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Kohler GP83996 2″ Toilet Flush Valve Gasket Seal

Grey foam rubber gasket.

chat iconWHAT OUR CUSTOMERS SAY…

“Fantastic! I walked in with parts to the faucet in my vintage sink and walked out with everything I needed. Chain hardware stores suggested I get a whole new sink and/or would not be able to do it without a plumber. The employee at Noels took a quick look, knew what it was, and had it in stock. I was able to fix my sink in two minutes with their help! ”
-Elizabeth A.
03/14/2021

$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…

“I was very happy with Noel’s Plumbing. I was searching for a fairly rare part and saw it listed on their website. After placing my order, I was informed that the item was actually on backorder. Noel’s Plumbing was upfront and honest right away, letting me know it might take some time to arrive. Throughout the wait, they consistently kept me updated, which I really appreciated. When the part finally came in, they shipped it out immediately. It arrived exactly as described and was precisely what I needed. Excellent communication, honesty, and follow-through. Thank you, Noel’s Plumbing! ”
-Dave F.
04/04/2026