As part of a renovation project, opting for a concealed piping system provides an aesthetically pleasing, uncluttered and modern look. But this solution, while discreet, requires precise and rigorous installation. Poorly installed, it can lead to invisible leaks or costly repairs in the future. As experienced plumbers, we explain the key steps, precautions and best practices for successfully installing a concealed piping system in a renovation project.
Why choose flush-mounted piping?
Concealed installation is often preferred for aesthetic reasons: there are no visible pipes, and everything is integrated into the walls or floor. It also saves space and makes it easier to integrate into modern bathroom or kitchen designs. But this choice requires careful planning, particularly with regard to accessibility and future maintenance.
Steps for installing a concealed network in a renovation project
1. Draw up a precise plan of the installation
First and foremost, it’s essential to define the pipe layout, taking into account the location of sanitary fixtures and appliances, and the slope required for drainage. The plan must also take account of building constraints (load-bearing walls, insulation, existing ducts, etc.).
2. Choosing the right materials
Renovation is generally the preferred option:
- PER or multilayer for domestic hot and cold water: flexible, easy to install and with reliable connections.
- PVC for drainage, with diameters adapted to each use (washbasin, shower, WC…).
These materials offer good resistance to pressure and corrosion, and are well-suited to wall or slab installation.
3. Making recesses or reservations
Once the layout has been validated, the walls or floors must be opened to accommodate the pipes. This operation, known as trenching, must comply with current standards, particularly in terms of depth, marking and safety. It is essential to protect the pipes against friction (protective sheathing, resilient tape, etc.).
4. Attach and connect pipes
Pipes must be securely fastened to prevent movement over time. Fittings (elbows, tees, sleeves) must be perfectly watertight and tested before being recapped. In the case of multilayer or PER pipes, compression or press fittings are most commonly used.
5. Test for leaks before resealing
Before filling in the trenches, it’s essential to pressurize the network to check that the system is completely watertight. This test detects any leaks before they become inaccessible.
6. Sealing properly
Once the tests have been validated, the grooves can be filled with suitable mortar or plasterboard. It’s a good idea to identify the precise location of the pipes (photos, plans, markings) for any future interventions.
Precautions to take for long-lasting installation
- Never embed removable fittings in walls (prefer crimp fittings).
- Always provide reserves or access hatches for sensitive components (manifolds, shut-off valves).
- Observe minimum slopes for drains (1 to 2 cm/meter, depending on diameter).
- Insulate pipes in exterior walls to prevent freezing.
Why call in a professional?
Installing concealed piping in a renovation project requires precision, special tools and a thorough understanding of current standards. The wrong connection or slope can lead to invisible but serious problems (slow leakage, stagnation, noise, etc.).
A professional plumber guarantees :
- Durable, compliant installation
- Clean, fast, safe work
- Advice on choice of materials and feasibility
- Save considerable time on your construction site
Conclusion: flush-mount, yes… but with method
Integrating a concealed piping system into a renovation project means opting for aesthetics and modernity. But it requires meticulous work to guarantee watertightness, durability and conformity. To avoid any unpleasant surprises, it’s best to leave the job to seasoned professionals.
Do you have a renovation project involving the installation of concealed plumbing? Visit our plumbing department to find out more, or contact our team here.
