Section R. 436.1427 - Washing of drinking containers and draft beer equipmentRule 27.
(1) An on-premises licensee shall wash, rinse, and sanitize all glasses, mugs, steins, and other reusable drinking containers which are used to serve alcoholic liquor to customers.(2) An on-premises licensee shall thoroughly cleanse, as often as may be necessary, all beer coils, lines, barrels, tubes, and any other draft beer equipment to keep them in a clean and sanitary condition. An on-premises licensee shall not draw beer through tubes with rubber inner linings.(3) An on-premises licensee shall pipe all air intakes on pressure pumps used in drawing draft beer in such a manner that only clean air will be used.Mich. Admin. Code R. 436.1427