American Standard Ultima Manual Toilet Flush Valve, Diaphragm-Type, 1.28 gpf/4.8 Lpf, 27-Inch Rough-In - AMS-6147122

The valve ships with a 27 inch (686 mm) rough-in, and the pipe can be cut during installation to suit a shorter dimension from the wall supply to the bowl. That makes it usable on openings under 27 inches without ordering a different length.

It flushes at 1.28 gpf / 4.8 Lpf, which is the high-efficiency water closet rate. Pair it with a bowl rated for 1.28 gpf; putting it on an older 3.5 gpf bowl designed for a higher volume can leave you with carry problems.

The handle is an ADA-compliant non-hold-open type, so it shuts off automatically after every flush rather than requiring the user to hold it down. That's the detail that matters on a restroom being built or renovated to accessibility requirements.

Yes. The Ultima manual flushometer can be installed left- or right-handed, so a stall where the wall or grab bar forces the handle to the other side is no problem with the same part number.

Run-on usually comes from a clogged refill orifice on the diaphragm. This Ultima uses DynaClean, an integral wiper spring that scrubs the refill orifice on every flush to keep it clear. The diaphragm itself is EvoLast material, chosen to resist chlorine and chloramine so it doesn't break down early in treated municipal water.

Manual. The Ultima 6147122 is handle-operated with no sensor, battery, or power supply to maintain. If you need touchless operation for a high-traffic public restroom, you need a sensor-operated flushometer instead, not this one.

The body is a proprietary brass alloy that resists dezincification, which is the failure mode that eats ordinary brass in aggressive water. It also carries a high back pressure vacuum breaker to help stop dripping at the breaker under back pressure. Between those and the chlorine-resistant diaphragm, it's built for the kind of repeat service a property manager sees across a fleet of restrooms.

Chrome, ordered as American Standard 6147122.002. That's the polished chrome finish code on the end of the model number, and it is the finish this diaphragm flushometer is offered in.

Diaphragm-type. That matters for maintenance stock: rebuild kits and repair parts are not interchangeable between diaphragm and piston flushometers, so a building standardizing on this Ultima should be stocking diaphragm repair parts.