The Whirlpool WP22004112 coin drop mechanism is intended exclusively for commercial washing machines. Coins, usually quarters, can be inserted into the correct slot to activate the washer. The coin chute has marks indicating the approved coin denomination and a separate slot for returning unaccepted coins. When the appropriate amount of money is placed, the coin drop activates an internal mechanism that unlocks the washer's control panel and enables a wash cycle. Laundromats, apartment complexes, and other places where several people share laundry facilities WP22004112 are typical places to find this method. A coin drop mechanism has the advantages of simplicity and security.