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Kohler 1B1X Tank Conversion Kit 84499

Complete plastic flush vale flapper ballcock ball and supply tube.
Complete plastic flush vale flapper ballcock ball and supply tube.

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

$198.17

 

The Kohler 84499 (also known as the K-84499) is a genuine Kohler 1B1X Tank Conversion Kit explicitly designed for repairing older, low-boy, one-piece Kohler toilets. It replaces outdated or discontinued tank assemblies (such as the 84498) to restore original flushing and filling performance.

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

SKU: 12768a Category: Tag:

Stop stubborn toilet leaks and restore quiet, efficient flushing with the Genuine KOHLER 84499 (1B1X) Tank Conversion Kit. This comprehensive plumbing repair kit is engineered by Kohler specialists to completely rebuild the inside of your vintage toilet tank, upgrading old or discontinued ballcock systems to code-compliant, long-lasting assemblies.

 

  • Kohler GENUINE Part
  • Compatible with older style one-piece toilets
  • Includes fill valve, flush valve, flapper and gaskets – all components in the tank
  • Made with premium materials for enhanced durability

 

84499     1B1X

 

Related Documents

 

1B1X Tank Conversion Kit Instructions

 

K-3401 Parts Breakdown

 

K-3385 Parts Breakdown

 

Customer submitted image. 

 

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 sent in photos of a broken cartridge (still installed, couldn’t take it out myself due to water shut-off restrictions in a condo) and even with the limited view they were able to tell me the exact part I needed so I could have it ready for the plumber (meaning I didn’t need to pay for a plumber to come out twice!!) ”
-Alaina W.
06/27/2026
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