An American classic, this Wellworth high-efficiency toilet tank features innovative technology for a powerful, low-consumption flush. At 1.28 gallons per flush, this economical tank offers up to 16,500 gallons of water savings per year compared to a 3.5-gallon toilet. A protective lining coating the inside of the tank prevents beaded moisture on the outside. Its streamlined design matches a coordinated bowl for a complete ensemble. 1.28 gallons per flush (gpf). Right-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-3949-RZ Highline toilet. Coordinates with other products in the Wellworth collection.