Fienza Kaya Tornado Flush Back-to-Wall Toilet Suite

In Australia, toilets carry a WELS (Water Efficiency Labelling and Standards) rating from 1 to 6 stars. Most modern wall faced toilet suites achieve a 4-star rating or higher, using 4.5/3L dual flush. Some premium models like the Caroma Cleanflush range achieve 5 stars with as little as 3/4.5L per flush. A higher WELS rating means lower water bills and less environmental impact.

A rimless toilet has no enclosed channel under the bowl's lip. Traditional rimmed toilets have a hidden channel that water flows through during flushing, this is hard to clean and can harbour bacteria and limescale. A rimless bowl flushes water directly across the surface instead, making it easier to keep hygienic.

A wall-faced (close-coupled) toilet has the cistern sitting on top of and against the pan, with both visible. A behind-the-wall (in-wall/concealed) toilet hides the cistern inside the wall cavity, leaving only the pan and a flush plate visible. A wall-hung toilet goes further again, mounting the pan itself off the floor for a fully floating look.

The cistern is housed in a pre-fabricated in-wall frame (called a carrier frame or in-wall system), which is installed by a plumber before the wall is tiled or sheeted. The flush button on the wall face connects via a pneumatic or mechanical system to the cistern inside the wall. Brands like Geberit are the industry standard for in-wall frames in Australia, known for their reliability and long service life.