Toilet Seal-Gasket K-GP1059291 Canister Flush Valve Seal - 5 Pack
Pack of five yellow K-GP1059291 canister flush valve replacement seals.
Yellow K-GP1059291 canister flush valve seal for Kohler toilets with 3.4-inch diameter measurement graphic.
Black canister flush valve assembly for toilet repair with red rubber seal.
Yellow rubber K-GP1059291 canister flush valve seal replacement part.
Single yellow K-GP1059291 canister flush valve seal replacement part for easy toilet repair.
Handyman repairing a toilet to demonstrate DIY installation of a K-GP1059291 canister flush valve seal.
Pack of five yellow K-GP1059291 canister flush valve replacement seals.
Yellow K-GP1059291 canister flush valve seal for Kohler toilets with 3.4-inch diameter measurement graphic.
Black canister flush valve assembly for toilet repair with red rubber seal.
Yellow rubber K-GP1059291 canister flush valve seal replacement part.
Single yellow K-GP1059291 canister flush valve seal replacement part for easy toilet repair.
Handyman repairing a toilet to demonstrate DIY installation of a K-GP1059291 canister flush valve seal.

K-GP1059291 Canister Flush Valve Seal - 5 Pack

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$11.39
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$11.39
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K-GP1059291 Canister Flush Valve Seal

Key Features

  • Package includes five seals.
  • Constructed from a durable, chemical-resistant material.
  • Engineered to create a secure seal at the base of the flush valve.
  • Outer diameter is approximately 3.38 inches.

Replaces / Cross-Reference Part Numbers

  • Kohler: K-GP1059291, GP1059291, 2475620, 1049291
  • Korky: 451

Compatibility & Fitment

  • Fits most KOHLER single-flush toilets equipped with a canister flush valve.
  • Compatible with Class Five and Class Six canister toilets.
  • Works with models such as the KOHLER K-4436 tank.

When to Replace

  • If the toilet runs continuously after the tank has filled.
  • When water is audibly or visibly leaking from the tank into the bowl.
  • If the existing seal is cracked, warped, or visibly degraded.

Installation Tips

  • Turn off the water supply and empty the toilet tank before beginning.
  • The seal is located at the bottom of the canister flush valve assembly.
  • Clean the valve base and sealing surface before installing the new seal.
  • Ensure the new seal is seated flat and evenly to prevent leaks.
K-GP1059291 Canister Flush Valve Seal - 5 Pack 1
K-GP1059291 Canister Flush Valve Seal - 5 Pack 2
  • K-GP1059291 Canister Flush Valve Seal - 5 Pack 1

    SOLVE LEAKING PROBLEMS

    The K-GP1059291 Canister Flush Valve Seal addresses leaking issues by providing a tight seal between the flush valve and the toilet tank.
  • K-GP1059291 Canister Flush Valve Seal - 5 Pack 2

    REDUCE WATER BILL

    By replacing the old seal with a new one, the toilet's flushing system operates more efficiently, resulting in a lower water bill for the household.
  • K-GP1059291 Canister Flush Valve Seal - 5 Pack 3

    ENHANCED FLUSHING POWER

    A new K-GP1059291 Canister Flush Valve Seal enhances flushing power by tightening the flush valve and the toilet tank outlet.
  • K-GP1059291 Canister Flush Valve Seal - 5 Pack 4

    SIMPLE INSTALLATION

    BlueStars K-GP1059291 Canister Flush Valve Seal is very simple to install and anyone can do it with no tool required.
ECONOMICAL DIY REPAIR

ECONOMICAL DIY REPAIR

Enjoy the comfort that our K-GP1059291 Canister Flush Valve Seal bring into your toilets - BlueStars provides DIY solutions to help you deal with any trouble!

Compatible Models

Locate the model number of your appliance or equipment on the manufacturer's label and use it to check compatibility before ordering

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Part Number
‎K-GP1059291
Item Weight
‎0.634 ounces
Color
‎As Pictured
Style
‎Pack of 5
Material
‎Rubber
Shape
‎Round
Cutting Diameter
‎3.38 Inches
Usage
‎Toilet Replacement Parts
Assembled Diameter
‎3.38 Inches

FAQs

This seal is designed for all Kohler single-flush Class 5 and Class 6 canister-style toilets.
The most common sign is a toilet that runs intermittently or 'ghost flushes' on its own. If you notice the water level in the tank dropping or hear the fill valve cycling periodically without the toilet being used, the seal has likely hardened, cracked, or accumulated mineral buildup, preventing a watertight closure.
Replacing the seal is a straightforward task that typically takes 5 to 10 minutes. You do not need any specialized tools. You will need to turn off the water supply, flush the toilet to empty the tank, and manually lift the canister assembly out of the flush valve to slide the old seal off and install the new one.
Over time, the rubber material can degrade due to exposure to hard water minerals, chlorine, or other chemical cleaners used in the tank. These conditions cause the seal to lose its flexibility and shape, resulting in a compromised seal against the flush valve seat.
Before installing the new seal, thoroughly clean the flush valve seat where the seal makes contact. Use a soft cloth or a non-abrasive sponge to remove any mineral deposits or debris from the plastic surface. A clean, smooth surface is essential for the new seal to seat properly and prevent future leaks.