TOTO® ECOPOWER® 1.28 GPF Toilet Flushometer Valve is ideal for high-traffic spaces, providing an elegant water conservation solution. The in-wall concealed valve adds an additional level of sophistication to the commercial space. Engineered to require no electricity or routine battery replacement, the ECOPOWER Flushometer Valve saves energy and water while providing maximum performance in even the most demanding commercial spaces. Powered by the force of running water, ECOPOWER hydro-turbines create an electrical current that is stored in rechargeable cells to power the sensor of the valve. The ECOPOWER flush valve is highly efficient, replenishing power stores with no minimum daily usage. No external power source or battery replacement is necessary. Ensuring that water flows only when needed, the self-adjusting ECOPOWER sensor eliminates ghost flushing that wastes water. A minimum of six seconds in front of the sensor is required to get its acknowledgement, preventing excessive flushing. A manual override flush button is present when needed. The piston and solenoid mechanism, a marked improvement over traditional rubber diaphragm type valves, maintains consistent flush volume under a range of supply pressures. The valve is WaterSense® certified and CA Title 20 and CalGreen compliant. The valve is also ADA compliant. This flushometer valve is for use with toilets that have 1-1/2 inch back spud inlets. Included: cover plate, 1 inch angle stop, vacuum breaker set for top spud toilets