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SPECIFIC FIT FOR TOTO FLAPPER MODEL THU138S – Flapper features an oversized sealing surface to fit large 3″ TOTO flush valves
FITS TOTO G-MAX TOILET MODELS: CST743S, CST743SD, CST743SDB, CST44S, CST44SD, CST44SDB, CST44SLD, CST44SLDB, CST54SF, CST64S, CST774S, CST784SF, CST79SF, CST804S, MS756204SF, MS853113S, MS854114S, and MS874114S
QUICKLY FIX running and leaking toilets and eliminate costly water waste
MADE IN USA – Proudly made in America and backed by a 5 year warranty
EXCLUSIVE LONGEST LASTING red rubber resists chlorine, bacteria, city water treatment, hard water, and well water
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Product Description Korky 2021BP G-Max Flapper For TOTO Toilet Repairs – Large 3-Inch Flapper – Easy to Install – Made in USA From the Manufacturer The Fits TOTO G-Max 3″ Flapper by Korky features an oversized sealing surface to fit large 3″ TOTO flush valves. The exclusive longest lasting red rubber resists chlorine, bacteria, city water treatment, hard water, and well water. Authorized replacement for TOTO G-Max flapper model THU138S. Made of flexible rubber for a tight seal and easy to install, the 2021 includes: (1) Large 3″ Flapper and (1) Stainless Steel Chain.
789 customer reviews
4.3 out of 5 stars
|Best Sellers Rank||
#339,366 in Tools & Home Improvement (See top 100)
|Shipping Information||View shipping rates and policies|
|Date First Available||July 31, 2018|
Product Warranty: For warranty information about this product, please click here
November 14, 2015
It appears to be similar to the original with a few changes.
-they eliminated the rim at the edge, and added some support columns off the center section. This hopefully will prevent some of the cupping seen in the last photo.
-the chain sleeve is missing, which i just transferred from the old part. This sleeve helps prevent the chain from getting bound up when it’s in the resting position.
-the hook type is different, so follow the guide on the back of the package regarding chain placement. I think it was one or two less than original.
I came across this part by looking for original part number for my toilet model ST743S, which was THU175S, replaced by THU331SS, then replaced by THU499SS which is the universal catch all number. Reviews for that universal part suggested that manufacturers had changed, quality had dropped and problems were common. This part was suggested by someone’s contact to tech support to match the original part by the original third party manufacturer.
Installation was successful with no leaking. Will update with any problems.
October 21, 2012
So far as the flapper, I actually got the first one from my local Ace Hardware because I didnt think to check Amazon, silly me. I’m buying the second one from Amazon.
I installed the original one and it fit perfectly. It does indeed come with the chain, and the documentation it has says its guaranteed for 5 years. I shot an email to the manufacturer to see exactly how it works so I’ll update my review when they respond. Why only 3 stars? I’m withholding a perfect review until I hear back on the guarantee.
Update: Got an email response from the manufacturer, Lavelle Industries. Based on the below, this feels like a no-brainer…5 year guarantee at half the cost of the Toto-labeled flappers.
[Response from Lavelle Industries]
“Thank you for contacting us, and for purchasing our Korky product!
There is no need to register the flapper. Simply keep our number on hand along with the flapper model number. If in the event you do need to replace the flapper, give us a call and state you need a warranty replacement and we will be glad to send one your way.”