Sorry you did not get an answer.

The problem may be that Rohl sells many faucet lines, so when you refer to a Rohl shower, it may not be possible to answer as there are many shower valves sold by Rohl from many different manufacturers.

If you settle on a particular model, you might inquire again.

California faucets has designed and manufactures its own thermostatic valve. By reputation it is a good one, although we have not yet installed one.

Thanks! It sounds like Rohl only makes the trim, and from what I see on the website, when it comes to trim for thermostatic valves, they make the same style over and over. Bleh. California Faucets definitely sounds like a better way to go. Not only do they have more of a trim variety, but they make their own valves.