mixing hot and cold water

mikegerard said:

I have an infrared EZ Faucet adapter hooked up on one of my faucets. You open the faucet and it turns the water on and off automatically when you pass your hands under it. Here's a link.

http://www.dynamic-living.com/hands-free-faucet.htm

It seemed to work fine in the summer but now it's winter and the cold water is COLD. I recently noticed that if I have this faucet set so that there is warm water coming out all the hot water lines in the house are only warm. If I move this faucet to all cold or all hot then the other waters lines in the house get hot.

Any ideas on what is happening here?

Either get a "good" automatic faucet or install check valves on the line to the faucet to prevent backflow into the pipes.

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