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PUSH BUTTON ASSEMBLY CST646
Manufacturer Resources
Product Specs
- Product Group:
- Washroom/Bath Accessories
- Product Subgroup:
- Parts and Accessories
- Product Type:
- push button
- Parts and Accessories Type:
- Cap
- Department:
- Plumbing
TOTO THU736#CP-A – Frequently Asked Questions
1) What does the TOTO THU736#CP-A push button assembly fit?
The THU736 push button assembly is the flush actuator for the TOTO CST646 Aquia IV one-piece toilet. It is a factory replacement part, so it drops into the tank lid opening the CST646 was built with. If the tank on the fixture you are servicing carries a different TOTO model number, this is not the button for it.
2) My Aquia IV dual flush button sticks down or won't trigger the flush. Do I replace the whole button?
That is the usual repair. The THU736 comes as a complete push button assembly rather than a loose cap, so the button, its housing and the actuating mechanism are replaced as one unit and you are not trying to match a worn spring or a cracked plunger. Pull the tank lid, unthread the retaining collar under the lid, drop the new assembly in and retighten. Only the actuator changes; the flush valve in the tank stays put.
3) Will the TOTO THU736 push button work on an Aquia IV two-piece or a Drake toilet?
No. THU736 is specified to the CST646, the one-piece Aquia IV. TOTO uses a different actuator on the two-piece Aquia IV and a trip lever, not a push button, on Drake models. Read the model number stamped inside the tank or on the china behind the seat before ordering, and match the THU number to that fixture.
4) Is the TOTO THU736 a genuine TOTO replacement part or an aftermarket button?
Genuine TOTO. The part is ordered under TOTO's own number, THU736#CP-A, as a replacement part for the CST646 tank. For a property manager standardizing on TOTO fixtures across a building, that matters: the actuator geometry and the pushrod travel are matched to the flush valve TOTO shipped in that tank, which an aftermarket universal button is not.
5) What does the #CP suffix mean on a TOTO part number like THU736#CP-A?
On TOTO part numbers the code after the hash is the finish, and #CP is polished chrome. So THU736#CP-A is the chrome push button assembly. Order the full string including the suffix, since TOTO builds the same actuator in other finishes and the number without a suffix will not identify a specific part.
How fast can I get the TOTO THU736#CP-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 THU736#CP-A come with a warranty?
Absolutely. The TOTO THU736#CP-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 THU736#CP-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
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