--- product_id: 217759070 title: "2\" One Piece Toilet Flush Valve" brand: "vallvater" price: "฿3933" currency: THB in_stock: true reviews_count: 8 category: "Vallvater" url: https://www.desertcart.co.th/products/217759070-2-one-piece-toilet-flush-valve store_origin: TH region: Thailand --- # dual flush water-saving tech install in under 10 minutes 2" universal flush valve size 2" One Piece Toilet Flush Valve **Brand:** vallvater **Price:** ฿3933 **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your flush game—save water, time, and hassle! ## Quick Answers - **What is this?** 2" One Piece Toilet Flush Valve by vallvater - **How much does it cost?** ฿3933 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/217759070-2-one-piece-toilet-flush-valve) ## Best For - vallvater enthusiasts ## Why This Product - Trusted vallvater brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual Flush Water-Saving Design:** Adjustable flush for eco-friendly water use without leaks. - • **Quick & Effortless Installation:** Get your toilet flushing like new in under 10 minutes—no plumber needed. - • **Durable ABS & Stainless Steel Build:** Engineered for long-lasting performance and leak-proof sealing. - • **Universal 2" Flush Valve Compatibility:** Fits most 2.56"-2.76" toilet tank holes for seamless upgrades. - • **Perfect Fit for Water Ridge & TOTO Models:** Reliable replacement for THU338 and similar one-piece toilets. ## Overview This 2" Toilet Flush Valve Assembly by VALLVATER is a durable, universal replacement part designed for most one-piece toilets with 2.56"-2.76" tank holes. Featuring a dual flush water-saving mechanism and quick installation under 10 minutes, it ensures leak-proof performance and eco-friendly operation. Compatible with Water Ridge and TOTO THU338 models, it’s the smart, hassle-free fix to restore your toilet’s efficiency and reliability. ## Description 2" Toilet Flush Valves Assembly Compatible with Water Ridge 1-Piece Toilets | Replacement THU338 Dual Flush Drain Valve Repair Part for Toto Aquia Toilet One Piece Model - #MS654204MF or #MS654114MF - desertcart.com Review: We have a Toto toilet that was leaking - We have a Toto toilet that was leaking. This fit perfectly and fixed the problem. Seal was tight, easy to install for a novice. Seems to be as durable as the original old one. Review: Excellent replacement - I built my own house and put in 3 Toto Aquia one piece toilets and 1 Toto Aquia two piece toilet. They look great, but I’ve been really disappointed in how they function right from the beginning. They have been prone to leaking and running constantly and just a huge disappointment considering how much I paid for them. I called Toto to complain about 2 of the 4 toilets, and they sent me free of charge, 2 new original TOTO THU338N, as replacements. They worked and resolved the leaking problem. It’s been almost 10 years, but a few months ago, that same leaking problem started, so I tried replacing the rubber gaskets and parts but nothing seemed to work so I bought this off brand product and replaced the whole assembly with it. It fits and works like the original Yes you can try replacing the gasket and other rubber parts that wear out over time that cost $10+ when you include the shipping, but for $25 for the whole assembly, with all the rubber parts, it’s really the better way to go. Save yourself the hassle and just buy and replace the whole assembly from the beginning. I’m going to buy a couple more just to have, who knows what they will cost in the future. ## Features - ✔UNIVERSAL DESIGN: Flush valve repair kit suitable for most 2-Inch one piece with top push buttom toilet. - ✔MEASURE TWO SIZE: This item is only applicable to 2.56"-2.76"(65mm-70mm)(about the size of a baseball) Toilet tank hole Diameter,and it cannot be used if it exceed this size.Measure the Tank Height: Height Should be 10"- 14" (25.5 cm-36 cm). Please measure the size including ceramic cover for water tank, otherwise , it won't fit. - ✔DUAL FLUSH WATER-SAVING TYPE: for all drainage you can adjust water in the water tank; for half drainage, you can use the water in the water tank to adjust the silicone seal, it with good sealing effect, will not have leaking. - ✔QUICK AND EASY INSTALLATION: Our toilet drain valve is suitable for most one piece toilets.(not including flapper valve) easy to install in 10 minutes or less, and saves time and effort,get your toilet flushing like new again. - ⚠NOTES: Please check the size in the main image before buying. Fit For TOTO THU338 flush valve,can works great with the old part THU338 and most 2 inch one pieces toilet. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B088LNZNP7 | | Best Sellers Rank | #59,572 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #86 in Toilet Flush Valves | | Brand | VALLVATER | | Brand Name | VALLVATER | | Connector Type | Butt Weld | | Customer Reviews | 4.4 out of 5 stars 275 Reviews | | Exterior Finish | Silicone | | Included Components | 1 x install guide, 1 x toilet flush valve | | Inlet Connection Size | 2.56 inches | | Inlet Connection Type | Butt Weld | | Item Dimensions | 8 x 3 x 8 inches | | Item dimensions L x W x H | 8 x 3 x 8 inches | | Manufacturer | VALLVATER | | Manufacturer Part Number | THU | | Material | ABS , Stainless Steel | | Material Type | ABS, Stainless Steel | | Model Number | THU | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Number of Ports | 2 | | Outlet Connection Size | 2 inches | | Outlet Connection Type | Butt Weld | | Set Name | Toilet Flush Valve Set | | Size | 8 inch height | | Specification Met | UPC, WRAS | | Thread Size | 2.56 inches | | UPC | 725766901162 | | Unit Count | 1 Count | | Valve Type | flush valve | ## Product Details - **Brand:** VALLVATER - **Exterior Finish:** Silicone - **Inlet Connection Size:** 2.56 Inches - **Inlet Connection Type:** Butt Weld - **Item dimensions L x W x H:** 8 x 3 x 8 inches - **Material:** Acrylonitrile Butadiene Styrene (ABS), Stainless Steel - **Number of Ports:** 2 - **Outlet Connection Size:** 2 Inches - **Outlet Connection Type:** Butt Weld - **Specification Met:** UPC, WRAS ## Images ![2" One Piece Toilet Flush Valve - Image 1](https://m.media-amazon.com/images/I/51SaIFxmfOL.jpg) ## Questions & Answers **Q: Sorry quick correction the valve number for my toilet is dv-f812v21 ?** A: Sorry, we can't see your original part, but if your toilet is one piece with top button,the tank height would be 10"-12.8",the tank hole in 2.56"-2.95". it can be used. **Q: Will yhis item work on horow 8737?** A: Don't buy this component, because while it will work, you're not going to like the results. My toilet ran like a whisper before--then I used this replacement valve kit and the toilet works--REALLY LOUD. It wakes people up in the other room (the bathroom is connected to the master bedroom). Get a better version from someplace else like Lowes or Home Despot. **Q: Will this work on my Costco WaterRidge-c22148c toilet?** A: No. This is not the correct piece. **Q: How do you secure the valve to the screw** A: The top half of the flush valve twists off exposing the screw and metal piece that will hold the valve down. Loosen the screw allowing you to fit the bracket into the water drain and then tighten up the screw which will tighten up the flush valve. Then twist and lock the the rest back. ## Customer Reviews ### ⭐⭐⭐⭐⭐ We have a Toto toilet that was leaking *by A***N on October 28, 2025* We have a Toto toilet that was leaking. This fit perfectly and fixed the problem. Seal was tight, easy to install for a novice. Seems to be as durable as the original old one. ### ⭐⭐⭐⭐⭐ Excellent replacement *by H***Y on May 4, 2024* I built my own house and put in 3 Toto Aquia one piece toilets and 1 Toto Aquia two piece toilet. They look great, but I’ve been really disappointed in how they function right from the beginning. They have been prone to leaking and running constantly and just a huge disappointment considering how much I paid for them. I called Toto to complain about 2 of the 4 toilets, and they sent me free of charge, 2 new original TOTO THU338N, as replacements. They worked and resolved the leaking problem. It’s been almost 10 years, but a few months ago, that same leaking problem started, so I tried replacing the rubber gaskets and parts but nothing seemed to work so I bought this off brand product and replaced the whole assembly with it. It fits and works like the original Yes you can try replacing the gasket and other rubber parts that wear out over time that cost $10+ when you include the shipping, but for $25 for the whole assembly, with all the rubber parts, it’s really the better way to go. Save yourself the hassle and just buy and replace the whole assembly from the beginning. I’m going to buy a couple more just to have, who knows what they will cost in the future. ### ⭐⭐⭐⭐⭐ Replaces Toto dual flush perfectly. *by R***E on August 3, 2022* At first, I thought this unit wouldn’t work on my Toto one piece dual flush. It seemed to be made for a lid where the flush buttons were stacked front to back. I needed side by side. But upon further inspection I realized the top part of the unit can be locked down by rotating it in either direction. One does side by side, the other way does front to back. Works like a charm. Easy install. ## Frequently Bought Together - Toilet Flush Valves 2-Inch Replacement Valve Kit Assembly for One Piece Dual Flush Drain Valve Repair Compatible with TOTO THU338N - Teaayako Toilet Push Button 38mm Thread Diameter Dual Push Flushing Button Adjustable Toilet Water Tank Button,Black - Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor --- ## 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.co.th/products/217759070-2-one-piece-toilet-flush-valve](https://www.desertcart.co.th/products/217759070-2-one-piece-toilet-flush-valve) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-08-28*