The TOTO DuoFit In-Wall Toilet Tank System redefines bathroom efficiency with innovative space-saving design and smart flushing technology. Designed to maximize your bathroom’s potential, this system saves up to 9 inches of floor space by integrating seamlessly into walls, ideal for compact or modern restrooms. Its Dual-Max® dual-flush mechanism offers precise water usage—0.9 GPF for light needs and 1.6 GPF for heavier demands—allowing users to choose the right flush strength with a simple button press.
The adjustable mounting height (15–19 inches) ensures ergonomic comfort for all users, while its robust construction supports up to 880 pounds when properly installed. The pre-installed PEX supply line simplifies setup and enhances durability against leaks or corrosion. Compatible with 2” x 6” studs standard, it also works with 2” x 4” configurations using an optional adapter kit (THU343), providing flexibility for diverse bathroom layouts.
For those seeking premium upgrades, the DuoFit’s integrated PEX supply line streamlines installation of TOTO’s WASHLET® bidet seats—simply add the THU468 connection kit to enjoy hands-free hygiene convenience. Note that this system requires a separate purchase of the toilet bowl and flush plate for full functionality.
Engineered for longevity and adaptability, this in-wall tank system combines eco-conscious design with customizable installation options, making it a standout choice for homeowners prioritizing both sustainability and spatial efficiency in their bathroom remodels or renovations.
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