TOTO Aquia IV Toilet Tank, White

Updated September 19, 2026

Retail value $221. New - See Note. TOTO Aquia IV Dual Flush 1.28 and 0.9 GPF Toilet Tank Only with WASHLET + Auto Flush Compatibility, White Brand TOTO Model ST446EMNA#12 Amazon Product B0B83VL91W Note: Color is white The TOTO Aquia IV Dual Flush Toilet Tank is a sleek, space-conscious vitreous china tank designed for use with the Aquia IV toilet bowl, combining modern styling with exceptional water efficiency. Featuring TOTO's Dual-Max flushing system, it allows users to select either a 1.28 GPF full flush for solid waste or a 0.9 GPF light flush for liquid waste, helping reduce household water consumption without sacrificing performance. A chrome, center-mounted push button on the tank lid provides easy operation, while WASHLET+ and Auto Flush compatibility offer a future-ready upgrade path for a more hygienic, hands-free bathroom experience. The tank is WaterSense certified and compliant with CALGreen and CEC water-efficiency standards. Included with the tank are the tank-to-bowl gasket, tank-to-bowl mounting hardware, and toilet bolt caps; the matching bowl, wax ring, mounting bolts, water supply line.

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