SPS 390.14(10)(b)2.
2. High rate sand filters shall be specified so that the maximum flow rate does not exceed 15 gallons per minute per square foot or bed surface area.
SPS 390.14(10)(c)1.1. Pressure-type filters shall be provided with a means to permit the release of internal pressure.
SPS 390.14(10)(c)2.
2. Filters incorporating an automatic air vent as the principal means of air release shall have a lid that provides a slow and safe release of pressure as a part of the design and have manual air release in addition to the automatic release.
SPS 390.14(10)(c)3.
3. Separation tanks used in conjunction with a filter tank shall comply with
subd. 2.
SPS 390.14(10)(c)4.
4. The following statement shall be placed within the area of the air release so as to be clearly visible: “WARNING. DO NOT START UP THE SYSTEM AFTER MAINTENANCE WITHOUT FIRST OPENING THE AIR RELEASE AND PROPERLY ASSEMBLING THE FILTER AND SEPARATION TANK."
SPS 390.14(11)(a)(a) Circulation piping shall be listed as meeting one of the following methods:
SPS 390.14(11)(b)
(b) All circulation piping shall be listed to withhold a pressure 50 percent greater than the maximum design pressure.
SPS 390.14(12)(a)(a) All circulation pumps shall be capable of providing the design flow rates at one of the following minimum total dynamic heads:
SPS 390.14(12)(a)4.
4. A maximum total dynamic head value recommended by the filter manufacturer that allows the filter to function under all operating conditions.
SPS 390.14(12)(b)
(b) Pumps located below the waterline of a basin shall have isolation valves installed on suction and discharge lines.
SPS 390.14(12)(c)
(c) Pumps located above the waterline of the pool shall be self-priming or the system shall be designed to provide a means for priming.
SPS 390.14(12)(d)
(d) Intake strainers shall be provided upstream of all circulations pumps on pressure filter systems.
SPS 390.14(13)(a)(a) Inlets and outlets shall be provided and arranged to produce a uniform circulation of water and maintain the distribution of sanitizer residual throughout the pool.
SPS 390.14(13)(b)1.1. Return inlets shall be designed and installed so as to not constitute a hazard to the patron.
SPS 390.14 Note
Note: An example of an inlet installation constituting a hazard to a patron is an inlet installed on a racing lane cross.
SPS 390.14(13)(b)3.
3. Except as provided in
subd. 4., the velocity of flow through any inlet orifice shall be in the range of 5 to 20 feet per second
SPS 390.14(13)(b)4.
4. For pools equipped with skimmers the velocity of flow through any inlet orifice shall be in the range of 10 to 20 feet per second.
SPS 390.14(13)(b)5.
5. Except for leisure rivers, the minimum number of return inlets shall be based on at least one additional inlet per 300 square feet of pool surface area or fraction thereof.
SPS 390.14(13)(b)6.
6. There shall be at least one wall return inlet for each 10 feet of stairway width, recessed bench length or swimout length or width or fraction thereof.
SPS 390.14(13)(b)8.
8. Bottom return inlets shall be considered to have an area of influence of a radius of 10 feet.
SPS 390.14 Note
Note: See ch.
SPS 390 Appendix for further explanatory material.
SPS 390.14(13)(b)10.
10. Except for leisure rivers, there shall be a wall return inlet within 5 feet of each corner of a basin wall.
SPS 390.14(13)(c)1.1. Suction system flow through main drains shall be designed to accommodate 100 percent of the circulation flow rate in accordance with all of the following:
SPS 390.14(13)(c)1.a.
a. All basins shall be provided with a suction outlet in the lowest point of the basin in the floor or the wall.
SPS 390.14 Note
Note: For main drains installed in diving wells, see Figure 390.11-1 and Table 390.11-1.
SPS 390.14(13)(c)1.b.
b. Where 2 or more drains connect within the circulation system, all drains minus any one in the set shall be designed to collectively convey 100 percent of the circulation flow rate.
SPS 390.14(13)(c)1.c.
c. The distance between the bottom of the suction outlet grate and the opening of the suction pipe shall equal or exceed at least 1.5 times the inside diameter of the suction pipe.
SPS 390.14(13)(c)2.
2. Suction outlet grates shall comply with at least one of the following requirements:
SPS 390.14(13)(c)2.a.
a. A single grate having at least one dimension of length, width, diagonal or diameter that is at least 36 inches.
SPS 390.14(13)(c)2.b.
b. Two or more grates of any size separated from other suction outlets by at least 3 feet.
SPS 390.14(13)(c)3.
3. Suction systems shall be designed so that the maximum flow rates are not exceeded under operating conditions.
SPS 390.14(13)(c)4.
4. Suction grates and covers shall be listed as conforming to ASME/ANSI A112.19.8.
SPS 390.14(13)(c)5.
5. The maximum opening of any suction grate shall prevent the passage of a
½-inch sphere.
SPS 390.14(13)(c)7.
7. Vacuum fittings are not permitted within public swimming pools or water attractions.
SPS 390.14(13)(d)1.1. Surface skimming systems shall be included in the design of and installed to serve all basins.
SPS 390.14(13)(d)2.
2. Surface skimming systems shall be designed and constructed to skim the basin surface when the water level is maintained within the operational parameters of the system's rim or weir device.
SPS 390.14(13)(d)4.
4. Skimmer covers located on a walking surface shall be designed and installed to comply with all of the following requirements:
SPS 390.14(13)(d)5.
5. Equalizer lines shall have an anti-entrapment cover or other entrapment protection in accordance with ASME/ANSI A112.19 when suction fittings are located in the wall of a basin.
SPS 390.14(13)(d)6.
6. Where automatic skimming devices are used as the sole overflow system, at least one surface skimming device shall be provided for each 500 square feet or fraction thereof of water surface area.
SPS 390.14(13)(d)7.
7. Circulation systems shall be designed to carry 100 percent of the rated circulation volume through the skimmers.
SPS 390.14(13)(d)8.
8. The flow rate through automatic skimmers shall be no less than 3 gallons per minute per inch of skimmer weir width.
SPS 390.14 Note
Note: The maximum flow rate through skimmers is determined by the ANSI/NSF 50 rating.
SPS 390.14(13)(d)9.
9. Acceptable options for surface skimming systems shall be in accordance with Table 390.14-3.
Table 390.14-3
SPS 390.14(13)(d)10.
10. When a gutter skimming system is used, the system shall be connected to a circulation system with an adequate surge capacity to permit all phases of operation.
SPS 390.14(13)(d)11.a.a. Except as provided in
subd. 11. b., a zero-depth trench shall extend continuously from within 3 feet of one wall of the basin to within 3 feet of the opposite wall of the basin.
SPS 390.14(13)(d)11.b.
b. Where the entire perimeter of the basin consists of a zero-depth entry, 50 percent shall be evenly-distributed zero-depth trench.
SPS 390.14 History
History: CR 08-056: cr.
Register February 2009 No. 638, eff. 3-1-09; correction in (10) (a) made under s.
13.92 (4) (b) 7., Stats.,
Register February 2009 No. 638; correction in (1), (11) (a) 2., (13) (d) 9. made under s.
13.92 (4) (b) 7., Stats.,
Register December 2011 No. 672;
correction in (10) (a) made under s. 13.92 (4) (b) 7., Stats., Register February 2017 No. 734.
SPS 390.16(1)
(1)
Electrical. Electrical components shall comply with the requirements of
ch. SPS 316.
SPS 390.16(2)(b)
(b) A thermometer accurate to within plus or minus 2
°F of the operating range shall be installed in the circulation piping.
SPS 390.16(2)(d)
(d) The use of a toxic solution, such as, but not limited to, heat transfer fluid in a single-wall heat exchanger, is prohibited.
SPS 390.16(2)(e)
(e) Water heaters and hot water storage tanks shall be equipped with temperature and pressure relief valves in accordance with
ch. SPS 384.
SPS 390.16(3)(a)(a) Artificial lighting shall be provided so that all areas of the pool, including the bottom, shall be visible when the pool or water attraction is used during periods of low illumination.
SPS 390.16(3)(b)
(b) For outdoor facilities, overhead lighting shall provide a minimum of 3 footcandles of illumination at the water surface and on the deck.
SPS 390.16(3)(c)
(c) For indoor facilities, overhead lighting shall provide a minimum of 10 footcandles at the water surface and on the deck.
SPS 390.16(3)(d)1.1. Except as permitted in
subd. 2., underwater lighting shall provide a minimum of
½-watt incandescent light per square foot of water surface area or equivalent.
