This WaterSense(R)-labeled tank combines water efficiency with the versatile style of the Cimarron collection. A 1.28-gallon flush provides significant water savings of up to 16,500 gallons per year, compared to a 3.5-gallon toilet, without sacrificing performance. This tank features innovative AquaPiston(TM) technology, a patented flush engine, that delivers a fast, powerful, and plug-free flush. Pair this tank with the K-4829 or K-4347 bowl for a unified look.