Automatic flush-valve retrofit kits convert manual flush valves to automatic. These retrofit flushometers replace the handle assembly on a manual valve, so there's no need to remove and replace the entire valve. They are sensor-operated units that help decrease the spread of germs since people don't have to touch the valve to activate it. Their proximity sensor automatically triggers flushing once a user moves out of range. They're ideal for ensuring flushing in public restrooms and high-use areas.