does this fit the st743s toilet?

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!

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?

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.

This looks like a repackaged Korky 528T or 528MP. Any reason to spend $15 more for this one instead of the Korky? Just askin.

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.

is this the same as the THU9021?

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.

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Toto TSU99A.X Adjustable Replacement Fill Valve Assembly for Toilet Tanks

Product ID: 297598965

Details

Material
Stainless
Brand
Toto
Item dimensions L x W x H
26 x 10.2 x
Inlet Connection Size
0.87 Inches
Inlet Connection Type
Threaded
Outlet Connection Type
G Connector

💧Optimizes refill volume for peak performance

📏Adjustable height fits all TOTO tanks

🔧DIY-friendly easy installation

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Description

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

DIY CONFIDENCE - Lightweight and straightforward installation means no plumber needed—upgrade your bathroom on your schedule.
EFFORTLESS UPGRADE - Includes valve, refill tube, clamp, cone washer, and nut for a seamless, all-in-one replacement experience.
RESTORE OPTIMIZE - Resets your toilet tank to factory-level performance, saving water and preventing costly leaks.
PRECISION ENGINEERING - Standard 7/8 inch threaded inlet connection ensures a secure, leak-free fit every time.
UNIVERSAL FIT ZERO GUESSWORK - Adjustable height and flow rate tailored for all current TOTO toilet tanks—no more compatibility headaches.

The TOTO TSU99A.X Adjustable Replacement Fill Valve Assembly is a premium, universally compatible valve designed to restore and optimize the performance of all current TOTO toilet tanks. Featuring adjustable height and refill volume, it ensures a perfect fit and efficient water flow. The kit includes all necessary components for a quick, DIY installation with a standard 7/8 inch threaded inlet connection, crafted from durable brass and stainless steel for long-lasting reliability.

Specifications

ASIN	B0097CVGWI
Best Sellers Rank	#130,034 in Home Improvement ( See Top 100 in Home Improvement ) #283 in Flush Valves
Brand	TOTO
Brand Name	TOTO
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

Reviews

A**R

Good product

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

19.12.2024

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$153.19

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

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