Forum Discussion
bartlettj
Jun 20, 2017Explorer
I just got done installing a Delta unit in my house. With some creativity you could mount one more or less on the surface in the shower if you built a sealed box to cover it. They even make them with PEX supply barbs.
Be aware that most US shower valves are pressure balancing (covering the case where someone flushes the toilet), not thermostatic. The problem in an RV is mainly that the temperature out of the water heater changes a lot as the water gets used up but the pressure out of the hot and cold taps remains relatively equal. You'll still be getting balanced pressure out of the shower valve for a non-thermostatic unit but you won't have any real anti-scald or automatic temperature control. I think you are better off installing a tempering valve that mixes hot and cool water together at the output of the water heater to hit 120 degrees maximum in the shower. That will self regulate until the water heater output temperature drops too low.
http://www.watts.com/pages/_products_details.asp?pid=6841
Be aware that most US shower valves are pressure balancing (covering the case where someone flushes the toilet), not thermostatic. The problem in an RV is mainly that the temperature out of the water heater changes a lot as the water gets used up but the pressure out of the hot and cold taps remains relatively equal. You'll still be getting balanced pressure out of the shower valve for a non-thermostatic unit but you won't have any real anti-scald or automatic temperature control. I think you are better off installing a tempering valve that mixes hot and cool water together at the output of the water heater to hit 120 degrees maximum in the shower. That will self regulate until the water heater output temperature drops too low.
http://www.watts.com/pages/_products_details.asp?pid=6841
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