Sewer renovation

CIPP (cured-in-place pipe) is a technique in which an existing pipeline is fully renovated by pulling a liner through the old pipe. This liner is then inflated under air pressure against the wall of the existing sewer, after which a UV light train passes through the liner to cure it in a controlled manner through exposure to UV light.

This technique can be applied both horizontally and vertically. Moreover, it is a trenchless sewer rehabilitation technique, making it an ideal solution to avoid extensive excavation and demolition works.




1. Cleaning

High-pressure cleaning of the pipe to be rehabilitated

2. Inspection

Pipe inspection by robot inspection - Search for root ingrowths or similar

3. Milling

Milling work to free the pipe from protruding hindrances

4. Second cleaning

Second high-pressure cleaning of the pipe to be rehabilitated

5. Installation

Installation of the UV liner including curing

6. Final Pressure Test

Robot inspection of the renovated pipeline

Lateral connections

Once the liner has been correctly installed and cured, the restoration of the lateral connections to the liner can begin. These connections are measured in advance so that they can be reopened after the liner has been installed. The connections are finished in a watertight manner using a hat profile.