Installing a concealed WC unit is essential in every modern bathroom. The solution is both aesthetic and functional. To be fully useful, attention must be paid to the smallest details during installation. The task is demanding. It requires knowledge and experience. Once the sanitary installation is concealed, it is impossible to make corrections without undertaking another costly renovation.
What will you learn from this article?
The installation of a concealed frame is a solution eagerly chosen by those creating modern, aesthetic, and functional bathrooms. From this article, you will learn:
-
How to install a concealed unit.
-
How to install a concealed cistern.
-
What the correct distance is between the WC frame and the wall.
-
What the standard width of a concealed unit is.
-
What mistakes to avoid when connecting the WC frame.
Why choose a concealed frame?
Concealed elements in modern interiors positively affect their perception. One of the more popular solutions is the concealed kit. A well-executed installation ensures hassle-free use of the WC or bidet for years. The concealment helps hide pipes and saves a lot of space in the bathroom. The entire construction appears light. It becomes significantly easier to maintain cleanliness in the toilet, as a wall-hung WC bowl is dedicated to the concealed unit. The floor can be easily cleaned as there are no additional crevices. Find out how to install a WC bowl to achieve the best effect in your bathroom.
The concealed frame belongs to practical bathroom elements. With its help, you introduce:
-
aesthetic and modern equipment,
-
hygiene in maintaining the cleanliness of the interior,
-
better space utilization.
What do you need to know to correctly choose a concealed frame?
WC frames are different. They are not universal solutions, so it is crucial to decide on a product properly matched to the installation location. Pay particular attention to the dimensions of the concealed frame:
-
Width, or the distance between the sides of the frame — choose such a parameter that allows for trouble-free installation in the selected location. Verify whether the dimension you choose does not collide with the rest of the bathroom equipment.
-
Depth, or the distance from the front part to the back wall — this primarily affects the selection of the appropriate WC enclosure.
-
Height, or the distance from the floor to the top of the frame — this translates into the comfort of using the toilet and the bathroom's appearance.
You have three types of WC frames to choose from:
-
Heavy construction concealed unit, or wet — ideal if the bathroom has masonry walls. During the installation of the concealed frame, it must be built in, so it is time-consuming. It is worth buying a frame filled with styrofoam.
-
Light construction concealed unit, or dry — works well when installing on masonry walls and plasterboard.
-
Freestanding concealed unit — has a reinforced frame and a larger profile. It is perfect for atypical bathroom projects.
The concealed unit also includes a concealed cistern. It is worth deciding on the right dimensions to achieve high bathroom functionality. Choose the width, depth, and height to suit your needs. Also, pay attention to the flush button, which will translate into the aesthetics and functionality of the bathroom space. The button must be large enough to use comfortably. At the same time, it should not dominate the bathroom.

Steps to take before installing a WC frame
If you want the connection of the concealed WC unit to go smoothly, benefiting the aesthetics and functionality of the bathroom, it is worth deciding on the right installation location.
First of all, make sure the wall where you plan to install the concealed unit is stable and will support the weight of the WC frame and water tank. Sometimes it is necessary to reinforce the wall with beams or brackets.
When planning the installation of the concealed frame, the distance from the wall and other elements in the bathroom must be carefully considered. To obtain optimal space and full freedom of movement, maintain a distance of 20-30 cm between the frame and the washbasin. Access to both the WC and the washbasin will be trouble-free. When determining the distance from the shower cabin, maintain a gap of at least 30 cm, and from the bath, 30-40 cm. The distance the WC frame should have from the wall depends on the model you choose. Standard, according to the manufacturer's instructions, is usually 2-5 cm. You can be sure that you maintain the appropriate space required for ventilation, mounting, and servicing the unit in the future.
By carrying out the concealed installation while maintaining the indicated distances, you prepare a comfortable and safe-to-use bathroom.
Installing the concealed frame step by step
When you have already chosen the right WC concealed unit, plan the installation calmly, remembering precision and care in executing the task. This way, you avoid costly and time-consuming mistakes to fix.
-
Prepare the installation site for the WC frame — read the manufacturer's instructions and follow all their recommendations.
-
Attach the frame to the wall and floor — choose the optimal height and maintain the correct distance from the wall. You will get the appropriate values using special telescopic supports.
-
Perform the internal water and sewage installation — check that all connections are tight, both with the bowl and the cistern. The water connection to the cistern is usually made using plastic or metal pipes. A shut-off valve must be used in the pipe that carries the water away. In the frame enclosure, a revision hole must be drilled, allowing the water to be shut off in the event of a failure.
-
Make the frame casing from plasterboard — tiles must be applied to the material, leaving space for the cistern and mounting screws.
-
Attach the WC bowl to the frame — use the screws and connections supplied with the product by the manufacturer.
-
Ensure sealing — use sanitary silicone to make sealing between the bowl and the wall. This will also affect the aesthetics of the WC area.
Find out how to install a concealed shower mixer.
Installing the concealed cistern and flush button
Fixing the WC frame is also connected with installing the concealed cistern. To do it correctly:
-
Prepare the installation spot — ensure it is clean, dry, and adequately reinforced.
-
Connect the cistern to the water supply — choose and install the pipes that will bring water to the cistern. Check for any leaks.
-
Install the cistern — you can choose a model with a tank for vertical or horizontal installation. To do the job correctly, follow the manufacturer's instructions.
-
Connect the cistern tank to the drainage system — all connections must be tight. Test the cistern several times in a row to see if it works properly and if there are no leaks.
The most common mistakes made when installing a WC frame in the wall
Installing a concealed frame is not as difficult as it might seem. Before starting work, it is worth familiarizing oneself with all the manufacturer's guidelines and practical tips on installation. By acquiring the correct knowledge, you can avoid typical mistakes that prevent proper WC use.
-
Detachment of the construction from the wall — this is an extreme case. More often, the enclosure begins to bend dangerously. The reason is improper WC frame installation or inadequate wall strength to support the weight. This happens most often when using low-quality plasterboard.
-
Defective water and sewage installation — if made from low-quality materials, it will start to become faulty over time. Problems can also arise from improper connection of elements, resulting in leaks.
-
Discomfort during use — most often caused by installing the bowl at the incorrect height. Meanwhile, a low-quality flush system will make it difficult to remove impurities from the bowl.
If installing a concealed WC is too difficult for you, hire a professional to do the job. You will avoid the above mistakes.
Following these tips, you will correctly install a concealed WC unit
Installing a concealed WC unit requires precision, high-quality materials, and proper installation site preparation. Learning how to correctly install a concealed WC will give you an aesthetically pleasing bathroom look, and you can use it without any problems for years.
To have a properly functioning concealed WC unit in your bathroom, the installation should include:
-
Use of high-quality materials — inexpensive solutions will cause many problems in the long run, such as leaks and corrosion.
-
Following the manufacturer's instructions — each concealed unit is different. To avoid mistakes, follow the manufacturer's recommendations.
-
Level verification — this should be done regularly during installation. If you install the concealed frame crookedly, there will be issues with the proper functioning of the cistern.