An American classic, this KOHLER® 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 1.0 gpf toilet tank with a coordinated bowl for a complete toilet. Kohler® Toilet Tank, Wellworth®, 1 gpf, Left Hand Lever Flush, 12 in Rough-In, Floor Mount, 14-3/4 in Height, Vitreous China, White