Section 5-205.12 - Prohibiting a Cross Connection(A) A PERSON may not create a cross connection by connecting a pipe or conduit between the DRINKING WATER system and a nonDRINKING WATER system or a water system of unknown quality. P(B) The piping of a nonDRINKING WATER system shall be durably identified so that it is readily distinguishable from piping that carries DRINKING WATER . PfWis. Admin. Code Department of Health Services § 5-205.12