The water-distributing system and each water outlet must be protected against backflow. The water outlet must:

1. (1) Have the outlet end from which the water flows spaced a distance above the flood-level rim of the receptacle into which the water flows, which is sufficient to provide a minimum air gap as required in table 603.3.1 of the Uniform Plumbing Code, 2024 edition; or

2. (2) If it is not possible to provide a minimum air gap, be equipped with an accessible backflow preventer installed on the discharge side of the manual control valve, which complies with section 603.2 of the Uniform Plumbing Code, 2024 edition.

   Reference: Uniform Plumbing Code, 2015 edition, International Association of Plumbing and Mechanical Officials. Copies may be obtained from the International Association of Plumbing and Mechanical Officials, 5001 East Philadelphia Street, Ontario, CA 91761. Copies may be viewed free of charge at https://epubs.iapmo.org/2024/UPC/.

Source: SL 1975, ch 16, § 1; 12 SDR 91, effective December 2, 1985; 12 SDR 151, 12 SDR 155, effective July 1, 1986; 23 SDR 83, effective November 28, 1996; 29 SDR 52, effective October 20, 2002; 30 SDR 99, effective December 22, 2003; 38 SDR 40, effective September 20, 2011; 43 SDR 31, effective September 12, 2016 ; 52 SDR 42, effective October 28, 2025 .

General Authority: SDCL 36-25-15 .

Law Implemented: SDCL 36-25-15 .

Prior versions effective: 2016-09-12, 2011-09-20.