TOTO DuoFit In-Wall Tank System – WT173M / WT173MA

TOTO DuoFit WT173M is an in-wall tank system with copper WASHLET supply line and 1.28/0.9 GPF dual flushing. Select WT173MA for the Auto Flush connection.

Designed for compatible TOTO wall-hung bowls. Bowl, WASHLET and required push plate are sold separately. The official specification lists compatible bowls and outlet options; confirm the complete installation with our showroom.

Special order: please contact our showroom at 714-833-5375 to confirm availability, lead time, pricing and shipping before ordering.

Official TOTO specification sheet (PDF)

Official TOTO product information — verified November 7, 2026.