Section R. 325.17403 - Button and lint trapsRule 403.
(1) Button or lint traps on dry cleaning machines shall be designed so as to prevent loss of solvent or solvent vapor.(2) A solvent bypass arrangement shall be provided for the button or lint trap if overflow might occur due to partial or total blocking of the trap.(3) A button or lint trap cover shall be kept closed during normal operations of the dry cleaning machine.Mich. Admin. Code R. 325.17403