American Standard Shower Rough Valve Temperature Calibration Unit - AMS-953957

If the valves are American Standard thermostatic units and the complaint is temperature drift, the calibration unit is the repair path, not a full valve replacement. It's sold as a repair part, so you can stock a few against the fleet and correct openings one at a time without opening walls for new rough-in. Match the part to each valve model first, since the thermostatic line does not use one universal internal.

The unit measures 10.433 x 4.1 x 1 inches and weighs 0.066 pounds. It's a slim assembly, so the constraint on a service call is almost never the part itself, it's the access opening in the wall or the escutcheon cutout you have to work through to reach the valve.

It ships unfinished, listed as NO FINISH, because it's an internal calibration component that sits behind the wall inside the rough valve. Nothing about it is visible once the escutcheon and trim are back on, so trim finish is a separate order.

It's a repair part for American Standard thermostatic shower valves and applies wherever those valves are installed, which covers hotel, multi-family, healthcare and residential bathrooms alike. The deciding factor is the valve model in the wall, not the building type.