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Kohler GP83996 2″ Toilet Flush Valve Gasket Seal

Grey foam rubber gasket.

chat iconWHAT OUR CUSTOMERS SAY…

“Fast, friendly, knowledgeable, hard to find items not carried by most big box stores. ”
-William S.
02/23/2026

$12.47

 

The Kohler GP83996 is a genuine Kohler 2-inch toilet flush valve gasket seal specifically designed to fix leaking, running, or constantly trickling water in various one-piece Kohler toilets. It fits around the bottom of the canister/cylinder flush valve assembly to create a watertight seal between the valve body and the ceramic toilet tank.

We can ship anywhere the US Postal Service ships. For orders being shipped outside the US, please contact us at (888) ASK-NOEL, noelsplumbingsupply@fuse.net, or via the text widget on this screen.

SKU: 12758c Category: Tag:

Is your one-piece Kohler toilet constantly running, leaking at the tank-to-bowl connection, or suffering from a weak flush? The Kohler GP83996 Flush Valve Gasket is a genuine, direct-fit replacement designed to instantly restore your toilet’s peak water efficiency and performance.

 

GP83996

 

  • Kohler GENUINE Part
  • 2″ gasket seals flush valve to the tank

 

Common questions about this product

Is this item the original manufacturer's recommended replacement part? chevron-icon

Yes, this is the OEM recommended part.

Is this the correct item for my application? chevron-icon

If you’re not sure text us a picture 1-888-275-6635 or email us a picture at noelsplumbingsupply@fuse.net.

 

We will make sure you have the right part.

 

 

chat iconWHAT OUR CUSTOMERS SAY…

“We were able to buy parts for our antique toilet here! Unfortunately, the toilet fell off the wall so we had to return the parts before we got the chance to use them. But returning was quick and easy! The staff is super helpful. ”
-Dori M.
09/23/2023