Section 6-201.12 - Floors, Walls, and Ceilings, Utility Lines(A) Utility service lines and pipes may not be unnecessarily exposed.(B) Exposed utility service lines and pipes shall be installed so they do not obstruct or prevent cleaning of the floors, walls, or ceilings.(C) Exposed horizontal utility service lines and pipes may not be installed on the floor.Wis. Admin. Code Department of Health Services § 6-201.12