WAC 480-66-410. Water closets

(1) Every flush toilet must have a rim flush bowl or be so constructed as to prevent the accumulation of fecal matter on the bowl. The bowl must be constructed of a smooth finished material impervious to moisture. (2) Every bowl must be installed in a manner which allows surroundings and floor space to be easily cleaned. (3) No pan, plunger or wash-out water closets are permitted except that pan or double-pan types are permitted for movable facilities. (4) Every flush toilet must have a separate hinged seat made of a smooth finished material, other than metal, impervious to moisture.