The PumpBuddy valve is an outlet control device that allows variable minimum and maximum water level settings within a water tank when filling from a pump. For rainwater harvesting applications, it works as a backup water supply control valve, in the event demand exceeds rainfall. - Adjustable water levels save electricity & increase pump life - Full on, full off - No float switches, no power required (pump requires pressure switch) - Fewer parts mean fewer problems - Long tail available, no tank fittings