Toto THU500S Toilet Flapper

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Red and black rubber flapper with chain.

WHAT 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

$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: Toilet Flappers Tag: Toto USA

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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