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SEAL GASKET FOR DRAIN VALVE TO
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- seal gasket drain
- Parts and Accessories Type:
- Drain Assembly
- Department:
- Plumbing
- Application:
- Sink
TOTO THU370 – Frequently Asked Questions
1) What exactly is the TOTO THU370 replacement part?
The THU370 is a seal gasket for a TOTO drain valve. It's a soft sealing washer, not a whole drain body, so you're buying the part that stops water bypassing the valve seat, not a complete assembly.
2) Is the TOTO THU370 gasket for a sink drain or a toilet tank?
Sink. TOTO lists the THU370 under sink applications as a drain assembly part, so use it on a lavatory drain valve rather than treating it as a tank flush valve seal.
3) My TOTO lavatory drain is weeping at the stopper. Will the THU370 fix it?
If the leak is water passing the drain valve seal rather than the tailpiece joint or the trap, the THU370 is the part that addresses it. It's the sealing gasket inside the drain valve. A drip at a threaded slip joint below the sink is a different problem and needs a slip joint washer or nut, not this gasket.
4) Do I need any tools or extra parts to install the THU370 seal gasket?
No additional hardware ships with the gasket and none is normally needed. It's a drop-in seal replacement for a TOTO drain valve, so the work is disassembling the drain to reach the seat, swapping the old gasket for the THU370, and reassembling. If the drain body itself is corroded or the tailpiece washers are hardened, order those separately, since this is the seal only.
5) How do I order the right TOTO drain seal gasket for a maintenance stock order?
Order by the TOTO part number THU370. There is one configuration, so no finish, size, or handing choice to make. For property managers standardizing a lavatory fleet, that makes it straightforward to stock a quantity of the same seal against the TOTO drain valves already installed.
How fast can I get the TOTO THU370 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 THU370 come with a warranty?
Absolutely. The TOTO THU370 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 THU370?
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 THU370 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.