Installing a WC frame – how to do it properly?

What is a concealed WC frame and why is it worth using?

A concealed WC frame is a metal structure with a hidden cistern on which the WC bowl is mounted. After installation, only the ceramic bowl and the flush button remain visible.

What does this mean in practice?

• Concealed pipes and cistern – the bathroom looks lighter and more modern.
• Wall-hung WC bowl – easier floor cleaning.
• Possibility to build in a shelf – additional space for cosmetics or decorations.

Application: an ideal solution for both modern bathrooms and renovations where you want to improve aesthetics without changing the entire room layout.

WC frame enclosure – what should you know before installation?

WC frame enclosure is always carried out in stages. The sequence is crucial, as it determines the stability of the structure and trouble-free use for years.

The most common mistake is installing “by eye”, without prior planning of height, depth and type of enclosure.

How to choose a WC frame for your bathroom?

Choosing a WC frame should depend not only on aesthetics, but above all on the renovation stage, wall type and the amount of available space. One solution works best in a new home, another in a bathroom renovated as a “finished” interior.

A properly selected frame makes installation easier, ensures ceramic stability and helps avoid compromises that later make everyday bathroom use more difficult.

Frame for wet installation

Requires brickwork enclosure, which is why it works best in newly built bathrooms or where work is carried out from scratch. It provides a very solid structure and high load resistance.

Frame for dry installation

Mounted to the wall and enclosed with plasterboard, it significantly shortens the installation time. This is a good solution for renovations and smaller bathrooms.

Low frame

Thanks to its reduced height, it allows installation in non-standard locations, for example under a window or beneath built-in furniture.

Self-supporting frame

Has a reinforced structure, allowing it to handle heavier enclosures and large format tiles.

Choosing the right type of frame allows the entire enclosure to be adapted to the technical conditions of the bathroom and helps avoid problems after the renovation is completed.

Which WC frame parameters should you pay attention to?

When choosing a frame, dimensions are not the only factor. Be sure to check:

• Cistern capacity – the standard is 6 litres; dual-flush systems save water.
• Frame width – crucial in narrow bathrooms.
• Flush button compatibility – important for future replacement.

WC frame installation step by step – key stages

WC frame installation is best treated as a process. Each stage prepares the ground for the next and reduces the risk of corrections after tiles are laid.

Step 1: Choosing the location and levelling the frame

Perfect levelling of the frame and determining the final WC bowl height are crucial.

Step 2: Secure mounting of the frame

The frame must be firmly fixed to the wall and floor in accordance with the manufacturer’s recommendations.

Step 3: Connecting the installations

• water supply to the cistern,
• connection to the sewage outlet,
• checking the tightness of connections.

Step 4: Dry fitting of the WC bowl

Test installation of the bowl allows stability and tightness to be checked before enclosure.

Step 5: Enclosing the frame

• wet installation – brickwork enclosure,
• dry installation – plasterboard panels.

Step 6: Finishing and installation of ceramics

After tiling, the WC bowl and flush button are installed.

Worth remembering…

A well-planned WC frame installation translates into comfort, aesthetics and trouble-free bathroom use for years.

Thoughtful decisions at the planning stage help avoid costly corrections.

FAQ

Does every WC frame fit every bowl?

No. Always check bolt spacing and manufacturer compatibility.

Can a WC frame be installed in a small bathroom?

Yes, provided the appropriate depth and enclosure type are selected.

In case of failure, does the wall need to be broken?

No. Service access is provided through the flush button opening.

At what height is a WC frame installed?

Typically about 40–42 cm to the upper edge of the bowl, taking household members’ height into account.