Section R. 400.11311 - Water supplyRule 311.
(1) Each sink, lavatory, and shower shall be supplied with safe and potable water which is sufficient in quantity and pressure to meet conditions of peak demand. Hot water in outlets accessible to campers shall not exceed 120 degrees Fahrenheit.(2) Water shall be supplied from a public water system, if available, or, if not available, from an on-site approved water source which complies with Act No. 399 of the Public Acts of 1976, being S325.1001 et seq. of the Michigan Compiled Laws. There shall be no cross-connection between the water supply system and a secondary water supply or piping system which may contain sanitary waste or any other contaminant. Installation of new wells or repairs on existing wells shall be done by water well drilling contractors registered under sections 12701 to 12721 of Act No. 368 of the Public Acts of 1978, as amended, being SS333.12701to 333.12721 of the Michigan Compiled Laws.Mich. Admin. Code R. 400.11311