Back To Wall Toilets

Buy Premium Back-to-Wall Toilets Online in Australia

At Designer Bathware, back-to-wall toilets are one of the most requested toilet formats across Australian renovations. The cistern sits concealed inside a wall cavity or purpose-built unit, leaving only the pan visible. No gap behind the toilet, no exposed plumbing, nothing to clean around. The result is a bathroom that looks intentional & is genuinely easier to maintain.

The range covers rimless and traditional pan styles - P-trap and S-trap options and finishes in gloss white, matte white and matte black - from brands including Fienza, Caroma, Koko and more. Cistern options include standard R&T, Geberit Sigma and Viega in-wall systems.

What Is a Back to Wall Toilet

A back-to-wall toilet pan is floor-supported and sits flush against the wall, concealing the trap and connecting pipework for a clean, streamlined look. The cistern is typically hidden within a furniture unit rather than built into the wall cavity (as with an in-wall toilet) or left exposed on top of the pan (as with a close-coupled toilet).

Because the pan rests on the floor rather than being fixed to the wall, it also skips the rated in-wall frame a wall-hung toilet requires — making it a simpler option to install.

Quick reference:

Back to Wall Toilet Dimensions

Dimension planning before purchase is non-negotiable for back-to-wall toilets. Around 60% of buyer questions about toilets relate to rough-in compatibility - making it the single most critical measurement to confirm before ordering. Key measurements to know:

• Pan height — Standard seat height sits around 395mm from the floor. Comfort height options (460mm to 480mm) suit elderly users or taller households.
• Projection depth — Standard back-to-wall depths generally range from 600mm to 700mm from the wall face to the front of the pan. Compact models may project less.
• Pan width — Typically between 350mm and 400mm.
• Set-out distance — This measures the space from your finished wall to the centre of the waste pipe. Our catalogue covers standard Australian set-outs of 140mm, 165mm, and 200mm.
• P-trap vs S-trap — If your waste pipe comes out of the floor, you need an S-trap. If it comes out of the wall, you need a P-trap. Most Fienza and Caroma back-to-wall models are available in both.

Key Technical Specifications and Dimensions

Back to Wall Cistern Options

The cistern type changes the price, the flush button style and the installation requirements.

• R&T in-wall cistern — Standard and most affordable. Good choice for most residential builds.
• Geberit Sigma — Premium German-engineered in-wall system. Quieter, more durable and compatible with a wider range of designer flush button plates in chrome, brushed nickel, gunmetal and matte black.
• Viega — Available in V-01, V-02 and V-04 formats. A solid mid-range alternative to Geberit.

Flush button plates are a separate finishing choice and can be matched to your tapware finish. Brushed brass, matte black, gunmetal and chrome options are stocked in the range.

Back to Wall Rimless Toilets

Most models in the range are rimless. A rimless back-to-wall toilet removes the inner rim channel from the bowl, eliminating the hardest-to-clean surface in a traditional toilet.

All plumbing stays hidden on back-to-wall toilets, which solves the cleaning challenge most homeowners know well. Combined with a rimless bowl, the overall maintenance requirement drops significantly compared to a traditional close-coupled suite.

Brands stocked in rimless back-to-wall formats include Fienza (Koko, Aluca, Isabella, Lillian, Kaya) and Caroma (Luna, Urbane II).

How to Install a Back-to-Wall Toilet

Back-to-wall toilet installation involves:

1. Preparation — The waste outlet and water supply points are confirmed against the pan's set-out dimensions before the floor and wall finishes go in. This ensures the pan will align correctly once tiling is complete.
2. Furniture unit or concealment panel installation — The cabinet or panel that will house the cistern is positioned and fixed against the wall, with cut-outs for the waste, water supply, and any cistern access points.
3. Cistern installation — The cistern is fitted within the furniture unit or concealment panel and connected to the water supply.
4. Pan installation — Once tiling is complete, the pan is fixed to the floor and connected to the waste and water supply. A licensed plumber must carry out the supply-side connections under Australian plumbing regulations.
5. Flush mechanism and finishing — The flush button or lever is fitted last, along with the seat and any remaining trims or panels.
6. Testing — The plumber checks the flush, refill, and waste connections for leaks and correct operation before handover.