American Standard Studio S 1.8 gpm/6.8 L/min Tub and Shower Trim Kit With Rain Showerhead, Double Ceramic Pressure Balance Cartridge With Lever Handle - AMS-TU105508

No. TU105508 is trim only, and it is built for use with American Standard Flash shower rough-in valves. You get the rain showerhead, shower arm and flange, brass wall escutcheon, metal lever handle, slip-on diverter tub spout, and the double ceramic pressure balance cartridge. The valve body itself has to be ordered separately, so on a new install you are buying two line items.

It uses a double ceramic pressure balance cartridge, which combines a ceramic disc mixing valve with a ceramic balancing spool in one piece. The spool holds output temperature steady when hot or cold supply pressure shifts, so a toilet flush elsewhere in the building does not spike the shower. There is also an adjustable hot limit safety stop to cap how much hot water can mix in, which is the setting you dial back in student housing or senior living.

Yes. The cartridge has back-to-back capability, so hot and cold can be swapped quickly without repiping. That is the common save on back-to-back bathroom walls and on remodels where the original supplies were run reversed. Integrated check valves are also built in to stop cross flow between hot and cold.

The rain showerhead is rated 1.75 gpm / 6.6 L/min maximum, while the trim kit as a whole is listed at 1.8 gpm / 6.8 L/min. American Standard states it saves 30 percent water versus a standard 2.5 gpm head. That puts it inside the 1.8 gpm ceiling that applies in water-restricted jurisdictions like California.

Four finishes: polished chrome (TU105508.002), matte black (TU105508.243), brushed nickel (TU105508.295), and Brushed Cool Sunrise (TU105508.GN0). If you are standardizing bathrooms across a property, order by that suffix so every unit matches.

No separate diverter control is needed. Diversion is in the tub spout itself, so you pull up on the spout to send water to the rain head and the single lever handle controls temperature and volume. That keeps the wall to one handle plus the escutcheon, which is why this trim suits remodels where you do not want to add another hole.

The double ceramic pressure balance cartridge comes as part of the TU105508 trim kit, and it is a one-piece assembly, which is what makes service straightforward once installed: you pull one cartridge rather than a stack of parts. For maintenance on an existing Studio S valve, ask for the American Standard replacement cartridge for pressure balance shower valves rather than a full trim kit.

Both are metal. The wall escutcheon is brass and the lever handle is metal, not a plated plastic. For multi-family and hospitality turns where handles get pulled on hard, that is the part of the spec worth noting.