Best Kohler Toilet Water Tanks in 2026

Insulated tank to prevent sweating

Provides clean and modern finish with no visible pipe work or tank

Combines with K-4197 Wellworth round-front toilet bowl to create K-3577 Wellworth round-front toilet with 12-Inch rough-in

1.28 gpf High-efficiency toilets provide significant water savings of up to 16,500 gallons per year versus an old 3.5 gallon toilet without sacrificing performance

Flow Rate: 1.28 gallons-per-flush

Tank Depth: 8-1/2"

WaterSense certified - toilet uses 20% less water than the current standard while maintaining superior performance

12" rough-in

Class Five(R) - provides tremendous bulk waste flushing performance and best-in-class bowl cleanliness

3-bolt Installation - Three pre-installed tank bolts save installation time

Canister flush valve provides smooth flushing actuation with consistent water usage, flush after flush

1.6 gpf

Standard left-hand Polished Chrome trip lever included

Supply line not included

Coordinates with other products in the Cimarron collection

Adjustable height allowing the bowl to be set anywhere from 15-3/8 inches to 28-1/2 inches from floor

Dual flush actuator offers a choice of 0. 8 or 1. 6 gallons per flush (gpf)

Works with K-6299 or K-6918 bowls and K-4177, K-8857, K-75891, K-5413, K-75890, or K-77271 flush actuator plates to create a complete solution

Dual-flush technology allows you to choose between a full or partial-flush

Durable steel frame carrier is installed on 2x4 inches studs behind the wall. See installation guide for more detailed information

When installed per Kohler's installation instructions, the Kohler in-wall tank and carrier system can support up to 880 lbs without damage

Supply line not included

Combines with the K-5393 bowl to create a complete K-5481 Highline toilet.

Coordinates with other products in the Wellworth collection.

12" rough-in

Class Five(R) - provides tremendous bulk waste flushing performance and best-in-class bowl cleanliness

3-bolt Installation - Three pre-installed tank bolts save installation time

Canister flush valve provides smooth flushing actuation with consistent water usage, flush after flush

1.28 gpf high-efficiency toilets provide significant water savings of up to 16,500 gallons per year versus an old 3.5-gallon toilet without sacrificing performance

Single-flush gravity uses the force of gravity and a precision-engineered tank, bowl, and trapway to create a strong siphon during flushing

Dual-flush technology allows you to choose between a full- or partial-flush.

Combines with the K-6299 bowl to create a complete K-6303 Veil toilet or with a K-6300 bowl to create a complete K-6304 Veil toilet.Max static pressure:80 psi (551.6 kPa)

Dual-flush technology allows you to choose between a full- or partial-flush.

This product can help a building earn Water Efficiency points in the LEED Green Building Rating System.

Combines with the k-5309 bowl to create a complete k-5310 Cimarron toilet

Coordinates with other products in the Cimarron collection

Class Five Flushing system.

Includes left-hand polished chrome trip lever.

Combines with the k-4144 bowl to create a complete k-3814 Corbel toilet

Aquapiston canister allows water to flow into the bowl from all sides (360 degrees), increasing the power and effectiveness of the flush

Durable canister design has 90% less exposed seal material than a 3-inch flapper, for leak-free performance

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

Easy-to-flush canister design requires less force to actuate than a 3-in (76 mm) flapper, and has 90% less exposed seal material which resists conditions that cause wear, tear, shrinkage and swelling

Standard left-hand Polished Chrome trip lever included

Supply line not included