American Standard Serin Valve Only Trim Kit With Double Ceramic Pressure Balance Cartridge With Lever Handle - AMS-TU064500

Trim only. The Serin TU064500 is a valve-only trim kit, so you get the escutcheon, metal lever handle and the double ceramic pressure balance cartridge, but no valve body. It's made for use with American Standard Flash shower rough-in valves, which you order separately.

Pressure balance. The Serin TU064500 uses a one-piece double ceramic cartridge that combines a ceramic disc mixing valve with a ceramic balancing spool. The spool holds output temperature steady when hot or cold supply pressure changes, which is what keeps someone from getting scalded when a toilet flushes. It is not a thermostatic valve, so you set temperature by handle position, not by a numbered dial.

Yes. The Serin trim has back-to-back capability, so hot and cold can be reversed quickly during install without re-piping the wall. Useful on back-to-back bathroom stacks in multi-family where the rough got run mirrored.

Two finishes: polished chrome, ordered as TU064500.002, and brushed nickel, ordered as TU064500.295. For a property manager standardizing bathrooms across a building, those are the only two options in this trim, so pick the one that matches the rest of the Serin suite on the job.

Yes. The cartridge has an adjustable hot limit safety stop that caps how much hot water mixes with the cold, which is what you set during commissioning in a hotel, dorm or assisted living unit. It also has a Comfort Zone range, giving a wider band of handle travel within the useful temperature zone so users can fine tune without overshooting.

No. Integrated check valves are built into the cartridge specifically to eliminate cross flow, so hot doesn't migrate into the cold line through the valve. That matters on shared supply systems and on installs feeding a hand shower.

Valve-only means one handle controlling on/off and temperature for a single outlet, with no diverter and no tub spout port. Use it for a shower-only stall, or downstream of a separate diverter. If you need to split flow between a tub spout and a showerhead, or between a head and a hand shower, a valve-only trim like the Serin TU064500 won't do it and you need a diverter trim instead.

Yes, the mixing valve and balancing spool live in a single one-piece cartridge, so maintenance is one pull and one replacement rather than servicing two components. The ceramic material isn't affected by mineral deposits or hard water, which is why these hold smooth handle operation in buildings with aggressive water.

Metal lever handle. That matters for high-traffic commercial and hospitality openings where plastic handles crack, and a lever is the easier shape for users with limited grip compared with a knob.