1.   Another device, a thermostatic mixing valve, contains a diaphragm that expands and stops the flow when water reaches a set temperature.

2.   A thermostatic mixing valve can be set at a specific temperature, which it will maintain.

3.   Some people have had good luck installing a mixing valve to bring a bit of hot water into the tank.

4.   The law requires the installation of either a pressure-balanced valve or a thermostatic mixing valve.

5.   To compensate for the difference in temperature, he said, water going from the boiler to the hydronic tubing is cooled by passing it through a mixing valve.

6.   Ultimately, I chose a shower body with a thermostatic mixing valve made by Dornbracht, even though it cost much more than I had planned to spend.