Cimarron 1.28 GPF High Efficiency Toilet Tank with Insuliner Tank Liner and AquaPiston Flush Technology

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This toilet 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 virtually 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.

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  • Features

    Whats in the Box::

    • K-4421-U Toilet Tank
    • Installation Instructions


    • 1.28 gallons per flush (gpf)
    • Standard left-hand Polished Chrome trip lever included
    • Insuliner® tank liner minimizes condensation on the tank when exposed to high humidity
    • Supply line not included
    • Combines with the K-4309 bowl to create a complete K-3609-U Cimarron toilet
    • Coordinates with other products in the Cimarron collection
    • AquaPiston canister allows water to flow into the bowl from all sides (360 degrees), increasing the power and effectiveness of the flush
    • DryLock™ System saves installation time and helps prevent water leakage
    • WaterSense certified