The Zurn HydroVantage™ flush valve is designed to create energy during each flush cycle. The valve is equipped with a hydro generator and a back-up battery. The hydro generator system harvests energy from the water as it passes through the valve. The turbine spins creating electrical energy which is then stored in a rechargeable cell. This stored energy then powers the electrical needs of the flush valve for subsequent flushes, eliminating the need for external electrical power or battery replacement for 10+ years under normal operating conditions. br br The HydroVantage flush valve provides optimal energy efficiency, low maintenance and ease of installation compared to other available generator products. It also features Environmental Trending™ and 4.0 Sensor Technology™ that continuously monitors ambient light levels and traffic patterns within the restroom. These features minimize false flushing while maximizing power savings. www.zurn.com.