This high-efficiency toilet tank combines water conservation with the versatile style of the KOHLER® 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 1.28 gpf toilet tank features innovative AquaPiston® technology, a patented flush engine that delivers a fast, powerful, and virtually plug-free flush. Pair this toilet tank with a Cimarron toilet bowl for a beautiful, sleek two-piece toilet.

Toilet tank, 1.28 gpf

• Right-hand Polished Chrome trip lever
• Combines with the K-5309 bowl to create a complete K-5310-RA Cimarron toilet
• Coordinates with other products in the Cimarron collection
• Easy-to-flush canister design requires less force to actuate than a 3" (76 mm) flapper, and has 90% less exposed seal material which resists conditions that cause wear, tear, shrinkage and swelling
• 1.28 gpf (4.8 lpf)
• AquaPiston® canister optimizes the flow out of the tank, harnessing gravity and the natural, powerful reducing cascade of water to increase the power and effectiveness of the flush