Automatic faucets do not have hot & cold handles to adjust the water temperature coming out of the spout, and normally installed to a single water supply only. This valve is used for a automatic faucet to mix hot and cold water, and to control water temperature. Easy control of hot and cold water mixing ratio to adjust water temperature. One end is cold water inlet, one end is hot water inlet, and the middle mixed water outlet, easy to install and use. G1/2 standard thread fits for many household or commercial pipes. Built-in check valves are effective in avoiding cold and hot water backflow.