R392-302-16. Circulation Systems

  (1) A circulation system, consisting of pumps, piping, filters, water conditioning and disinfection equipment and other related equipment must be provided. The operator shall maintain the normal water line of the pool at the overflow rim of the gutter, if an overflow gutter is used, or at the midpoint of the skimmer opening if skimmers are used whenever the pool is open for bathing. An exemption to this requirement may be granted by the Department if the pool operator can demonstrate that the safety of the bathers is not compromised.

  (a) The circulation system shall meet the minimum turnover time listed in Table 1.

  (b) If a single pool incorporates more than one the pool types listed in Table 1, either:

  (i) the entire pool shall be designed with the shortest turnover time required in Table 1 of all the turnover times for the pool types incorporated into the pool or

  (ii) the pool shall be designed with pool-type zones where each zone is provided with the recirculation flow rate that meets the requirements of Table 1.

  (c) The Health Officer may require the pool operator to demonstrate that a pool is performing in accordance with the approved design.

  (d) The operator shall run circulation equipment continuously except for periods of routine or other necessary maintenance. Pumps with the ability to decrease flow when the pool has little or no use are allowed as long as the same number of turnovers are achieved in 24 hours that would be required using the turnover time listed in Table 1 and the water quality standards of R392-302-27 can be maintained. The circulation system must be designed to permit complete drainage of the system.

  (e) Piping must be of non-toxic material, resistant to corrosion and be able to withstand operating pressures.

  (f) Plumbing must be identified by a color code or labels.

  (2) The water velocity in discharge piping may not exceed 10 feet, 3.05 meters, per second, except for copper pipe where the velocity for piping may not exceed 8 feet, 2.44 meters, per second.

  (3) Suction velocity for all piping may not exceed 6 feet, 1.83 meters, per second.

  (4) The circulation system must include a strainer to prevent hair, lint, etc., from reaching the pump.

  (a) Strainers must be corrosion-resistant with openings not more than 1/8 inch, 3.18 millimeters, in size.

  (b) Strainers must provide a free flow capacity of at least four times the area of the pump suction line.

  (c) Strainers must be readily accessible for frequent cleaning.

  (d) Strainers must be maintained in a clean and sanitary condition.

  (e) Each pump strainer must be provided with necessary valves to facilitate cleaning of the system without excessive flooding.

  (5) A vacuum-cleaning system must be provided.

  (a) If this system is an integral part of the circulation system, connections must be located in the walls of the pool, at least 8 inches, 20.32 centimeters, below the water line. This requirement does not apply to vacuums operated from skimmers.

  (b) The number of connections provided must facilitate access to all areas of the pool through hoses less than 50 feet, 15.24 meters, in length.

  (6) A rate-of-flow indicator, reading in gallons per minute, must be properly installed and located according to manufacturer recommendations. The indicator must be located in a place and position where it can be easily read.

  (7) Pumps must be of adequate capacity to provide the required number of turnovers of pool water as specified in Subsection R392-302-16, Table 1. The pump or pumps must be capable of providing flow adequate for the backwashing of filters. Under normal conditions, the pump or pumps must supply the circulation rate of flow at a dynamic head which includes, in addition to the usual equipment, fitting and friction losses, an additional loss of 15 feet, 4.57 meters, for rapid sand filters, vacuum precoat media filters or vacuum cartridge filters and 40 feet, 12.19 meters, for pressure precoat media filters, high rate sand filters or cartridge filters, as well as pool inlet orifice loss of 15 feet, 4.57 meters.

  (8) A pool equipped with heaters must meet the requirements for boilers and pressure vessels as required by the State of Utah Boiler and Pressure Vessel Rules, R616-2, and must have a fixed thermometer mounted in the pool circulation line downstream from the heater outlet. The heater must be provided with a heatsink as required by manufacturer's instructions.

  (9) The area housing the circulation equipment must be designed with adequate working space so that all equipment may be easily disassembled, removed, and replaced for proper maintenance.

  (10) All circulation lines to and from the pool must be regulated with valves in order to control the circulation flow.

  (a) All valves must be located where they will be readily and easily accessible for maintenance and removal.

  (b) Multiport valves must comply with NSF/ANSI 50-2015.

  (11) Written operational instructions must be immediately available at the facility at all times.

TABLE 1

Circulation

Pool Type Min. Number Min. Number Min. Turnover

             of Wall of Skimmers Time

             Inlets per 3,500

                            square ft.

                            or less

1. Swim 1 per 1 per 8 hrs.

             10 ft., 500 sq. ft.,

             3.05 m. 46.45 sq. m.

2. Swim, 1 per 1 per 6 hrs.

   high 10 ft., 500 sq. ft.,

   bather 3.05 m. 46.45 sq. m.

   load

3. Wading 1 per 1 per 1 hr.

   pool 20 ft., 500 sq. ft.

             6.10 m. 46.45 sq. m.

             min. of 2

             equally

             spaced

4. Spa 1 per 1 per 0.5 hr.

             20 ft., 100 sq. ft.,

             6.10 m. 9.29 sq. m.

5. Wave 1 per 1 per 6 hrs.

             10 ft., 500 sq. ft.,

             3.05 m. 46.45 sq. m.

6. Slide 1 per 1 per 1 hr.

             10 ft., 500 sq. ft.,

             3.05 m. 46.45 sq. m.

7. Vehicle 1 per 1 per 1 hr.

   slide 10 ft., 500 sq. ft.,

             3.05 m. 46.45 sq. m.

8. Special 1 per 1 per 1 hr.

   Purpose 10 ft., 500 sq. ft.,

   Pool 3.05 m. 46.45 sq. m.

  (12) Each air induction system installed must comply with the following requirements:

  (a) An air induction system must be designed and maintained to prevent any possibility of water back-up that could cause electrical shock hazards.

  (b) An air intake may not introduce contaminants such as noxious chemicals, fumes, deck water, dirt, etc. into the pool.

  (13) The circulation lines of jet systems and other forms of water agitation must be independent and separate from the circulation-filtration and heating systems.