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In our last house, we had Thermostatic Shower Valves installed when the bathrooms were being remodeled. Now in our new house, I would like to install one on our main shower but I don't want to tear into the walls. Is there any way to install a valve that would control the temp at the shower head.

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  • Is this just a shower or is it a tub/shower with a diverter, and if the latter, is the diverter in wall or it is in the spigot? is this a single handle mixing valve or a two handle? Dec 15 '17 at 23:46
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Thermostatic mixing valves control the temperature by adjusting the amount of hot and cold water. By the time you get to the shower head, you only have one temperature of water to work with, and the only adjustment you can really make is on or off. So, no, there's no such product to do what you want.

While I was shopping this weekend, I did see a shower head at the store that changed its LED light colors depending on the water temperature. With something like this there would be a visible indication of the water temp, but it's not going to prevent scalding, or adjust the temperature.

Also, keep in mind that you can often open up the wall behind the shower to access the plumbing while keeping all the tilework in the shower untouched. That might be an option for you. If you're lucky and the back of the wall is in a closet, you can install an access panel and avoid drywall work altogether

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    Or cover up the hole with cabinetry, which is how the Victorians approached the entire issue. We have a cabinet in our house where you open it up and voila, you are looking at the backside of the mixing valve, overflow and drain/stopper mechanism. They are easier to service/ change than even a kitchen sink valve. Dec 15 '17 at 19:57
  • Unfortunately, the wall behind is an outside wall and it is on the second floor.
    – Bob Austin
    Dec 15 '17 at 20:49

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