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FLUSH VALVE ASSEMBLY
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- flush valve
- Parts and Accessories Type:
- Flush Valve
- Department:
- Plumbing
- Application:
- Toilet
TOTO THU791-A – Frequently Asked Questions
1) What exactly is the TOTO THU791-A?
THU791-A is a TOTO flush valve assembly, the toilet tank component that releases water from the tank into the bowl when the trip lever is actuated. It is a repair/replacement part, not a complete toilet or tank kit, so you order it by that TOTO part number when the valve in an existing TOTO tank is leaking past the seal or no longer sealing after a flush.
2) How do I know whether I need a flush valve or a fill valve for my TOTO toilet?
The two do opposite jobs. A flush valve such as the TOTO THU791-A sits at the bottom of the tank and lets the stored water out into the bowl on a flush; a fill valve sits on the supply side and refills the tank afterward. If water trickles continuously from the tank into the bowl, or the bowl never gets a full flush volume, the flush valve or its seal is the part at fault. If the tank refuses to refill, overfills, or runs to the overflow, that is a fill valve problem and this part will not fix it.
3) For a property manager stocking TOTO repair parts, is the flush valve assembly worth keeping on the shelf?
It is one of the two wear items in a TOTO tank, along with the fill valve, so facilities running numbers of the same TOTO model commonly stock both. The seal face on a flush valve is the part that hardens and weeps over time, and a weeping flush valve is the usual cause of a toilet that runs intermittently. Stock THU791-A against the specific tank models in your building, since TOTO valves are not interchangeable across the whole range.
4) Is the THU791-A a single part number or are there finish options to pick?
One configuration only. THU791-A is ordered as a single flush valve assembly with no finish, size, or handing choices to specify, which is typical for an in-tank component that is never seen once the lid is on.
How fast can I get the TOTO THU791-A delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the TOTO THU791-A come with a warranty?
Absolutely. The TOTO THU791-A is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the TOTO THU791-A?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the TOTO THU791-A from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.