You know, I started looking into this, and now I don't understand what
a "thermostatic" shower valve does. I thought it would adjust the
relative flow of the incoming hot and cold water supplies to provide
the desired temperature, regardless of the incoming temperatures. But
I have read a number of the manuals which state that if you adjust
your water heater temperature, you have to recalibrate the
"thermostatic" valve. In which case it doesn't seem very thermostatic
Are there any thermostatic shower mixing valves that will maintain the
set temperature given fluctuating hot water supply temperatures?
OK, I contacted Delta today for some clarification. The issue is that
Delta's thermostatic valves (17T series and 18T series) have a warning
in the manual that if you adjust the temperature of the hot water
supply, you may need to recalibrate the thermostatic cartridges. The
answer Delta gave me was that the valves are thermostatic with respect
to small fluctatuations in supply temperature (a few degrees) but not
in response to large fluctatuations in supply temperature (tens of
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.