What is a thermostatic valve?

4mom23girlsOctober 5, 2011

Sorry, it's probably a no-brainer answer, but what is this thermostatic valve? A lot of people here on GW are bringing this term up and I don't understand what it is and why people want it.

We are building a house and trying to figure out the ideal set-up for our master shower. Right now, it's configured for one fixed and one hand held fixture. Should it be a slide bar or not? We live in So. Calif and the house will have a tankless water heater. We are also using PEX piping. What is this thermostatic and should we really get this?

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lazypup

In its simplest form a thermostatic valve is literally a valve with a built in thermostat function. Both a hot & cold water line are attached to the valve and the valve will continually mix the two water sources to maintain a preset temperatute on the output.

In addition to maintaining a constant output temperture a shower thermostatic valve is preset to insure the output cannot exceed the code maximum of 120degF.

Thermostatic valves are now a code requirement.

    Bookmark   October 6, 2011 at 12:16AM
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pbx2_gw

We are also building & are set on a vintage look exposed shower system that does not have a Thermostatic valves build in the master shower. To piggy back on the OP's question:

Can exposed shower system be complemented by some aftermarket universal valve?

Before Thermostatic valves to mix the water to specific water temp, what did we humans do?

    Bookmark   August 6, 2012 at 9:29AM
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randy427

"Before Thermostatic valves to mix the water to specific water temp, what did we humans do? "
We set the water heater thermostat low enough that we didn't scald the kids.

    Bookmark   August 6, 2012 at 4:24PM
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brickeyee

"We set the water heater thermostat low enough that we didn't scald the kids. "

We actually watched the kids to make sure they did not get scalded.

Fancy that.

Actual parenting.

    Bookmark   August 6, 2012 at 4:59PM
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