An American classic, this Wellworth high-efficiency toilet tank features innovative technology for powerful, low-consumption flushing. At 1.28 gallons per flush, this economical tank provides up to 16,500 gallons of water savings per year compared to a 3.5-gallon toilet. A protective coating lines the inside of the tank to prevent beaded moisture on the outside. This streamlined tank combines with a coordinated bowl to offer a high-efficiency flush. 1.28 gallons per flush (gpf). Standard left-hand trip lever included. Insuliner® tank liner minimizes condensation on the tank when exposed to high humidity. Supply line not included. Combines with the K-4199 bowl to create a complete K-3999-U Highline toilet. Coordinates with other products in the Wellworth collection.