In-Wall Tanks

In-Wall Tanks are concealed cisterns that sit inside the wall framing behind a wall-hung toilet, so only the bowl and a flush plate are visible in the finished bathroom. The tank is usually paired with a steel carrier frame that fastens to the studs and floor and supports the weight of the toilet bowl. This page brings together in-wall tank and carrier systems, flush actuator plates and access panels from Kohler, Caroma, TOTO and Geberit, with examples such as the Duofit In-Wall Tank System, the Invisi II In-Wall Carrier System and the Veil In-wall tank and carrier.

Because the tank is hidden, this type of installation is planned at the framing stage rather than added at the end, and the bowl, tank, carrier and actuator plate are chosen together as one system. Finish options on this page include Polished Chrome, Matte Black and Vibrant Brushed Nickel, so the visible plate can match the taps and accessories in the room. If you are renovating or building a new bathroom and want a floor that is easier to clean, a toilet that projects less into the room or a cleaner wall line, an in-wall tank is the place to start.

What to check before you buy

• Check your wall framing depth. The tank and carrier have to fit inside the stud cavity, and actuator plates are made for a specific framing depth, such as 2" x 4" or 2" x 6" walls. Measure the wall before choosing a system.
• Match the plate to the tank system. Flush actuator plates are designed to work with a particular tank and carrier from the same maker. Confirm the plate is intended for your tank before ordering, since plates from different systems are not interchangeable.
• Confirm the toilet bowl pairing. Wall-hung bowls hang on the carrier's bolts and connect to its outlet, so check that the bowl you want is designed for the carrier you are buying.
• Plan the water supply and drain. Decide how the supply line will reach the tank and where the drain will run before the wall is closed, and have your plumber review the rough-in requirements for the system.
• Think about future service access. The fill valve and flush mechanism are reached through the actuator plate opening or an access panel, so leave room for that and avoid tiling it over.

Related pages and guides

• Wall-Hung Toilet Cost Guide: Bowl, In-Wall Tank & Install
• Geberit In-Wall Carriers: A Canadian Buyer's Guide
• TOTO Wall-Hung Toilets: A Canadian Buyer's Guide

Frequently asked questions

What is an in-wall tank system?

It is a toilet tank that is hidden inside the wall, usually mounted on a steel carrier frame that also supports a wall-hung bowl. From the room you see only the bowl and a flush plate on the wall.

Can I put an in-wall tank into an existing wall?

Yes, but the wall is opened up so the carrier can be fastened to the framing and floor, and the supply and drain are rerouted. It is simplest during a full renovation when the wall is already exposed.

Is the flush plate included with the tank?

Actuator plates and access panels are often sold separately from the tank and carrier so you can pick the finish and style you want. Check the product listing for what is included and choose a plate made for that system.