---
product_id: 297598965
title: "Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks"
brand: "toto"
price: "A$136"
currency: AUD
in_stock: true
reviews_count: 1
category: "Toto"
url: https://www.desertcart.com.au/products/297598965-toto-tsu99a-x-adjustable-replacement-fill-valve-assembly-for-toilet
store_origin: AU
region: Australia
---

# Optimizes refill volume for peak performance Adjustable height fits all TOTO tanks DIY-friendly easy installation Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks

**Brand:** toto
**Price:** A$136
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your throne with precision and ease—because your bathroom deserves the best!

## Quick Answers

- **What is this?** Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks by toto
- **How much does it cost?** A$136 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/297598965-toto-tsu99a-x-adjustable-replacement-fill-valve-assembly-for-toilet)

## 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

- • **Effortless Upgrade:** Simple DIY installation means no plumber needed—save time and money instantly.
- • **Complete Replacement Kit:** Includes valve, refill tube, clamp, cone washer, and nut—everything you need in one box.
- • **Precision Performance Reset:** Restores your toilet’s optimal refill speed and volume for efficient water use.
- • **Universal Fit, Zero Guesswork:** Adjustable height and flow rate tailor-fit for virtually every TOTO toilet tank model.
- • **Durable Build, Long-Term Reliability:** Crafted from premium brass and stainless steel for corrosion resistance and lasting quality.

## Overview

The TOTO TSU99A.X Adjustable Replacement Fill Valve Assembly is a premium, universal-fit valve designed to restore and optimize the performance of all current TOTO toilet tanks. Featuring adjustable height and refill volume, it ensures precise water flow tailored to your model. The kit includes all necessary components for a quick, DIY installation, crafted from durable brass and stainless steel for long-lasting reliability.

## Description

The TOTO Adjustable Replacement Fill Valve Assembly for Toilet Tanks is compatible for all current TOTO toilet models. The height and refill volume can be adjusted according to your toilet tank settings, bringing your toilet back to optimal performance. The fill valve has a standard 7/8 inch inlet connection. Includes valve, refilltube, and cone washer with nut. Genuine TOTO adjustable universal fill valve. The adjustable height and flow rate will accommodate most TOTO toilets. Replaces valve numbers: TSU16A, TSU17A, TSU18A, TSU24A, TSU25A, TSU26A, TSU28A, TSU29A, TSU33A, TSU34A, TSU38A, TSU30A, TSU08A.5, TSU36A.10, TSU08A.6R, TSU36A.6, TSU06A.4, TSU09A.8R. Fits tank models: ST743S(R)(B), ST707S, ST804S, ST784S, ST753S, ST423S, ST424S, ST774S, ST794S, ST754S, ST423E, ST424E, ST743E(R)(B), ST794E, ST784E, ST454E, ST753E, ST754E, ST755S, ST703, ST706(R), ST723, ST733, ST406, ST405M, ST413M, ST412M, ST416M, ST464M. Fits combination models: CST853S, CST854S(L)(G), CST874S(G), CST934SF, CST853, CST854, CST863, CST864, CST863E, CST864E, CST634CEF(G), CST644CEF(G), CST854E(L), CST853E, CST604CEF(G)(R), CST614CEF(G), CST624CEF(G), CST626CEF(G), CST934EF, CST964CEF(G), CST974CEF(G), CST904, CST654MF.

Review: Good product - Was very happy that it fitted perfectly into our 20 year old Toto flush tank

## Features

- Adjustable height for all TOTO toilet tanks
- Resets your tank back to optimal performance
- Includes valve, refill tube and clamp, cone washer and nut
- Standard 7/8 inch inlet connection
- Easy, DIY installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0097CVGWI |
| Best Sellers Rank | #96,141 in Home Improvement ( See Top 100 in Home Improvement ) #213 in Flush Valves |
| Brand | TOTO |
| Brand Name | TOTO |
| Country of Publication | USA |
| Customer Reviews | 4.5 out of 5 stars 3,511 Reviews |
| Global Trade Identification Number | 00739268224278 |
| Inlet Connection Size | 0.87 Inches |
| Inlet Connection Type | Threaded |
| Item Dimensions | 26 x 10.2 x 5.7 Centimeters |
| Item Weight | 5.3 Ounces |
| Item dimensions L x W x H | 26 x 10.2 x 5.7 Centimeters |
| Manufacturer | TOTO |
| Manufacturer Warranty Description | Contact seller of record |
| Material | Brass , Stainless Steel |
| Material Type | Brass, Stainless Steel |
| Model Number | TSU99A.X |
| Number of Ports | 1 |
| Outlet Connection Size | 0.75 Inches |
| Outlet Connection Type | G Connector |
| Size | Small |
| Specification Met | ANSI B16.11 |
| UPC | 739268224278 |
| Unit Count | 1.0 Count |
| Valve Type | Globe Valve |

## Product Details

- **Material:** Stainless Steel, Brass
- **Brand:** Toto
- **Item dimensions L x W x H:** 26 x 10.2 x 5.7 Centimeters
- **Inlet Connection Size:** 0.87 Inches
- **Inlet Connection Type:** Threaded
- **Outlet Connection Type:** G Connector
- **Number of Ports:** 1
- **Outlet Connection Size:** 0.75 Inches
- **Specification Met:** ANSI B16.11
- **Valve Type:** Globe Valve

## Images

![Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks - Image 1](https://m.media-amazon.com/images/I/51mk1pa6axL.jpg)
![Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks - Image 2](https://m.media-amazon.com/images/I/61zvQeYdhXL.jpg)
![Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks - Image 3](https://m.media-amazon.com/images/I/711scbpdBpL.jpg)
![Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks - Image 4](https://m.media-amazon.com/images/I/61xoF1WT+JL.jpg)
![Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks - Image 5](https://m.media-amazon.com/images/I/71nTsSjURWL.jpg)

## Questions & Answers

**Q: does this fit the st743s toilet?**
A: Original part number should be TSU08A.6 http://foundmypart.com/index.php?categoryID=568&category_slug=toto-st743sSearch in totostore.us.com, TSU08A.6 replaced by TSU16A.  TSU16A discontinuous and replaced by TSU99A.XTSU99A.X show Fits tank models: ST743S(R)(B) in the product description on Amazon also.http://www.amazon.com/TOTO-TSU99A-X-Universal-Fill-Valve/dp/B0097CVGWII will say it's a safe bet.  Just note that you MUST adjust the value based on the instruction.  I saw many review seems the users just hope for plug and play.This is UNIVERSAL fit means it will need adjustment to fit different models.Good Luck!

**Q: We have a one piece Toto toilet. The Amazon description has this fitting a two piece. Has anyone used this part in a one piece?**
A: In the specifications for this valve, it is stated that the valve replaces s TSU18A Toto fill valve.  A TSU18A is designed for a TOTO one piece toilet, either a GMAX or a Power Gravity.  I used this valve for a 743S Toto toilet without a problem and it was an one piece toilet.

**Q: This looks like a repackaged Korky 528T or 528MP.  Any reason to spend $15 more for this one instead of the Korky?  Just askin.**
A: I think the Korky PRO version (528PRO) beats them both. It seems to be better built than the 528MP or the original equipment Toto branded version made by Korky. Plus, it includes a gauge and chart for setting the water level in the bowl; which are not included with the 528MP. The PRO costs more than the MP, but less than the Korky T or GT models, and much less than the Toto branded model.

**Q: is this the same as the THU9021?**
A: No. THU9021 is a junction valve. This is a fill valve (universal) for inside of the tank. The TSU99A.X was a perfect replacement for the OEM TSU18A fill valve that started leaking after 26 months.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by A***R on 19 December 2024*

Was very happy that it fitted perfectly into our 20 year old Toto flush tank

## Frequently Bought Together

- Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks
- Teaayako Toilet Flush Valves 2-Inch Dual Flush Valve Replacement kit for 2-Piece toilet tank Compatible with TOTO THU435 THU224 flush valve

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-10*