The Whirlpool WP300096 Dishwasher Air Gap Kit is an essential component for keeping contaminated water from backing up into your dishwasher. It does this by physically separating the drain pipe from the dishwasher from the sink drain. Usually, the air gap kit consists of a high point in the drain line that is hidden by a countertop decorative cap. Dishwasher waste acts as a barrier to keep soiled sink water from recirculating back into the appliance. This is especially critical when using a garbage disposal, since it can introduce food particles and bacteria into the drain system. The air gap kit protects the dishwasher from infection and aids in maintaining WP300096 clean dishwasher installations by blocking leakage.