American Standard Exposed, Top Spud, Automatic Flush Valve, For Use With Category Urinals, 1.0 Gallons per Flush - 6063101.002Automatic urinal flush valves are sized to fit urinals. These sensor operated valves have a spud coupling for attaching to a urinal spud.,Automatic flush valves are sensor operated valves for flushing tankless toilets and urinals. Also known as automatic flushometers, these flow control devices don't require user contact to activate, so they help decrease the spread of germs. Their sensor automatically triggers flushing after a set time period or once