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CHINA LID FOR CST646U
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- china lid
- Parts and Accessories Type:
- Tank Lid
- Department:
- Plumbing
- Application:
- Toilet
TOTO TCU646CRU#03 – Frequently Asked Questions
1) Which TOTO toilet does the TCU646CRU#03 tank lid fit?
The TCU646CRU#03 is the vitreous china tank lid made for the TOTO CST646U toilet. It is a direct replacement lid for that tank only, so match your toilet's model number stamped inside the tank or on the bowl before ordering. It is the lid by itself, not a tank or trim kit.
2) I cracked the lid on a TOTO toilet in one of my units. Can I just buy the lid instead of the whole toilet?
Yes, on a CST646U you can replace just the lid. The TCU646CRU#03 is sold as a standalone china tank lid, which is the usual fix for a chipped or cracked cover when the tank and bowl are fine. Confirm the toilet is a CST646U, since TOTO lids are model specific and will not seat correctly on a different tank.
3) Does the TCU646CRU#03 come with the flush valve or trip lever?
No. The TCU646CRU#03 is the china lid alone. Any flush valve, fill valve, trip lever, or tank-to-bowl hardware has to be ordered separately. If the lid on your CST646U is intact and the issue is flushing, the lid is not the part you need.
4) What does the #03 suffix mean on a TOTO part number like TCU646CRU#03?
On TOTO part numbers the code after the hash is the finish. TCU646CRU#03 is the finish variant of this CST646U china lid that ZenSupply carries, and the full number including the suffix is what you order by. Ordering the base number without the suffix can land you a lid in a different color than the toilet it sits on.
5) Will a TOTO tank lid from a different toilet model fit the CST646U?
Generally no. China lids are cast to the rim profile of one specific tank, so a lid from another TOTO model will sit proud, rock, or foul the flush valve. For a CST646U, the matching lid is the TCU646CRU#03.
How fast can I get the TOTO TCU646CRU#03 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 TCU646CRU#03 come with a warranty?
Absolutely. The TOTO TCU646CRU#03 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 TCU646CRU#03?
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 TCU646CRU#03 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.