Heavy duty float valve for tanks, barrels, troughs and pans. Self-flushing non-corrosive. For gravity or pressure. Valve seat raised for easy clearance of foregin particles. All-Poly construction. Neoprene gasket guaranteed indefinitely. Max flo 11 gallons an hour gravity fed. 45-90 gallons an hour pressure fed. 8" LFits 1/2" or 1/4" pipe.