An American classic, this Wellworth ultra high-efficient toilet tank reduces water consumption without compromising on flushing power. A 1.0-gallon flush reduces water use by more than 35 percent over 1.6-gallon toilets, offering a water savings of more than 4,500 gallons of water per toilet, per year. Pair this tank with a coordinated Highline bowl for a complete toilet. 1.0 gallon per flush (gpf). Standard left-hand trip lever included. Supply line not included. Combines with the K-5297 bowl to create a complete K-5298 toilet. Coordinates with other products in the Wellworth collection.