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AQUIA 1-PC FLAPPER SEAL GASKET
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- aquia flapper seal
- Parts and Accessories Type:
- Flapper
- Department:
- Plumbing
- Application:
- Toilet
TOTO THU348 – Frequently Asked Questions
1) What is the TOTO THU348 part used for on an Aquia toilet?
THU348 is the flapper seal gasket for TOTO Aquia one-piece toilets. It sits in the tank as the rubber seal that closes off the flush valve between flushes, so it's the part to look at when a tank keeps running or trickles into the bowl.
2) My TOTO toilet tank keeps running. Is a flapper seal the right fix?
On a TOTO Aquia, a constantly running tank most often traces to the flapper seal failing to close on the flush valve, and THU348 is the replacement seal set for that model. Confirm your toilet is an Aquia before ordering, since TOTO uses different flush valve seals across its lines and they are not interchangeable.
3) Will the THU348 flapper seal fit a TOTO Drake or a two-piece TOTO toilet?
No. THU348 is specified for the Aquia one-piece, and TOTO's two-piece models such as the Drake use a different flush valve and seal. Match the replacement to your exact model rather than assuming TOTO tank parts cross over.
4) I ordered THU348 for my TOTO Aquia. Is it one piece or a set?
It ships as a set, covering both the large and small side pieces, under the single part number THU348. You order the one number and get the group, not individual seals.
5) Is THU348 a genuine TOTO part or an aftermarket flapper?
It's the TOTO factory part, carried under TOTO's own part number THU348. That matters on Aquia tanks because the dual-flush valve seats to a specific profile and generic universal flappers usually won't seal on it.
6) For a property with several TOTO Aquia toilets, is the flapper seal worth stocking?
Yes, it's the classic MRO consumable on these fixtures. The rubber seal is what wears first in a TOTO Aquia tank, and THU348 is the single part number that covers the seal set, so one SKU on the shelf handles every Aquia one-piece in the building.
7) Do I need tools or extra parts to install the TOTO THU348 flapper seal?
It's a tank-side swap with no plumbing connections involved: shut the supply, flush the tank down, lift out the old seal and drop the new one in. THU348 is supplied as the seal set itself, so anything else in the tank, fill valve, flush valve body, or tank-to-bowl gasket, is a separate part number.
How fast can I get the TOTO THU348 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 THU348 come with a warranty?
Absolutely. The TOTO THU348 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 THU348?
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
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