Our 3 litre Overflow Kit is a virtual extension of the Drip Tray. The Drip Tray of most AA Water Coolers have the facility to be connected to a drain. This connection is being used to connect to a 3 litre Container which will be situated inside the Water Cooler. The Container has an audible alarm which sounds when the container is full. It can be drained – without moving the container – through a tap on the front.