“Mixing valve controls hot water temperature at the faucet. Prevents scalding. You forget how much you depend on it until you go to someone else's house and turn on their hot water, and are reminded just how hot it can get. Especially if you have kids or older people in the house, who can accidentally bump the shower control knob and change the temperature setting, this device is worth it. One tip; because it mixes hot and cold water to get the right temperature, minerals dissolved in the very hot water can crystalize when the water is cooled down, and deposit minerals in the valve (if you've got hard water). My original unit gradually started delivering cooler and cooler water, as the mineral deposits built up inside. I replaced the unit (after 8 years), but when I took out the old one I realized that I probably could have cleaned out the mineral deposits and had it working right again. But they're not that expensive, so I just installed the new one.”
“I use this mixing valve to temper the cold water line feeding an upstairs bathroom. Hot water for the shower, etc is provided by an on-demand electric water heater located in the bathroom. The problem was the cold water came directly from a well and was really, really cold, like 45-50 Fahrenheit, too cold for the on-demand water heater to handle. Now the "cold" water is room temperature (70 F) and the system works beautifully. Thank you!”
