Toto TEW6GNC Exposed Eco-Electronic Flush Valve. Toto provides users with an extensive line of advanced plumbing systems. Of those systems, sensor operated flush valves for facilities that demand the finest sanitation equipment. These hands-free Electronic Flush Valves reduce water consumption, and improve the sanitary conditions. Electronic Flush Valves are ideal especially for high use restroom in schools, hospitals and stores. This Toto TEW6GNC Exposed Eco-Electronic Flush Valve features a Hydropower system that is powered by a self-generating power system. This feature provides all users with a peace of mind when it comes to water use and power consumption. This Valve has 4 features that make it ideal for toilets that are highly used. These features include; an infrared sensor, flushing after 6 second in place reading, flushing every 24 hours as a hygiene precaution, and also a manual flushing button for maintenance. This Valve feature a durable Nickel Chrome finish that will look great in any area.