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Tank Conversion Kit 1B1X for Kohler K-84499

Plastic flushvalve & ballcock with rubber flapper gasket and supply tube.

chat iconWHAT OUR CUSTOMERS SAY…

“They had the part for my old plumbing system, that I wasn't able find at other places. Helpful people at the counter. ”
-Aleksandre
08/18/2026

$121.47

 

The 1B1X Tank Conversion Kit (Part #K-84499) is a kit engineered specifically to completely overhaul the internal mechanics of older, “low boy” style one-piece Kohler toilets.

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: 12760 Category: Tag:

Stop dealing with a constantly running toilet and restore its original, high-performance flush with the 1B1X Tank Conversion Kit (K-84499). Specially designed for older, low-profile, one-piece toilets, this complete rebuild package includes every internal mechanism needed to refresh your toilet tank.

 

K-84499

 

  • Replaces all vital internal tank mechanisms at once to ensure seamlessly synchronized performance.
  • Resolves common issues such as slow tank filling, continuous running water, and faulty seals.
  • Tailored for quick, trouble-free installation by professional plumbers or DIY homeowners alike.

Common questions about this product

Will this item replace the original OEM part? chevron-icon

Yes, this aftermarket part will replace your OEM 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 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
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