An American classic, this Wellworth high-efficiency toilet tank reduces water consumption without compromising on flushing power. Its economical 1.28-gallon flush setting provides significant water savings of up to 16,500 gallons per year compared to a 3.5-gallon toilet. This tank features a protective lining coating the inside to prevent beaded moisture. It can be combined with a coordinated bowl for a customized ensemble. 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. Combines with the K-5393 bowl to create a complete K-5481-U Highline toilet. Coordinates with other products in the Wellworth collection.