KOHLER K-3998-UT Wellworth Two-piece elongated 1.28 gpf toilet with tank cover locks and insulated tankWellworth toilets have been an American benchmark for style, innovation, and performance since 1936. This Wellworth high efficiency toilet delivers significant water savings with a 1. 28 gallon flush setting that saves up to 16,500 gallons per year, compared to an old 3. 5 gallon toilet, without sacrificing flush power. This model includes tank lid locks and an insulated tank liner to help prevent condensation on the outside of the tank. Two piece