675 IAC 20-2-17 Circulation systems

Sec. 17. (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 pool. (b) The circulation system shall be of adequate size to produce not less than the following turnover times: (1) Class A, Class B, and Class C diving pools: twelve (12) hours. (2) Class A, Class B, and Class C pools without wading areas: six (6) hours. (3) Class B and Class C pools with wading areas: two (2) hours. (4) Class B and Class C wading pools: one (1) hour. (5) Class B and Class C wave pools and zero (0) depth pools: two (2) hours. (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. Circulation systems and equipment within the scope of NSF/ANSI 50-2009 Equipment for Swimming Pools, Spas, Hot Tubs and other Recreational Water Facilities – Evaluation criteria for materials, components, products, equipment and systems for use at recreational water facilities, as published by NSF International, P.O. Box 130140, Ann Arbor, Michigan 48113-0140, shall: (1) conform to NSF/ANSI 50-2009 and bear the NSF endorsement seal, unless the manufacturer certifies the products are in compliance with NSF/ANSI 50-2009; or (2) be of a material suitable for water supply piping as specified in 675 IAC 16, the Indiana Plumbing Code. All exposed piping shall be color coded or provided with permanent labels or tags for easy identification. (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. Pool piping shall be sized to permit the rated flows for filtering and cleaning without exceeding the maximum head at which the pump will provide such 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 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) Pool 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 pool water from the equipment, together with exposed face piping, by removal of drain plugs and manipulating winter drain valves. (j) A pressure or vacuum gauge or other means of indicating system condition shall be provided in the circulation system in an accessible location. Class A, Class B, and Class C pools 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.