The Fisher & Paykel 820718 Refrigerator Ice and Water Valve 16W regulates the amount of water flowing to the ice maker and the water dispenser system. It works on an electrically activated valve, which opens upon request by the control system, and water flows out of the supply line through to the ice-making. The refrigerator is installed in the back interior of the refrigerator, into which the valve is directly attached to the incoming water supply and internal tubing. It maintains the regularity of water delivery and enables the appearance of ice in time.