American Standard SELECTRONIC Ultima™ Selectronic Concealed Toilet Flush Valve with Wall Box, Base Model, Piston-Type, 1.6 gpf/6.0 Lpf

 Self-Cleaning Piston with integral wiper spring significantly reduces clogging and maintenance• Selectronic® Proximity System with universal sensor provides hygienic, “hands free” operation• State-of-the-Art Electronics prevent ghost flushing• Dezincification Resistant semi-red brass alloy• Fully Mechanical Manual Override Button can flush the valve without power• Fail-Safe: Valve automatically closes upon loss of power or water pressure and does not need to be reset• Adjustable Sanitary Flush cleans the fixture & maintains the trap seal.• Chemical resistant EPDM Seals for extended life• Adjustable tailpiece for rough-in flexibility• Can be installed left or right handed• All exposed parts are chrome-plated