Section 675IAC20-3-6.1. Outlets

  1. (a) Spa inlets and outlets shall be arranged to:

(1) produce a uniform circulation of water; and

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

  (b) Water velocity in the spa piping shall not exceed ten (10) feet per second with the following exceptions:

(1) Suction velocity shall not exceed six (6) feet per second.

(2) Water velocity in existing asbestos cement pipe shall not exceed six (6) feet per second.

(3) Water velocity in copper pipe shall not exceed eight (8) feet per second.

  (c) Total velocity through grate openings shall not exceed one and one-half (1.5) feet per second.

  (d) All outlets below the waterline shall be covered with either a protective grate with individual openings of three-eighths (3/8) of an inch or less.

  (e) All spas shall have a surface skimming (overflow) system and dual drain outlets at the lowest point on the spa floor. The dual outlets shall be spaced at least three (3) feet apart. When skimmers are the sole overflow system, not less than one (1) skimmer shall be provided for each one hundred (100) square feet, or portion thereof, of water surface.

  (f) Main outlets shall conform to the requirements of ASME A112.19.8 (2007). (Fire Prevention and Building Safety Commission; 675 IAC 20-3-6.1; filed Mar 25, 2011, 10:19 a.m.: 20110420-IR-675090789FRA; readopted filed Aug 7, 2013, 8:51 a.m.: 20130904-IR-675130181RFA)