Kohler 4421-U-7 Cimarron 1.28 GPF High Efficiency Toilet Tank with AquaPiston Flush Technology and Insuliner Tank Liner - Black

This WaterSense-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 technology, a patented flush engine, that delivers a fast, powerful, and plug-free flush. An insulating liner helps prevent condensation on the outside of the tank. Pair this tank with the K-4309 bowl for a complete toilet.