Self-Powered Hydroelectric Flush Valve System; No Minimum Daily Usage Requirement; True Mechanical Flush Override; 6-Second Detection Time to Prevent Ghost Flushing; EcoPower Power Supply, Auto Function; CA Title 20, CalGreen Compliant; ADA Compliant; WaterSense® Certified 1-1/4", Threaded x Threaded, 1.28 GPF, Chrome Plated Solid Bronze, Automatic Infrared Sensor Actuation, Top Spud, Self-Cleaning, Piston, High Efficiency, Flush Valve for Toilet