American Standard Ultima Touchless Sensor Urinal Flush Valve, Diaphragm-Type, 0.5 gpf/1.9 Lpf - AMS-6145SM051

It runs on batteries, and four C-size alkaline batteries ship with it. No electrical rough-in, no transformer, no conduit to the valve, which is why it's a common retrofit choice in existing restrooms where there's no power at the fixture.

Urinal only. It flushes at 0.5 gpf / 1.9 Lpf, which is a urinal volume. A water closet needs a much higher volume valve (typically 1.28 or 1.6 gpf), so don't substitute this on a toilet.

There's an electronically operated override button on the valve, so a user or a maintenance tech can trigger a flush without waiting on the sensor. It's an electronic push, not a mechanical handle, so it still depends on battery power.

That's exactly what the EvoLast diaphragm material is for, it's a chlorine- and chloramine-resistant compound meant to resist premature deterioration and failure. Pair that with DynaClean, an integral wiper spring that cleans the refill orifice on every flush to keep the valve from running on, and you've addressed the two most common failure modes on a diaphragm urinal valve.

Diaphragm type. For an MRO stockroom that means your repair part is a diaphragm kit rather than a piston assembly, and the body uses a proprietary brass alloy that resists dezincification, which matters where water chemistry is aggressive.

It's a commercial-duty product, part of American Standard's Selectronic diaphragm flush valve family. Touchless actuation is the main draw for schools, healthcare, airports and stadium restrooms where hands-free operation limits germ transfer and cuts down on handle abuse.