Minn. R. 4626.1115
CROSS-CONNECTIONS PROHIBITED. 5-205.12
A. A person shall 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. P1 B. The piping of a nondrinking water system must be durably identified so that it is readily distinguishable from piping that carries drinking water. P2