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Toto THU500S Toilet Flapper

Red and black rubber flapper with chain.

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

$21.47

 

The TOTO THU500S is a genuine 3-inch universal replacement toilet flapper to fix leaking, running, or poorly flushing toilets. It features an adjustable polypropylene frame with a rubber sealing surface, allowing you to rotate a numbered dial on the flapper to match the exact water-drop requirements of your specific TOTO toilet model.

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: 33312 Category: Tag:

Fix your running toilet with the ultimate genuine replacement part. The TOTO THU500S 3-Inch Universal Toilet Tank Flapper is the ideal choice for homeowners and plumbing professionals looking to eliminate leaks, stop ghost flushing, and restore original flushing performance.

 

THU500S

 

  • Replacement flapper for 3″ flush valves
  • Replaces THU138S, THU175S, THU331S, THU140S, THU299S, THU253S, THU277S, THU347S, THU275S, THU332S, THU369S, and THU499S
  • Red flapper

 

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.

 

 

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