KOHLER Cimarron 1.28 GPF High Efficiency Toilet Tank Only with AquaPiston Flushing Technology in White-K-4421-RA-0 - The Home Depot


Model # K-4421-RA-0

Internet # 203158961

Store SKU # 977496

Cimarron 1.28 GPF High Efficiency Toilet Tank Only with AquaPiston Flushing Technology in White

KOHLER Cimarron 1.28 GPF High Efficiency Toilet Tank Only with AquaPiston Flushing Technology in White

This item has been discontinued.
The Home Depot no longer carries this specific product.

$112.58 / each


Model # K-4421-RA-0

Internet # 203158961

Store SKU # 977496

Store SO SKU # 285286

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 Pair this tank with the K-4309 bowl for a complete toilet.

  • 1.28 gallons per flush (gpf)
  • Standard right-hand Polished Chrome trip lever included
  • Supply line not included
  • Combines with the K-4309 bowl to create a complete K-3609 Cimarron toilet
  • Coordinates with other products in the Cimarron collection
  • Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong siphon during flushing
  • AquaPiston canister allows water to flow into the bowl from all sides (360 degrees), increasing the power and effectiveness of the flush
  • Flush valve's 3: 2 ratio harnesses the natural force of gravity and optimizes flush performance
  • Durable canister design has 90% less exposed seal material than a 3 in. flapper, for leak-free performance
  • Light-touch canister flush requires a lower actuation force than a flapper.
  • AquaPiston canister flush valve optimizes flush performance and resists warping and deterioration.
  • DryLock System saves installation time and helps prevent water leakage.
  • WaterSense toilets meet strict EPA flushing guidelines, including using at least 20 percent less water than 1.6-gallon toilets.
  • Eligible for consumer rebates in some municipalities.

    Kohler AquaPiston Flushing Technology

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Assembled Depth (in.)  8 in  Assembled Height (in.)  14.25 in 
Assembled Width (in.)  17.625 in  Flush Valve Size (in.)  3.25 
Product Depth (in.)  Product Height (in.)  14.25 
Product Width (in.)  17.625 
Collection Name  Cimarron  Color Family  White 
Color Family  White  Color/Finish  White 
Flushing Mechanism  Gravity Flush  Flushing Technology  Gravity Fed 
Gallons Per Flush  1.28 gal (US)  Handle Included  Yes 
Material  Vitreous China  Pressure Assisted  No 
Product Weight (lb.)  33.5 lb  Returnable  90-Day 
Toilet Features  No Additional Features  Toilet Included Components  Handle 
Trip Lever Location  Right-hand  Trip Lever Location  Right Side 
Warranty / Certifications
Certifications and Listings  ADA Compliant  Manufacturer Warranty  One-Year Limited Warranty 



Standard Shipping includes delivery by small parcel service. Processing time varies by product.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.