Manufacturer | Toto |
---|---|
Part Number | THU500S |
Product Dimensions | 12.07 x 8.89 x 6.35 cm; 90.72 g |
Item model number | THU500S |
Is discontinued by manufacturer | No |
Size | 3 Inch |
Colour | Red (1 Pack) |
Material | Plastic |
Installation Method | Accessory |
Item Package Quantity | 1 |
Usage | Inside |
Included Components | flapper |
Batteries Included? | No |
Batteries Required? | No |
Warranty Description | Manufacturer One Year Limited |
Item Weight | 90.7 g |
Country of origin | Japan |

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Toto THU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks, Red (1 Pack)
Purchase options and add-ons
Material | Plastic |
Brand | Toto |
Item dimensions L x W x H | 12.1 x 8.9 x 6.4 Centimetres |
Exterior finish | Chrome |
Inlet connection size | 2 inches |
Inlet connection type | Rubber Flapper |
Outlet connection type | Standard 3-inch Connection |
Number of ports | 1 |
Outlet connection size | 3 inches |
Valve type | Flush Valve |
About this item
- Replacement flapper: designed for use on a selection of TOTO 3 inch flush valve tanks
- Replaces the following TOTO flapper part numbers: THU138S, THU175S, THU331S, THU140S, THU299S, THU253S, THU277S, THU347S, THU275S, THU332S, THU369S, and THU499S
- 3 inch sealing surface
Frequently bought together

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Product information
Technical Details
Additional Information
ASIN | B076KL3K87 |
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Customer Reviews |
4.6 out of 5 stars |
鶹 Rank |
|
Date First Available | Nov. 17 2017 |
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Product description
At TOTO, we design simple, brilliant, and elegant solutions for basic human needs where every innovation and detail is designed with you in mind. We’re committed to improving people’s lives and for over a century, we’ve made products that do just that. Add functionally and control to your everyday routine with the TOTO Vivian Cross Handle Three-way Diverter Trim. This traditionally styled accessory paired with the TSMXW three-way diverter valve is used as flow control for shower systems with two outlets and allows water flow to both outlets separately or at the same time. The double handles allow for better grip and more control over water volume and temperature to create the optimal experience. This long lasting and durable accent is made of solid brass construction and finished with corrosion-resistant chrome plating. Coordinates effortlessly with the entire TOTO Vivian Collection. TOTO creates a clean, relaxed, and refreshing lifestyle by designing for every part of the bathroom and striving to bring more to every moment you spend there. Required Valve TSMXW sold separately.
Safety and product resources
Safety documents
Top Brand: Toto
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This Item TotoTHU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks, Red (1 Pack) | Recommendations | |||
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Price | $36.08$36.08 | $22.99$22.99 | $34.98$34.98 | $88.36$88.36 |
Delivery | Get it by Thursday, Aug 7 | Get it by Wednesday, Jul 30 | Get it by Wednesday, Jul 30 | — |
Customer ratings | ||||
Sold by | 鶹.ca | Express Health Supply | Hibbent-CA | CM Products LLC |
material | Plastic | Rubber | Rubber | Rubber |
inlet size | 2 | 2 | 2 | 1.25 |
inlet type | Rubber Flapper | Barb | Fixed | Compression |
outlet type | Standard 3-inch Connection | Overflow Tube | Compression | G Connector |
outlet size | 3 | 2 | 3 | 1.25 |
number of ports | 1 | 0 | 1 | 2 |
exterior finish | Chrome | — | Stainless Steel | — |
Brands in this category on 鶹
Customer reviews
Customers say
Customers like the functionality, installation, and fit of the valve. They mention it works flawlessly, fits perfectly, and is of good quality. Some also say it's a genuine Toto product. However, some customers have issues with the flapper and have mixed opinions on leakage.
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Customers are satisfied with the functionality of the valve. They mention it works like a charm, does what is required, and fixes the problem immediately.
"Works great & cheaper than at local plumbing store!" Read more
"Very easy to install and works great. Would definitely buy again." Read more
"Fit great and works perfectly." Read more
"...It worked perfectly." Read more
Customers find the installation of the valve easy. They mention it came with easy instructions and resolved the problem. They also say the removal and installation of the new flapper took less than 4 minutes.
"Easy to install, just take out the old one and install the new. Make sure that you get the correct size...." Read more
"Toto quality, easy to install, works flawlessly." Read more
"Very easy to install and works great. Would definitely buy again." Read more
"Easy install / fixed running toilet. What more can I ask." Read more
Customers are satisfied with the fit of the valve. They mention it fits perfectly and is the exact fit for the Toto double cyclone toilet bowl.
"Fits perfectly and works like a charm! Only if the price could be a bit cheaper." Read more
"Exact fit for Toto Double cyclone toilet bowl. The slow leak is gone." Read more
"Fit perfect" Read more
"Fits perfect" Read more
Customers are satisfied with the quality of the valve. They mention it's an original Toto part and works flawlessly.
"Good product, easy to install" Read more
"A great product in that it is adaptable to dozens of Toto models...." Read more
"Better than original..." Read more
"Toto quality, easy to install, works flawlessly." Read more
Customers are satisfied with the valve. They mention it's a perfect replacement for the old flapper that's worn out and almost a universal replacement for TOTO tanks.
"Good replacement, good price and delivered on time." Read more
"Great replacement part for my toto toilet. Easy to install." Read more
"This was a perfect replacement for the old flapper that's worn out...." Read more
"Excellent replacement product" Read more
Customers have mixed opinions about the leakage of the valve. Some mention it doesn't leak, seals well, and is easy to install. However, others say the flapper allows water to seep through, causing waste of clean water.
"...Turns out the flapper was chipped, so water was going down and the toilet will keep wanting to add more water back in...." Read more
"...Seals well, and is still holding up after installed a few weeks ago." Read more
"The Toto flapper allows water to seep through, leaks, causing waste of clean water" Read more
"...Turns out it was a leaky flapper valve that was real cause of my trouble...." Read more
Customers are dissatisfied with the flapper of the valve. They mention it doesn't stay open for a full flush and the refill valve would do it's job.
"...As the water leaked slowly from the tank past the faulty flapper, the refill valve would do it's job and bring the water level back up, but because..." Read more
"...The flapper did not stay open for a full flush...." Read more
"...The old flapper wouldn't shut properly during some flushes and would let water trickle into the bowl...." Read more
Reviews with images

Fits great
Top reviews from Canada
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- Reviewed in Canada on March 21, 2024Verified PurchaseThis flapper replacement works perfectly, but it isn't a 'plug and play' replacement; it has to be dialed in to match your toilet:
First, DO NOT destroy or dispose of the cardboard backing sheet that this replacement flapper comes with - it has important adjustment information on the back you'll need to make this flapper work with your particular toilet.
You'll find the model number of your toilet printed inside of your toilet tank. You need to find your model number on the back of that cardboard backing sheet and adjust the flapper according to their instructions. It isn't difficult, but the job would be infinitely more difficult without following their instructions .
My toilet still didn't flush as well as it did with the older flapper. Removing one more link from the chain fixed my problem entirely, now it's good as new.
Don't let any of this stand in the way of your purchase - it works great once dialed in.
- Reviewed in Canada on October 8, 2020Verified PurchaseI just did my usual inspection of the flapper and found the flat area to seal the drain was curved upwards but still keeping a seal, for now. I have a Toto Drake 2-piece and an eco-max one-piece toilet. After learning that this replacement is suitable for both my toilets which do take different model flappers, I ordered two. As this is a replacement for several of the Toto flappers, there are settings and instruction on the packaging for your specific model. For my Drake ST743S model toilet, the instructions and chain link number was correctly stated in the package. For my eco-max CST604CEF toilet the instruction stated to have 16 links but I had way too much slack and it actually took only 12 links still with 1/2 a link slack for a good seal. The hook on my previous chain was a bit wider and shorter than the new one supplied but the longer length still did not account for the length of 4 links. DO NOT go with the listed number of links required and cut any extra links off until you test fit it first. Seems to be a great product/replacement for the original flappers in my Toto toilets. Removing and installing the new flapper took less than 4 minutes.
I just did my usual inspection of the flapper and found the flat area to seal the drain was curved upwards but still keeping a seal, for now. I have a Toto Drake 2-piece and an eco-max one-piece toilet. After learning that this replacement is suitable for both my toilets which do take different model flappers, I ordered two. As this is a replacement for several of the Toto flappers, there are settings and instruction on the packaging for your specific model. For my Drake ST743S model toilet, the instructions and chain link number was correctly stated in the package. For my eco-max CST604CEF toilet the instruction stated to have 16 links but I had way too much slack and it actually took only 12 links still with 1/2 a link slack for a good seal. The hook on my previous chain was a bit wider and shorter than the new one supplied but the longer length still did not account for the length of 4 links. DO NOT go with the listed number of links required and cut any extra links off until you test fit it first. Seems to be a great product/replacement for the original flappers in my Toto toilets. Removing and installing the new flapper took less than 4 minutes.
Images in this review
- Reviewed in Canada on September 2, 2024Verified PurchaseFit perfectly for our st784s
- Reviewed in Canada on August 15, 2020Verified PurchaseInstalled relatively easily. Old model was all grey that came with the toilet and lasted about 7 years.
Toto suggested for the Drake II 1.28gpf an arrow setting of 1, chain length of 17 and lever setting of 2. But when I used those settings it seems like the chain was too far from the lever and the chain was too long.
So I changed the settings to Arrow 1, chain length 10/13 and lever setting 3. Toilet works well now. Chain length could probably be a little longer but not mucking with it any further!
Oh and I ended up cutting some of the excess chain length as it was sometimes getting caught under the flapper. Make sure there that doesn’t happen or you will get a leak.
- Reviewed in Canada on August 30, 2024Verified PurchaseI couldn't find a flapper for my Toyo toilet locally. I'm so glad to have found one on 鶹! It works perfectly on my model - ST794S.
- Reviewed in Canada on August 16, 2024Verified PurchaseToto quality, easy to install, works flawlessly.
- Reviewed in Canada on July 7, 2024Verified PurchaseGood product, easy to install
- Reviewed in Canada on July 17, 2024Verified PurchaseWorks for ToTo
Top reviews from other countries
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Guillermina OrozcoReviewed in Mexico on September 3, 2021
5.0 out of 5 stars Funciono perfectamente!!!
Verified PurchasePara el tanque de mi baño Toto
- MarcReviewed in the United States on May 20, 2024
5.0 out of 5 stars Easy to install and it operates perfectly
Verified PurchaseI followed the directions on the packet and this flapper fits and operates perfectly. I have a one-piece Toto elongated toilet and by following the setup instructions exactly (chain links and dial number) it works great. Probably took 5 minutes.
I believe that for several years the OEM Toto flapper was not available so I bought non Toto part the last time I replaced the flapper. It was nice to discover that 鶹 now carries the Toto brand part.
While the product is great the delivery was not. 鶹 has a problem with small packages such as this scheduled for delivery on a Sunday. With Prime they promised the Sunday delivery but the handoff to the USPS creates issues when USPS fails. USPS has a contract to make Sunday deliveries but twice in the last month the local USPS personnel were MIA and delivery failed. Lesson: depending you your local USPS, be aware when the 鶹 item is scheduled for delivery. DO NOT order if the day falls on a Sunday. The item could end up in nowhere land for several days.
Note: I paid full price for this item and received no compensation of any kind to write this review. I honor the review system and abhor any attempts to game the system.
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josefina limon de villalbaReviewed in Mexico on October 17, 2018
5.0 out of 5 stars En 鶹 encuentras todo
Verified PurchaseLo adecuado a mi wc y lo fácil de conseguir en amazon
- a long way from homeReviewed in the United States on January 12, 2020
5.0 out of 5 stars Works like a charm
Verified PurchaseI hate it when a toilet decides to stop doing it job. It's not like I keep spare parts in the house just in case. Perhaps I should but in all these years it has never occurred to me to do that. And they never seem to stop working at, say, 2 o'clock on a tuesday when any local hardware store would be open and welcoming to you with their sage toilet repair advice. No, it always seems to happen after five on a weekend day. Such was the case when our Toto toilet flapper thingy broke free from the chain connected to the flash handle lever thingy. With no stores but a faraway home imorovement superstore open, I turned as I often do, to my friend amazon to see what flapper thingies I might find. And lookie what I found.... a kind of UNIVERSAL toto flapper thingy. I bought it and spent 2 days hand flushing the toilet until it arrived.
It looked complicated and I began to break out into a cold sweat, cursing myself for buying this universal flapper when a specific flapper would be a more straightforward install. But I proceeded in spite of my mounting panic and I actually read the very few directions that came with it (there is also a video for those who might panic more than I did). Within five minutes I had a perfectly flushing toilet. This could not have been any easier and the very nice toto toilet people really covered everything thoroughly in very few words. I've been happily flushing away for the past week. I am now thinking that perhaps I SHOULD purchase another toto flapper thingy just to have a spare on hand. Surely if I purchase it now it will be less expensive than if I wait to purchase it when the current one fails in three or four years. It's something to consider
BOTTOM LINE: Don't be afraid the way I was . This thing is a cinch to install and took only a few minutes. The directions look complicated but if you actually spend the 40 seconds it takes to read them you'll see how absolutely simple it is. HIGHLY RECOMMEND
- Bradley KReviewed in the United States on July 4, 2024
5.0 out of 5 stars Easy to install
Verified PurchaseA local plumber decided to replace the original Toto flapper with a generic item. Worked fine, but started deteriorating after a couple years so gave this a try. Great solution. Easy to install - it adjusts to fit nearly every Toto toilet made and looks really well made. Also restored the dual flush (high/low) option that the Toto had originally that didn't work with the generic item.