14.20.110 Recirculation.

(1)    Recirculation Equipment. Swimming pools shall be provided with complete circulation equipment and facilities, including pumping equipment, hair and lint catcher, filters, and balancing tanks, when required; together with all necessary valves, pipe connections to the inlets and outlets of the pool, and provisions for cleaning the filters. The entire system and its component parts shall be so designed that the entire volume of the pool can be recirculated in eight (8) hours. Not less than sixty percent (60%) of the recirculated water shall be returned through the overflow devices or channels.

(2)    Filtration Equipment. The maximum permissible filter rates shall be not greater than three (3) g.p.m. per square foot of filter area for pressure or gravity filters using sand or equal media; two (2) g.p.m. per square foot of filter area for diatomacious earth filters. Filters varying in principle of design or operation from the types and rates set forth in this section may be approved by Clark County public health provided appropriate tests and investigations indicate that such filters produce filter cycles, performance, operation and service equivalent to the filter types and rates heretofore set forth.

(3)    Disinfection Equipment. Equipment shall be provided for the adequate disinfection of all the pool water. When chlorinators or hypo-chlorinators are used they shall be dependable in operation and equipped with a controlling device capable of being finely adjusted to the required rates, and shall have the capacity sufficient to feed at the rate of at least one pound of chlorine per twenty-four (24) hours per ten thousand (10,000) gallons of pool capacity. When gas containers are used they shall be housed in a separate room or rooms with the access doors opening to the outside of the building. All gas chlorination equipment, including gas containers, shall be housed above ground level and be adequately ventilated.

(4)    Coagulant and Alkalinity Equipment. Suitable equipment for the feeding of a coagulant and alkalinity-producing chemical at such points that their use will be most effective shall be provided.

(5)    All swimming pools shall be equipped with facilities for adding make-up water.

(6)    Cross-Connections. No piping arrangement shall exist which under any forseeable condition will permit sewage or waste water to enter the recirculation system or the pool, or water from the recirculation system or the pool to enter the make-up water supply.

(7)    Access to Equipment. Filters and other equipment shall be easily accessible to the operator.

(8)    Testing Equipment. Suitable testing equipment in good repair, for determination of hydrogen ion concentration (pH), cyanuric acid level is used, and disinfectant residual shall be provided at the pool, together with a fresh supply of the necessary reagents.

(9)    Rate of Flow Indicators. A single flow indicator shall be installed to measure in gallons per minute the total recirculation flow.

(10)    Loss of Head Gauges. Suitable loss of head gauges shall be provided for measurement of lost head through filters.

(11)    Provision shall be made for means of discharging filter back-wash to waste; and where diatomacious filters are used, provision shall be made for recirculating first-filtered water to filter or discharging to waste.

(12)    Bather Load Capacity. The maximum number of bathers permitted within the pools at any one time shall not exceed a number determined by the following formula:

Maximum Bathing Load	=	A – S	+	S
		27		10

Where

A = Total area of water surface in square feet.

S = Area of pool less than four (4) feet, six (6) inches deep in square feet.

(13)    Flow-Through Pools. Exceptions to recirculation requirements can be made for flow-through pools in cases where the supply of water is sufficient to provide the same turnover period that is specified for recirculation pools; and provided, that the water supply meets the quality requirements as outlined in Section 14.20.070 and is subjected to a method of disinfection as outlined in Section 14.20.070; and provided that the introduction of fresh treated water into the pool is accomplished by the same type of inlet design required for recirculation pools, (Res. No. 76-04-7, 1976; amended by Sec. 1 of Ord. 2006-09-13)