Toto AQUIA IV 2PC PUSH BUTTON ASSM THU736#01-A

THU736#01-A is the push button assembly for TOTO Aquia IV dual-flush toilets. It is the trip mechanism that sits in the tank lid and transfers your press to the flush valve, so it is the part you order when the buttons stick, feel spongy, or no longer trigger a flush. It is a toilet part only, not a complete flush valve or tank kit.

It is the Aquia IV push button assembly, so order it against your Aquia IV model number. TOTO replacement trim is matched to a specific tank, and a button assembly from one Aquia generation will not seat correctly in another lid. Check the model stamped inside your tank or on the porcelain before ordering.

The #01 suffix is TOTO's Cotton White finish code, which is how the company designates its standard white on both china and trim parts. If your Aquia IV is a color other than Cotton White, you need the matching suffix for that color rather than #01.

For units fitted with Aquia IV two-piece toilets, yes, this is the wear part worth keeping on the shelf. Push buttons take every flush in a high-traffic unit and fail long before the tank or the bowl does, and swapping the assembly is a lid-off job rather than a fixture replacement. Stock it by the exact model code, THU736#01-A, because TOTO trim is generation specific and the adjacent part numbers will not drop in.