What a wall hung toilet is
A wall hung toilet has a pan that hangs off the wall with nothing touching the floor. The cistern is concealed inside the wall, so only the pan and the flush plate show. A steel carrier frame fitted inside the wall holds the pan up. That frame takes the weight of the pan and of everyday use, which is why fitting one is a different job from replacing a standard suite.
This page holds wall hung suites from Caroma. Each pairs a rimless Cleanflush pan with an Invisi Series II concealed cistern, which has its own Invisi Series II collection page. For the in-wall format more generally, see in wall concealed toilets. The toilets page covers the measurements every toilet shares.
Is a wall hung toilet a good idea?
It is a good idea when the wall is already open. The floor beneath the pan is clear, so there is no base, join or corner to clean around, and a mop goes straight through. A clear floor can also make a small bathroom feel less cramped, and the pan appears to float, which gives a minimal look.
As a quick swap it is the wrong choice. The wall usually has to be opened, framed and sheeted again to take the frame, so the format makes sense in a full renovation or a new build. If the wall is not changing, a back to wall toilet is the simpler route. Its pan stands on the floor and needs no wall frame.
What to plan for
Three things need a decision before work starts. The first is the frame and the structural wall work. Both have to be planned, and neither can be added later without opening the wall. The second is access to the cistern. Access is through a panel, usually the flush plate, which is less convenient than the removable panel on a back to wall unit, so settle the service opening before tiling. The third is timing. The frame is built into the wall, so the toilet has to be chosen before framing and tiling begin, to make sure the wall suits the pan.
Brand matching matters at this stage too. The cistern and frame must be compatible with the pan. If a frame goes in months before the toilet is chosen and the makes do not match, the choice of pans shrinks fast. Lock in the pan and the frame together, and keep both sets of installation instructions.
Set out and trap
A wall hung pan always needs a P trap set out, which means the waste leaves through the wall. The Contura II wall hung suite is a P trap pan with a variable set out of 60 to 200mm using the supplied connector. Measure the set out from the finished floor to the centre of the wall outlet, note the inlet position, and have a plumber confirm that the frame suits the pan before anything is ordered. The toilets page explains S trap and P trap in more detail.
The suites in detail
The Contura II wall hung suite comes in matte white. Its pan height is 405mm excluding the seat, its projection is 535mm and its overall height is about 947mm. It takes a P trap, the water enters at the back, and it is rated 4 star under WELS at 4.5 and 3 litres per flush. The box holds the pan, a cistern, a seat, a fixing kit and the installation instructions. Wall hung brackets are included. The pan is rimless with Cleanflush and GermGard, the seat is soft close with quick release, and the flush buttons and hinge caps are made to colour match Contura II tapware.
The Liano wall hung suite pairs a wall hung pan with an Invisi Series II 4.5 and 3 litre concealed cistern. That cistern can be installed in-wall, in-duct or in-ceiling, and it is serviced from the button panel. The buttons are sold separately, and the seat is a thin, removable soft close design. Ask us for the cistern sizes before you plan the wall around it.
The Caroma electronic bidet seat lists the Liano wall hung Invisi II suite among the suites it fits, which matters if you want washing later. See bidet toilet seats. That fit applies to the named suite only. Before you assume a seat or a bidet will fit any other wall hung pan, check its compatibility.
Why the access panel is a plumbing requirement
AS/NZS 3500.0 defines accessible as capable of being reached for inspection, maintenance, repair or replacement. Cutting plasterboard, or breaking tiled, waterproofed or fire rated surfaces in future, does not count as access. A concealed cistern has valves that wear, so the plate or a purpose-built panel has to remain the way in. Never tile over it, and keep the position clear of shelving and fixed fittings.
Frame loads and fixing
The pan hangs on the frame, not on the wall lining. The frame and the wall behind it carry the load. Geberit Sigma8 Duofix frames for wall hung pans are rated to 400kg, and they can be fitted as pre-wall, in-wall or stud installations at a minimum depth of 80mm. The wall type you have decides which fixing method applies. Ask your builder to confirm that the stud or masonry behind the frame suits that method before the plasterboard goes on.
A concealed cistern also opens up options that are decided at frame stage. Geberit cisterns can be placed remotely, with the button up to 2 metres from the cistern, so the cistern does not have to sit directly behind the plate. An odour extraction unit can be added to some plates. Raise each of these with the plumber before the wall is closed.
Choosing the flush button
With a concealed cistern, many models sell the button plate separately from the toilet, and the plate is also the way into the cistern. Caroma concealed toilet buttons holds the plates that fit these cisterns, and concealed toilet buttons covers the wider choice. Match the plate to the cistern it is made for. A pan, a frame and a plate from three different makers will not necessarily work together.
Clearances and projection
The Contura II projection is 535mm, which is short for a full size pan and counts in a small room. Allow at least 450mm in front of the pan and at least 400mm from the pan centre to a side wall. Accessible bathrooms need wider clearances under the National Construction Code. A wall hung pan leaves the floor open, so those clearances are easy to see and keep, but measure them on the finished room and not on the plan.
Water use
The Caroma wall hung suites carry a 4 star WELS rating with a 4.5 litre full flush and a 3 litre half flush, a 3.5 litre average. WELS rates a toilet from the water used by four half flushes and one full flush, and more stars mean less water. A new home usually needs a minimum of 4 stars, and a replacement 3 stars, though local rules can differ. A wall hung suite usually comes with a renovation, so confirm the figure for your project before you order.
Cleaning around and under a wall hung pan
With the pan off the floor there is no base and no join to clean around, and a mop goes straight through. The pan still needs the usual care. Clean weekly with a mild, non-abrasive bowl cleaner and a soft brush, and avoid scouring pads and steel wool, which can dull the glaze. In-tank cleaners are no risk here, since the cistern sits behind the wall. Wipe cleaner splashes off the plate and any plated finish straight away, and treat scale early with a cleaner made for hard water deposits.
The Liano wall hung pan, seat and connector
The Liano pan is made from vitreous china and has added height, which makes it easier to get on and off. Its Cleanflush rimless design gives full visibility of any grime build-up, and the minimal lines and gaps wipe down with a cloth. The soft close hinge seat is white, thin and removable, with a quick release for cleaning.
The Liano suite is supplied with the patented Uni-Orbital connector, which extends to any position within a 50mm radius. That is a real help on a tricky plumbing set out, since the waste outlet does not have to land on one exact point. The connector is only available with Caroma wall faced and wall hung toilets. An under counter version of the Liano suite is also listed, for a cistern that sits below a bench or ledge. Both Liano and Contura II suites carry WELS 4 star ratings and Watermark certification, so the water and plumbing requirements are met for the pan, the cistern and the parts.
Which wall hung suite suits which room
The Contura II suite suits a bathroom that is being rebuilt around a new wall, where the cistern, frame and plate can be settled as one package. Its short 535mm projection helps in an ensuite or a powder room where the door swing and the vanity leave little spare floor. The matte white finish pairs with the colour matched buttons and hinge caps, so the plate and the seat read as part of the same design.
The Liano suite suits a job where the cistern position needs flexibility. Because the cistern can go in-wall, in-duct or in-ceiling, a builder has more choices when a wall is shallow or a duct is already planned. Because the buttons are sold separately, you can choose the plate once the tile and tapware finishes are fixed.
If you are replacing an existing close coupled suite and the wall will stay as it is, this page is the wrong starting point. Look at back to wall toilets instead. If you are fitting out a bathroom with a Geberit frame already in the wall, the Geberit cistern and toilet suite packages page lists pans and plates that suit it.
Brands and related ranges
Both suites come from Caroma toilets. For someone with limited mobility, see accessible toilets, and plan the pan height and clear space first.
