A wall-hung toilet is not just about looks. The floor below remains open and simple to wash, the cistern sits concealed inside the wall, and the bathroom gets an extra 15–20 centimetres of practical space. In new developments around Wilanow and refurbished flats in Mokotow, concealed-frame toilets are now the standard choice. But fitting one is more demanding than installing a regular floor-mounted unit: you need a steel support frame (concealed cistern frame), accurate drainage connections, and firm wall fixings. If something is done badly, water can leak inside the partition and stay unnoticed until the damage is already there.

Safety note: plumbing work needs real care. One badly sealed joint is enough for water to get into the wall cavity or drip through to the flat below. If you are not sure what you are doing — call a professional. We deal with sanitary installations every day and know exactly where problems start.

How much does it cost

The cost depends on the frame model, the state of the existing pipework, and how complicated the boxing-in is. Installing into a solid masonry wall is one kind of job; fitting it into a stud partition is another. Replacing an old frame costs more because the existing cladding needs to be removed and the new frame has to be set perfectly in line. Current rates for all bathroom services are in the table below. Fixings are included in the price; the frame, bowl and flush plate are provided by the client.

How the installation works

1. Site inspection: we inspect the wall (load-bearing or partition), the position of the soil stack, and the water supply point. We also set the bowl height — the standard is 40–43 cm from the finished floor.
2. Marking out and fixing the frame: the frame is aligned vertically and horizontally, then fixed to the floor and wall with expansion bolts. It has to be absolutely rigid — the frame carries loads up to 400 kg.
3. Connecting the drain: the frame outlet is connected to the soil pipe with a connector sleeve. We check the fall — at least 2 cm per metre, otherwise blockages will come sooner or later.
4. Connecting the water supply: cold water is brought to the concealed cistern. We use either a flexible hose or a rigid pipe, depending on the setup.
5. Leak test: the cistern is filled, a test flush is carried out, and every joint is checked. This is done BEFORE the frame is boxed in — once it is covered, getting to the connections is far more difficult.
6. Boxing in the frame: the frame is covered with moisture-resistant plasterboard or another suitable panel. An access opening is left where the flush plate goes so the cistern internals can still be reached.
7. Hanging the bowl: the toilet is installed on the threaded rods, connected to the flush and waste outlets, and the flush plate is mounted. Final check — flush cycle, refill, and no movement in the bowl.

Common mistakes

• Frame fixed only to plasterboard, with no noggins or reinforcement — after a few months it begins to shift.
• No leak test before boxing in — the problem is found only when water shows up on the neighbour’s ceiling.
• Frame not set level — the bowl hangs at an angle and you can see it straight away.
• Buying a cheap no-name frame — spare parts cannot be found and the flush mechanism gives up within a year.
• No service access to the cistern — when something fails, all the cladding has to be broken out.
• Wrong fall on the drain pipe — the toilet flushes badly and a smell starts to appear.
• Connector sleeves cut too short — once the bowl is mounted, the joint does not seat fully and starts leaking.

What to prepare before the visit

• Buy the frame (with integrated cistern), the bowl, and the flush plate — check in advance that all parts are compatible.
• Make sure there is cold water and a waste outlet at the installation point.
• Remove furniture and loose items from the bathroom — the installer needs clear access.
• Check the wall thickness where the frame will be fixed — this decides the frame depth.
• If you are planning to tile over the cladding — tell us in advance, because it affects the total build-out thickness.
• Make sure the isolation valves for the water supply can be reached — they will need to be turned off during the job.
• If the building has old cast-iron drainage — mention it beforehand, as an adapter may be needed.

A real case from Warsaw

We were called to a new-build flat in Wilanow. The owners were redoing the bathroom and wanted to replace a floor-standing toilet with a wall-hung one. The wall was aerated concrete, and the waste outlet sat to the side of the stack — not in the usual position. We fixed a Geberit frame with expansion bolts and ran the drain through an angled connector with the correct fall. The cistern was connected using a rigid supply line — a safer option for a concealed installation. Before cladding, we checked every joint twice — completely dry. We boxed it in with moisture-resistant board, keeping the flush-plate opening accessible. The bowl was then hung and levelled. The whole job took around four hours. Later, the owners tiled the wall — neat finish, no leaks at all.

Frequently asked questions

Book the installation

A wall-hung toilet gives you a clear floor, more room, and a more modern bathroom. But the installation has to be exact: frame, drainage, watertight joints — each stage counts. We work across Warsaw and come with all tools and fixings. Get in touch — we will arrange a convenient time and do the job properly.