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TANK TO BOWL MOUNTING HARDWARE
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- tank to bowl
- Parts and Accessories Type:
- Toilet Tank
- Department:
- Plumbing
- Application:
- Toilet
TOTO THU778#03-A – Frequently Asked Questions
1) What is TOTO part THU778#03-A?
THU778#03-A is TOTO's tank-to-bowl mounting hardware, the bolt set that fastens a toilet tank down to the bowl. It is a toilet repair part, not a complete tank or bowl.
2) Will TOTO THU778#03-A fit any toilet, or only certain TOTO models?
TOTO tank-to-bowl hardware is sold by part number against specific tank and bowl combinations, and THU778#03-A is the kit that carries the #03 code. Match the part number to the kit called out for your tank model rather than assuming it fits any two-piece toilet. If the service parts list for your TOTO tank specifies THU778, this is that kit.
3) I have a leak between the tank and the bowl on a TOTO toilet. Is this the part I need?
If the water is weeping out at the bolt heads or the bolts have corroded, the tank-to-bowl hardware kit THU778#03-A is the right repair. If water is leaking from the flat gasket between tank and bowl rather than at the bolts, you need the tank-to-bowl gasket instead, which is a separate TOTO service part.
4) Does the TOTO THU778#03-A kit come with the tank-to-bowl gasket, or do I order that separately?
THU778#03-A covers the tank-to-bowl mounting hardware only. Plan on sourcing the tank-to-bowl gasket and any flush valve seal as separate TOTO service parts if you are rebuilding the joint completely.
5) Can I use a generic hardware store tank bolt kit instead of the TOTO part?
On TOTO two-piece toilets the bolt length, washer stack, and hole spacing are matched to the tank casting, so a universal kit often sits wrong and keeps weeping. Ordering the TOTO-specified kit, THU778#03-A, keeps the joint to the manufacturer's own geometry.
6) Is TOTO THU778#03-A a maintenance part worth stocking for a building with TOTO toilets?
For property managers and MRO buyers running TOTO two-piece fixtures, tank-to-bowl hardware is a common wear item, since the bolts corrode and the washers harden over time. Stocking THU778#03-A makes sense only where your tanks call out that part number; TOTO uses different hardware kits across its tank models.
How fast can I get the TOTO THU778#03-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 THU778#03-A come with a warranty?
Absolutely. The TOTO THU778#03-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 THU778#03-A?
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