The Whirlpool W11573757 Dishwasher Cap is a replacement component for your Whirlpool dishwasher. It's a little but important component that serves as a cover or plug for a specific opening in the dishwasher. The cap's specific purpose is determined by where it is located in the dishwasher. In some models, it may cover the drain line opening to avoid leaks and clogs. In other cases, it could be a cap for the wash tub, allowing access for maintenance or repairs. A properly functioning cap, regardless of its location, is critical for a dishwasher to run well. A cracked or missing cap can cause leaks, water damage, and even malfunctioning of the dishwasher.