An American classic, this Wellworth high-efficiency toilet tank features innovative technology for powerful, low-consumption flushing. At an economical 1.28 gallons per flush, this tank offers up to 16,500 gallons of water savings per year compared to a 3.5-gallon toilet. A protective coating on the inside of the tank helps keep moisture from condensing 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¬Æ tank liner minimizes condensation on the tank when exposed to high humidity. Tank locks included. Supply line not included. Combines with the K-4199 bowl to create a complete K-3999-UT Highline toilet. Coordinates with other products in the Wellworth collection.