To find the model number for a Kohler product, consult the downloadable guide on the Kohler website that assists customers in identifying model numbers. Kohler makes numerous products, and each type of product has a model number located in a place unique to that product type.
Model numbers for Kohler toilets are located on the inside, side or back wall of the toilet tank. For faucets the model number is called a "PN" number, and it is printed on a white tag attached to the cold water supply line under the sink. Model numbers for showers and doors are located in the top track of the door or behind the door's hinge.