I recently purchased an apartment building that will need several shower mixing valves replaced. I've always used Symmons Temptrol and I never had one fail. At $130, they are a little pricey but not outrageous. Before I invest in several more, what specific brand/model do you plumbers out there prefer?
I'm not a plumber but my friend is a licensed commercial plumber and has done work for me on several residential remodel projects. When I ask him, he's always recommended sticking with Delta or Moen for all faucets and shower valves. They are generally pretty affordable and replacement parts / valve cartridges are readily available at most hardware stores.. I think I've installed 7 or 8 of them so far over the past 6 years without an issue. Latest batch I bought were this model: Delta Faucet R10000-UNBX MultiChoice(R) Universal Tub and Shower Valve Body
Symmons Temptrol look to be pretty highly rated, though. I'm interested to hear if any plumbers chime in here!