--- product_id: 56622804 title: "Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S" brand: "toto" price: "373 kr" currency: DKK in_stock: true reviews_count: 10 category: "Toto" url: https://www.desertcart.dk/products/56622804-replacement-flapper-for-select-toto-3-inch-flush-valve-tanks store_origin: DK region: Denmark --- # quick 5-min install durable polypropylene & rubber 3-inch universal fit Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S **Brand:** toto **Price:** 373 kr **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your flush game with TOTO’s flawless fit! ## Quick Answers - **What is this?** Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S by toto - **How much does it cost?** 373 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/56622804-replacement-flapper-for-select-toto-3-inch-flush-valve-tanks) ## Best For - toto enthusiasts ## Why This Product - Trusted toto brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Complete Setup Kit:** Includes chain and detailed instructions tailored for your TOTO tank model—no guesswork required. - • **OEM Quality Assurance:** Genuine TOTO replacement part compatible with multiple flapper models for trusted reliability. - • **Precision 3-Inch Seal:** Engineered for a perfect fit on select TOTO flush valve tanks, ensuring leak-free performance. - • **Effortless Installation:** No handyman skills needed—get your toilet running smoothly in under 5 minutes. - • **Eco-Friendly Water Control:** Optimized sealing reduces water waste, helping you save on utility bills and support sustainability. ## Overview The TOTO Replacement Flapper THU500S is a high-quality, 3-inch toilet flapper designed to fit a wide range of TOTO flush valve tanks. Made from durable polypropylene with a rubber sealing surface, it ensures a reliable, leak-free flush while reducing water waste. Easy to install in minutes, this genuine OEM part replaces multiple TOTO flapper models and comes with a chain and setup instructions for a hassle-free upgrade. ## Description The TOTO Replacement Flapper is designed for use on a selection of TOTO 3 inch flush valve tanks. Adjustable for various tanks, replacing flapper part numbers THU138S, THU175S, THU331S, THU140S, THU299S, THU253S, THU277S, THU347S, THU275S, THU332S, THU369S, and THU499S. Polypropylene body with rubber sealing surface. Flapper includes chain along with instructions for set-up specific to TOTO tank model. Review: Easy to install - Easy to install. I'm no handyman and I did it in a few minutes. Works as it should. Review: Easy to install and it operates perfectly - I 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 desertcart now carries the Toto brand part. While the product is great the delivery was not. desertcart 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 desertcart 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. ## Features - Plastic - Imported - Size: 3 Inch.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 - Water consumption: 0.0 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B076KL3K87 | | Best Sellers Rank | #7,317 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Toilet Flappers | | Brand Name | TOTO | | Customer Reviews | 4.6 4.6 out of 5 stars (3,280) | | Exterior Finish | Plastic | | Global Trade Identification Number | 00739268326958 | | Included Components | flapper | | Inlet Connection Size | 3 Inches | | Inlet Connection Type | Rubber Flapper | | Item Dimensions | 4.75 x 3.5 x 2.5 inches | | Item Type Name | Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks | | Item Weight | 0.2 Pounds | | Manufacturer | TOTO | | Manufacturer Warranty Description | Manufacturer One Year Limited | | Material Type | Plastic | | Model Number | THU500S | | Number of Pieces | 1 | | Number of Ports | 1 | | Outlet Connection Size | 3 Inches | | Outlet Connection Type | Standard 3-inch Connection | | Size | 3 Inch (Pack of 1) | | Thread Size | 3 inches | | Thread Type | Plastic | | UPC | 739268326958 | | Unit Count | 1.0 Count | | Valve Type | Toilet Flapper Valve | ## Product Details - **Brand:** TOTO - **Exterior Finish:** Plastic - **Global Trade Identification Number:** 00739268326958 - **Inlet Connection Size:** 3 Inches - **Inlet Connection Type:** Rubber Flapper - **Item dimensions L x W x H:** 4.75 x 3.5 x 2.5 inches - **Material:** Plastic - **Number of Ports:** 1 - **Outlet Connection Size:** 3 Inches - **Outlet Connection Type:** Standard 3-inch Connection ## Images ![Replacement Flapper for Select TOTO 3 Inch Flush Valve Tanks - THU500S - Image 1](https://m.media-amazon.com/images/I/719eMJsjEAL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Will this work with a ST784S?** A: The ST784S calls for part number THU331S flapper. This one should be a replacement for that, so it should work. **Q: My old flapper does not clip on or off nor will it slide off the pins. The material is not pliable. How do i get it off?** A: Hello, I'm sorry to hear you are having trouble removing your current flapper. I am not sure what type of flapper or toilet you currently have and do not want to suggest something that may not work or damage your current toilet. I would suggest reaching out to our TOTO Tech Support directly so they can troubleshoot the issue and walk through some options. They can be reached at techsupport@toto.com or call 1-888-295-8134 between 8am - 8pm Mon - Fri EST and press 4 when prompted. We also have live chat on the TOTO USA website. I hope this helps and thank you for choosing TOTO. **Q: Does this fit the ST454E?** A: Per Toto's parts schematic for their model CST454CEF and CST454CEFG, this is the exact replacement flapper. Toto places a parts list on the inside bottom surface of their tank lids. Check for this list, and even if the part number is different you can do an online search with that number and it will bring up the current replacement part number, as Toto has continued to update their products. My Toto's list provided a flapper number that had been updated when I needed to buy one, and the new flapper replaces a good number of their older flappers. It fit and works perfectly in my Toto. Verify that your toilet is a "CST454CEF or CST454CEFG" and then you can download the current parts schematic for it from the Toto web site. Install is fast and easy, and Amazon got the part out to me very quickly. Good luck! **Q: Does this fit cst853? it looks so much difference than the original flapper.** A: Hello, Yes. This is an updated version of the TOTO replacement flapper that can be adjusted to many models. There will be instructions on how to adjust it to your model. I hope this is helpful and thank you for your interest in TOTO! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to install *by 1***Y on February 19, 2026* Easy to install. I'm no handyman and I did it in a few minutes. Works as it should. ### ⭐⭐⭐⭐⭐ Easy to install and it operates perfectly *by M***C on May 20, 2024* I 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 Amazon now carries the Toto brand part. While the product is great the delivery was not. Amazon 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 Amazon 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. ### ⭐⭐⭐⭐⭐ Perfect for TOTO toilets *by A***R on December 22, 2025* The fit, quality and seal was perfect. ## Frequently Bought Together - TOTO THU500S Replacement Flapper for Select 3 Inch Flush Valve Tanks, Red (1 Pack) - TOTO TSU99A.XR Fill Valve, Blue - TOTO Toilet Handle Replacement Parts Kit, Universal TOTO THU068#CP Trip Lvr for St743S Side Mount Toilet Flush Tank Lever Handle for TOTO Kohler Toilet Tank, 1-Pack Copper Lever --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.dk/products/56622804-replacement-flapper-for-select-toto-3-inch-flush-valve-tanks](https://www.desertcart.dk/products/56622804-replacement-flapper-for-select-toto-3-inch-flush-valve-tanks) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-24*