
Plumber's Work in Belgium: Standards and Regulations to Know
In Belgium, plumbing services are governed by strict standards that vary by region (Brussels-Capital, Wallonia, Flanders). These standards aim to ensure the safety, quality, and compliance of installations. Whether for repairs, installations, or maintenance, it is essential to understand the legal and technical requirements related to plumbing work.
1. General Plumbing Standards
NBN EN 806: Drinking water installation
The NBN EN 806 standard establishes the general requirements for drinking water installations inside buildings. It is supplemented by the NBN D51-003 standard, which defines the technical criteria for domestic and industrial installations. This regulation applies throughout Belgium and ensures that the water distributed is safe and complies with health standards.
Equipment certifications
All equipment in direct contact with drinking water, such as water heaters , water softeners and faucets, must be certified in accordance with Belgian standards. These certifications guarantee that the materials used do not compromise water quality.
2. Water Evacuation: Standards and Obligations
NBN EN 12056 standard: Evacuation systems
The NBN EN 12056 series of standards covers the design and dimensioning of domestic wastewater and stormwater drainage systems. In particular, NBN EN 12056-3 deals with stormwater drainage systems, ensuring efficient management of water flows.
Separation of wastewater and rainwater
In the Walloon and Flemish regions, it is mandatory to separate the drainage of domestic wastewater from that of rainwater in new buildings. This measure aims to prevent flooding and protect the environment.

3. Safety and Materials Used
Safety standards
Plumbing installations must meet strict standards to prevent the risk of accidents. This includes:
- Water pressure regulation to prevent leaks or damage to pipes.
- Hot water temperature control to minimize the risk of scalding.
The materials and equipment used in the installations must comply with European ( EN ) and Dutch ( NEN ) standards. This includes pipes, fittings, taps and other components.

4. Approximate Price List for Plumbing Services
The cost of plumbing services can vary depending on the region, the complexity of the work, and the materials used. Here are some estimates of average rates in Belgium:
Type of intervention | Average Cost (€) |
---|---|
Repairing a simple leak | 75 – 150 € |
Installing a faucet | 100 – 200 € |
Installation of a water heater | 300 – 600 € |
Installing a water softener | 500 – 1,200 € |
Complete bathroom renovation | 1,500 – 3,000 € |
Unblocking pipes | 150 – 300 € |
Note: These prices are approximate and may vary by region and provider. It is recommended to request multiple devices to compare offers.
5. Why respect these standards?
Compliance with plumbing standards is essential for several reasons:
- Safety : Avoid accidents related to excessive pressure or dangerous temperatures.
- Water quality : Preserve the quality of drinking water and avoid contamination.
- Environmental Protection : Effectively manage wastewater and stormwater to minimize ecological impact.
- Legal Compliance : Ensure that installations comply with local regulations to avoid costly modifications or remediation work.
Conclusion
Plumber services in Belgium are subject to strict standards that vary by region (Brussels, Wallonia, Flanders). These regulations guarantee the safety, quality, and durability of plumbing installations. Whether you're a homeowner or a tenant, understanding these requirements is essential to avoid future problems and ensure your installations are legally compliant.