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Kohler GP83996 2″ Toilet Flush Valve Gasket Seal

Grey foam rubber gasket.

chat iconWHAT OUR CUSTOMERS SAY…

“Just before an event, we had a 9 7/8" round drain cover snap in half. It was an odd size and Noel's was the only place that seemed to have one that would fit. We couldn't leave the hole exposed during the event, and Noel's was kind enough to make sure it was overnighted to us. Their effort was truly appreciated and the cover fit perfectly! I highly recommend them! ”
-Linda C.
03/27/2026

$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…

“Thank you very much. Your customer service is outstanding. Since I want to keep my very old (1988) Kohler San Raphael toilet for years to come. , it’s good to know that you have parts I could need in the future! ”
-Cathy G
10/31/2024