Toto USA’s Ultra High-Efficiency Urinal and EcoPower Flush Valves are WaterSense-certified and use 0.125 gallons of water per flush in comparison to a unit with a traditional 1 gallon of water per flush. The flush valves use flowing water to power their electronics, eliminating the need for hard wiring. They each contain a backup battery that will last up to 19 years, according to Toto. The valve units, which feature a heavy-duty zinc die-cast cover with a nickel chrome finish, automatically flush every 12 hours if not used. Recessed and exposed versions of the valves are available.; 888.295.8134.