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Kohler K-GP51487 Tank Bolt Assembly Kit Gasket

Black rubber gasket with brass screws washers and nuts.

chat iconWHAT OUR CUSTOMERS SAY…

“After trying all over my area, I couldn't find the part for the faucet in my older house. The part I needed was found on the first try on their website and ordering was very easy. It was after hours, but someone responded to my text right away. The part was shipped the next business day. After putting the new part in the faucet works better than it has for years! ”
-Mark B.
06/25/2026

$25.17

 

The Kohler K-GP51487 is a genuine service part designed for most two-piece toilets. It is a complete tank-to-bowl assembly kit used to create a leak-free seal between the toilet tank and the bowl.

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: 12705A Category: Tag:

Stop annoying toilet leaks and restore your bathroom’s efficiency with the Kohler K-GP51487 Genuine Part Tank Gasket Kit. Engineered specifically for most Kohler 2-piece toilets, this kit provides a secure, watertight seal between the tank and the bowl.

 

K-GP51487

 

  • Kohler GENUINE Part
  • For most two-piece toilets
  • Includes bolts, gaskets, washers, nuts and screws
  • Gaskets are made with superior material to ensure a proper seal

 

Related Documents

 

K-3510 Toilet Parts Breakdown

 

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…

“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
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