Section 675IAC20-5-14. Circulation systems

   (a) A circulation system consisting of:

(1) pumps;

(2) piping;

(3) overflows;

(4) skimmers;

(5) filters; and

(6) other necessary equipment;

shall be provided for complete and continuous circulation of water through all parts of the water attraction.

  (b) The circulation system shall be of adequate size to produce a specified maximum turnover time for the entire pool capacity. The maximum turnover times for water attractions shall be as listed in Table 14-1 as follows:

Table 14-1
MAXIMUM TURNOVER TIME BY WATER ATTRACTION TYPE
Water Attraction Type	Turnover Time (in hours)
Interactive play attraction	0.5
Leisure river	2
Plunge	2
Runout slide	2
Vortex	2
Wave	2
Zero depth	2

  (c) Circulation components that may require replacement or servicing shall be:

(1) accessible and available for inspection, repair, or replacement; and

(2) installed according to manufacturer's instructions.

  (d) Materials and equipment used in the circulation system shall be of an approved type.

  (e) The water velocity in the pool piping shall not exceed ten (10) feet per second for discharge piping and six (6) feet per second for suction piping, unless summary calculations are provided to show that the greater flow is possible with the pump and piping provided. Water attraction piping shall be sized to permit the rated flows for filtering and cleaning without exceeding the maximum head at which the pump will provide the flows or exceeding the velocities stated. An exception is the water velocity in copper pipe shall not exceed eight (8) feet per second.

  (f) The circulation piping and fittings shall be nontoxic and capable of withstanding operating temperatures, pressures, and conditions.

  (g) The suction side of the circulation system shall be tied and split hydraulically equally between the two (2) or more main outlets. Both branches shall have the same size pipe as the main outlet.

  (h) Water attraction piping shall:

(1) have a uniform slope in one (1) direction equipped with valves for adequate drainage; and

(2) be supported at sufficient intervals to prevent entrapment of air, water, or dirt.

Provision shall be made for expansion or contraction of pipes.

  (i) Equipment shall be designed and fabricated to drain the water attraction water from the equipment, together with exposed face piping, by removal of drain plugs and manipulating winter drain valves.

  (j) A pressure and a vacuum gauge or other means of indicating system condition shall be provided in the circulation system in an accessible location. Water attractions shall be provided with an indicator measuring the rate of flow through the filter system with an appropriate range readable in gallons per minute and accurate within ten percent (10%) actual flow.

  (k) Time clocks shall not be used to regulate the operation of circulation systems.

  (l) Operation and maintenance instructions, including a laminated pump curve or curves and conversion chart (psi to tdh) shall be provided for circulation system components. (Fire Prevention and Building Safety Commission; 675 IAC 20-5-14; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 7, 2013, 8:51 a.m.: 20130904-IR-675130181RFA)