, or comparable device located beneath the board that is activated by the force exerted in jumping on the board.

(11) S4202.11 Definitions "L"

(A) "Ladders" means the following:

(i) "Deck ladder" means a ladder for deck access from outside the pool.

(ii) "In-pool ladder" means a ladder located in a pool to provide ingress and egress from the deck.

(iii) "Limited access ladder" means a ladder with provision for making entry inaccessible when a pool is not in use, that is, swing-up, slide-up, or equivalent.

(B) "Liner" means the membrane that acts as a container for the water, usually categorized as one (1) of the following:

(i) "Expandable liner" means a liner that is constructed of a material that has the capability of stretching into a greater depth of irregular shape other than the original constructed dimensions.

(ii) "Hopper liner" means a liner that is used to obtain greater depth by geometrical pattern construction on the liner bottom or floor to fit a predetermined size and shape.

(C) "Listed" means equipment or materials included in a list published by an organization engaged in product evaluation, that maintains periodic inspection of production of listed equipment or materials, and whose listing states either that the equipment or material meets appropriate standards or has been tested and found suitable for use in a specified manner.

(D) "Lower distribution system" (underdrain) means those devices used in the bottom of a permanent medium filter to collect the water during the filtering and to distribute the water during the backwashing.

(12) S4202.12 Definitions "M"

(A) "Main outlet" means the outlet fitting or fittings at or near the deepest portion of a swimming pool, spa, or hot tub through which water passes to the recirculating system. This outlet is often referred to as the "main drain".

(B) "Make-up water" means fresh water used to fill or refill the pool.

(C) "Multiport valve" means a valve for various filter operations, which combines in one (1) unit the function of two (2) or more single direct flow valves.

(13) S4202.13 Definitions "N"

(A) "Net positive suction head (NPSH)" means the head available at the entrance or eye of an impeller to move and accelerate the water entering the eye. This head is the gauge pressure at the suction flange of the pump plus the velocity head.

(B) "Nonswimming area" means any portion of a pool where water depth, offset ledges, or similar irregularities would prevent normal swimming activities.

(C) "NPSH, available" means a function of the system in which the pump operates. The available NPSH at the desired rate of flow.

(D) "NPSH, required" means a function of the pump design that varies among different makes, and a valve that must be supplied by the pump manufacturer.

(14) S4202.14 Definitions "P"

(A) "Perimeter overflow system" means a continuous channel formed into the sidewall entirely around the perimeter of the pool, unless interrupted by steps, into which surface pool water is continuously drawn during normal operation to provide a skimming action.

(B) "Pinching hazard" means any configuration of components that would pinch or entrap the fingers or toes of a bather.

(C) "Pool" includes the following:

(i) "Combination pool" means a pool used for swimming and diving.

(ii) "Vanishing edge pool" means a pool where the top of one (1) or more of the basin wall or walls is submerged with no adjacent deck or decks.

(iii) "Wading pool" means a shallow pool having a maximum depth of twenty-four (24) inches and intended for children's play.

(iv) "Whirlpool". See "Spa".

(v) "Zero-depth entry pool" means a water attraction having a sloped entrance to where the water depth is zero (0) inches at the shallowest point.

(D) "Pool depth" means the distance between the floor of pool and the waterline.

(E) "Pool plumbing" means all chemical, circulation, filter waste discharge piping, deck drainage, and water filling systems.

(F) "Positive displacement" means the mechanical displacement of a volume of fluid.

(G) "Precipitate" means a solid material that:

(i) is forced out of a solution by some chemical reaction; and

(ii) may settle out or remain as a haze in suspension (turbidity).

(H) "Precoat" means the initial coating of filter aid on the septum of a diatomaceous earth filter.

(I) "Pump discharge pressure" means the actual gauge reading measured in pounds per square inch taken at the discharge outlet of a pump.

(J) "Puncture hazard" means any surface or protrusion that would puncture a bather's skin under casual contact.

(15) S4202.15 Definitions "R"

(A) "Rapid sand filter" means a filter designed to be used with sand as the filter media.

(B) "Rated pressure" means that pressure that is equal to or less than the designed pressure and appears on the data plate of the equipment.

(C) "Receptor" means 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.

(D) "Recessed treads" means a series of vertically spaced cavities in the pool wall creating tread areas for steps.

(E) "Removable" means capable of being disassembled with the use of only a simple tool such as a screwdriver, pliers, or a wrench.

(F) "Return piping" means that part of the piping between the filter and the pool or spa through which passes the filtered water. (This piping frequently is referred to as "effluent piping".)

(G) "Rope and float line" (transition rope) means a continuous line not less than one-fourth (1/4) inch in diameter that is supported by buoys and attached to opposite sides of a pool to separate the deep and shallow ends.

(16) S4202.16 Definitions "S"

(A) "Saline water" means water having a specific conductivity in excess of a solution containing six thousand (6,000) parts per million of sodium chloride.

(B) "Separation tank" means a device used to clarify filter rinse or wastewater. It is sometimes called a "reclamation tank".

(C) "Septum" means that part of the filter element consisting of cloth, wire screen, or other porous material on which the filter cake is deposited.

(D) "Shallow areas" means those portions of a pool ranging in water depth from two (2) to five (5) feet.

(E) "Skim filter" means a surface skimmer combined with a vacuum filter.

(F) "Spa" means any spa that incorporates hot water jets, cold water jets, aeration systems, or any combination of the same for hydromassage.

(G) "Spa, permanent" means a spa in which the water-heating and water-circulating equipment is not an integral part of the product. Permanent spas may employ:

(i) separate components such as an individual filter, pump, heater, and controls; or

(ii) assembled combinations of various components.

(H) "Spa, portable, residential" means a spa in which all control, water-heating, and water-circulating equipment is an integral part of the product. Portable residential spas may be permanently wired or cord-connected. The spa shall be movable and aboveground.

(I) "Spray rinse, manual" means a spray system intended to be used manually for the washing of filter aid or accumulated dirt, or both, from a filter surface either in place or after removal from the filter tank. This is usually accomplished by means of a hose and nozzle.

(J) "Static suction lift" means the vertical distance in feet from the center line of the pump impeller to the level of water in the pool.

(K) "Steps" means a tread or series of treads extending down from the deck and terminating at the pool bottom.

(L) "Steps, recessed" means a step or series of steps that are recessed so that all risers are located outside the pool wall.

(M) "Steps, recessed steps, ladders, and recessed treads" means methods of pool ingress and egress that may be used alone or in conjunction with one another.

(N) "Strainer" means a device used to remove hair, lint, leaves, or other coarse material on the suction side of a pump.

(O) "Suction piping" means that portion of the circulation piping located between the pool structure and the inlet side of the pump and usually includes the following:

(i) Main outlet piping.

(ii) Skimmer piping.

(iii) Vacuum piping.

(iv) Surge tank piping.

(P) "Surface skimmer" means a device designed to continuously remove surface film and water and return it through the filter as part of the recirculation system, usually incorporating a self-adjusting weir, a collection tank, and a means to prevent air lock of the pump. It is sometimes referred to as a "recirculating overflow", a "mechanical", or an "automatic skimmer".

(Q) "Swimming pool" means any artificial basin of water constructed, modified, or improved for wading, swimming, or diving. The term does not include artificial lakes. The term includes the following:

(i) "Swimming pool, in-ground" means any pool whose sides rest in partial or full contact with the earth.

(ii) "Swimming pool, on-ground" means any pool whose sides rest fully above the surrounding earth.

(iii) "Swimming pool, residential" means any in-ground pool or on-ground pool capable of a water depth greater than forty-two (42) inches (one thousand sixty-seven (1,067) mm), and all pools installed inside a residence, regardless of water depth, whether or not served by electrical circuits of any nature, and which is intended for noncommercial use as a swimming pool by not more than two (2) owner families and their guests.

(17) S4202.17 Definitions "T"

(A) "Total discharge head" means the value in feet of water that a pump will raise water above its center line.

(B) "Total dynamic head" or "TDH" means the arithmetical difference between the total discharge head and total suction head (a vacuum reading is considered as a negative pressure). This value is used to develop the published performance curve.

(C) "Total dynamic suction lift" or "TDSL" means the arithmetical total of static suction lift, friction head loss, and velocity head loss working on the suction side of the pump.

(D) "Total suction head" means the value in feet of water that a pump will lift by suction.

(E) "Toxic" means having an adverse physiological effect on man.

(F) "Trap" means a fitting or device so designed and constructed as to provide, when properly vented, a liquid seal that will prevent the back passage of air without materially affecting the flow of sewage or wastewater through it.

(G) "Trimmer valve" means a flow adjusting device that is used to proportion flow over the skimming weir and flow through the main suction line from the main outlet or the vacuum cleaning line.

(H) "Turnover time" means the period of time required to circulate a volume of water equal to the pool capacity.

(18) S4202.18 Definitions "U"

(A) "Underwater light" means a fixture designed to illuminate a pool from beneath the water surface, further defined as:

(i) "dry niche light" means a light unit placed behind a watertight window in the pool wall; or

(ii) "wet niche light" means a watertight and water-cooled light unit placed in a submerged, wet niche in the pool wall and accessible only from the pool.

(B) "Upper distribution system" means those devices designed to distribute the water entering a permanent medium filter in a manner so as to prevent movement or migration of the filter medium. This system shall also properly collect water during filter backwashing unless other means are provided.

(19) S4202.19 Definitions "V"

(A) "Vacuum piping" means the piping from the suction side of a pump connected to a vacuum fitting located at the pool and below the water level to which underwater cleaning equipment may be attached.

(B) "Velocity" means a measurement of the motion of liquids usually expressed in feet per second.

(C) "Vertical" means a truly plumb line of surface running perpendicular to the plane of the horizon.

(20) S4202.20 Definitions "W"

(A) "Wading area" means the portions of a pool having water depths of two (2) feet and less.

(B) "Walls" means interior pool wall surfaces consisting of surfaces from the vertical to a forty-five (45) degree slope.

(C) "Waste piping" means piping that conveys wastewater.

(D) "Waterline" means one (1) of the following:

(i) The waterline for the skimmer system shall fall in the midpoint of the operating range of the skimmers.

(ii) The waterline for the overflow system shall be established by the height of the overflow rim or the mid-level of surge weirs, if present.

(E) "Width or length" means the actual water dimension taken from wall to wall at the waterline.

(F) "Winterizing" means the procedure for preparing pools from freezing weather. The term includes chemical treatment of the standing water, plus physical and chemical protection of the pool and its equipment against freezing.

(G) "Working pressure" means the maximum operating water pressure recommended by the manufacturer.

(Fire Prevention and Building Safety Commission; 675 IAC 14-4.3-271; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 4, 2011, 8:35 a.m.: 20110831-IR-675110254RFA)