Section 675IAC20-5-18. Outlets

   (a) Water attraction inlets and outlets for circulated water shall be located to:

(1) produce uniform circulation of water; and

(2) facilitate the maintenance of a uniform disinfectant residual throughout the entire pool.

  (b) Outlet drain covers and grates shall be installed in such a way that they cannot be removed without the use of tools.

  (c) All water attractions shall be provided with a main outlet in the lowest point of the floor. All main outlets shall be dual main outlets with a separation distance of three (3) feet or more on center of the suction pipe in any direction. The spacing of the main outlets for water attraction pump suction shall be evenly distributed over the entire length and not more than fifteen (15) feet from each side wall.

  (d) The main outlet sumps shall be covered with suitable protective covers or grates. The total velocity through grate openings shall not exceed one and one-half (1.5) feet per second. The grate opening shall not exceed one-half (1/2) inch. The main outlets shall conform to ASTM F 1346-91 (2003). Safety cover installations shall be such that they can only be removed with the use of tools.

  (e) A maximum of one and one-half (1.5) feet/second (four-tenths (0.4) m/sec) for flow through for suction grates.

  (f) Except for reverse flow systems, twenty percent (20%) to twenty-five percent (25%) of the circulated water shall be drawn through the main outlet or outlets.

  (g) Main outlet piping shall be sized for removal of the water through it at a rate of at least one hundred percent (100%) of the design circulation flow rate at velocities specified in section 17(e) of this rule. It shall function as part of the circulation system. The piping system shall be valved to permit adjustment of flow through it.

  (h) The suction outlets shall be designed to protect against a suction entrapment, evisceration, and hair entanglement hazard.

  (i) Suction outlets, other than skimmers, that measure less than eighteen (18) inches by eighteen (18) inches (three hundred twenty-four (324) sq. in.) or do not have at least one (1) dimension that is at least twenty-four (24) inches shall be provided with covers tested by a nationally recognized testing laboratory to comply with ASME/ANSI A112.19.8 (2007).

  (j) A minimum of two (2) hydraulically balanced, covered, suction outlets, per pump suction line shall be provided.

  (k) A single outlet shall be allowed provided that the outlet has at least one (1) dimension that is at least thirty-six (36) inches.

  (l) When dual suction outlets are provided, no piping or valve arrangement may be allowed that will isolate one (1) suction fitting as the sole source of fluid to the pump. The single pipe to a pump suction inlet may be valved to shut off the flow to the pump.

  (m) For wave pools, barriers shall be provided on caissons that prevent the passage of a four (4) inch ball.

  (n) The installation and use of vacuum fittings for new construction is prohibited. (Fire Prevention and Building Safety Commission; 675 IAC 20-5-18; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 7, 2013, 8:51 a.m.: 20130904-IR-675130181RFA)