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Kohler 87998 Toilet Flush Valve Kit

Black plastic flush valve with red rubber flapper and grey foam gasket.

chat iconWHAT OUR CUSTOMERS SAY…

“The vacuum breaker on my outdoor spigot failed and Noel's Plumbing was the only placeI could find that had the appropriate mfr. part. I sent a text with photos on Wednesday evening to make sure the part I found was correct. In less than 2 hours later, I had a reply confirming it was the correct part. Placed my order that evening and received the part on Saturday afternoon (about 2.75 days) and my plumbing issue was resolved! I highly recommend - I really appreciated the prompt and pleasant response. ”
-Kimberly S.
04/25/2026

$52.17

 

The Kohler 87998 is a genuine, 2-inch black plastic and brass toilet flush valve kit. It features a unique lug-and-twist style mechanism designed specifically to replace leaking or worn-out factory components inside select one-piece Kohler toilet models.

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: 987998 Category: Tag:

Is your Kohler toilet running constantly or flushing weakly? Restore peak performance with the KOHLER 87998 Flush Valve Kit. Designed exclusively as an OEM (Original Equipment Manufacturer) replacement, this corrosion-resistant flush assembly guarantees a perfect seal and reliable, whisper-quiet flushing.

 

87998

 

  • Kohler GENUINE Part
  • Flush valve kit for Gabrielle, Santa Rosa, and other Kohler toilets
  • Compatible with the following Kohler models: Santa Rosa 3323, 3803, 11899, Gabrielle 3322, 14257, 14258, 14286, Kathryn-3324, 14268 and other various models

 

Customer submitted images. 

 

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…

“Just want to say THANK YOU for your help with this! I couldn't believe the handle arrived Thursday (after ordering Wednesday). I brought it up to my dad's house Friday and just looking at it I didn't think it was going to fit....but it fit perfectly. So appreciative for your expertise and quick shipping! ”
-Ashley K.
02/04/2023
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