My current bathroom has original 1926 fixtures - fixed shower arm, separate hot and cold porcelain handles, diverter located between the hot and cold handles, and a tub spout.

My co-op now requires a thermostatic valve.

All I need is a tub spout and handheld (no fixed shower arm). If I buy a wall union, hose, handheld, slider bar, handheld holder, tub spout with diverter, thermo valve rough-in, and trim with temperature and volume control handles (both in same trim), do I need anything else?

Thank you. This is so overwhelming.

Since you're in a co-op, you'll probably need the thermo valve to have "stops", you can check your restrictions to see if it's required. Most valves are sold "with stops" or "without stops".

Even if it's not required, stops are a good thing to have in a multi-unit building, you can do maintenance on your valve without having to shut down the building's water supply.

Is valve maintenance a normal occurrence? I am operating, perhaps incorrectly, under the impression that my plumbing fixtures shouldn't require maintenance for at least 10 years. (If so, I'd better buy more tile now! :>)

I am writing as I was told something today about shower fixtures that had been suggested to me previously. It was suggested today that instead of purchasing a trim that has a temperature and volume control, and a tub spout with a diverter, I instead buy a regular tub spout, and buy two volume controls and one temperature control. By doing it this way, I can place the controls anywhere I want, say, the temperature control half way between the handheld and the tub spout, one volume control near the handheld and one near the tub spout. It is also less expensive to buy three separate trims and valves, and I don't have to deal with the diverter on the tub spout. I can also have water coming out of the handheld, tub spout, or both.

Neat-o!