A mixing valve takes water from 2 different sources and combines to send out a mixture of the two. You can set the mixing valve to a desired temperature between 80 and 120 degrees F for the outgoing water. The valve will then take the incoming water and combine them to create the desired temperature. For example, if you have 180 degree F water and 60 degree F water coming in, and you have set the valve for 80 degrees F, it will use more of the colder water and less of the hot to create the proper outgoing temperature. The percentages of each water source used will vary depending on the temperature of each and the set outgoing temperature.
Mixing valves and thermostatic mixing valves can be found at www.supplyhouse.com
