What is a thermostatic valve, what does it do?
I remodeled my bath a year and a half ago and installed a thermostatic rough-in valve (newport brass model 1-534) in the shower. I thought I knew what it was supposed to do, i.e., keep the shower water temp constant at the chosen temperature. My husband (installed after the plumbing went in)says it doesn't work, and today it didn't even serve as an anti-scald valve. (Guess who was in the shower when I flushed the toilet?)
Perhaps its broken, or perhaps I have it all wrong. What IS a thermostatic valve? What is it supposed to do? How does it do that?
Thanks so much!