American Standard Ultima Selectronic Touchless Toilet Flush Valve, Piston-Type, Battery, 1.6 gpf/6.0 Lpf - AMS-6065161

1.6 gpf, which is 6.0 Lpf. Match that to the bowl: a fixture engineered for 1.6 gallons flushes properly on this valve, but a 1.28 gpf high-efficiency bowl gets more water than it was designed around, and a 3.5 gallon older bowl may not clear on 1.6. The flush volume is fixed on this model, so the bowl rating is the thing to confirm.

No wiring or transformer. The Ultima Selectronic valve runs on a CR-P2 lithium battery that comes installed in the valve, rated at 8 years. For a retrofit in an existing restroom that means no conduit, no low-voltage run, and no electrician on the job, which is usually why this version gets specified over a hardwired sensor valve.

It fails closed. On loss of power or loss of water pressure the valve automatically shuts, so you do not get a valve stuck open flooding a stall. There is also a fully mechanical manual override that works with no power at all, so staff can still flush the fixture while a dead battery is waiting to be replaced. For a property manager running restrooms across a portfolio, that override is what keeps a stall in service instead of taped off.

Piston-type. The practical difference for a maintenance crew is the rebuild: a piston valve is serviced by replacing the piston assembly rather than a diaphragm kit, so stock the parts that match. This one also uses American Standard's DynaClean wiper spring, which scrubs the refill orifice on every flush to keep the valve from running on. Run-on from a fouled orifice is the single most common callback on flushometers in hard or dirty water, and that spring is the answer to it.

The valve body is a proprietary brass alloy that resists dezincification, the failure where zinc leaches out of brass and leaves a porous, weakened casting. That is the standard concern in chlorinated or aggressive water supplies and in buildings where valves sit under constant pressure. It is the reason this valve gets specified for high-traffic institutional restrooms rather than a plain yellow-brass body.

A sensor valve like the Ultima Selectronic flushes without anyone touching it, which is the point in high-traffic public restrooms where limiting hand contact matters and where users walking away from an unflushed bowl is a housekeeping problem. A manual handle valve is simpler and has nothing electronic to maintain, and it is usually the right call in a low-traffic back-of-house or single-occupant restroom. The tradeoff on the sensor version is the battery, and this one is rated 8 years with a mechanical override in the meantime, so the maintenance burden is a battery swap rather than a service call.

Chrome, part number 6065161.002. That is the single finish offered on this valve, so for a restroom being standardized on chrome trim and exposed piping it drops straight in. If the specification calls for a different finish on exposed flushometers, this model will not match it.