Wisconsin Administrative Code
Department of Agriculture, Trade and Consumer Protection
ATCP 55-89 - Food, Lodging, and Recreation Safety
Chapter ATCP 75 - Retail Food Establishments
Appendix - Wisconsin Food Code
Chapter 5 - Water, Plumbing, and Waste
Part 5-2 - PLUMBING SYSTEM
Subpart 5-202 - Design, Construction, and Installation
Section 5-202.13 - Backflow Prevention, Air Gap

An air gap between the water supply inlet and the flood level rim of the PLUMBING FIXTURE, EQUIPMENT, or nonFOOD EQUIPMENT shall comply with the State Uniform Plumbing Code, chs. SPS 381 to 387, as enforced by the Wisconsin department of safety and professional services. P

Contact the Safety and Building Division at the department of safety and professional services, P.O. Box 2509, Madison, WI 53701, telephone 608-266-3151 and 711 (TTY) or https://dsps.wi.gov/pages/home.aspx.