UV Liner Rehabilitation
Trenchless underground pipe rehabilitation — the innovative solution for modern infrastructure with minimal impact on the environment and community.
Trenchless Sewer Rehabilitation
Sewer rehabilitation using UV-cured liner is an innovative and modern solution that enables pipe renovation without excavation, significantly reducing the impact on the environment, traffic and surrounding infrastructure.
UV technology ensures rapid, controlled polymerization of the liner, guaranteeing uniform and durable curing along the entire pipe length. The process is carefully monitored and documented to ensure quality and reliability.
This technology gives us the ability to intervene in dense urban areas, historic zones or spaces where excavation is impractical or extremely costly.
Rehabilitation Process Step by Step
Each stage is carried out by certified specialists using state-of-the-art equipment and rigorous documentation.
Access Preparation
For liner installation inside the pipes, access is typically achieved through existing manholes. Where manholes are absent, point interventions are performed through temporary excavations or launch pits, strategically placed near connections or critical points along the pipe route.
Pipe Cleaning
Cleaning is carried out using a vacuum/jetting truck equipped with a high-pressure installation and water recycling system. It uses standard or rotary nozzles mounted on a trolley adapted to the pipe diameter, which advances automatically and completely removes deposits and obstructions.
Video Inspection & Repairs
After cleaning, the pipe is video-inspected to verify its condition. Any defects — cracks or holes — are repaired manually by authorized personnel or, where applicable, using specialized robots, ensuring an optimal surface for liner application.
Liner Installation
The liner is drawn into the pipe by a winch that maintains constantly controlled speed and force. Once fully positioned, both ends of the liner are sealed with metallic end caps inflated with compressed air, preparing the surface for polymerization.
UV Polymerization
A chain equipped with UV lamps is introduced inside the liner to cure it. UV polymerization ensures uniform, rapid and controlled hardening along the entire pipe length, resulting in a durable and resistant structure.
Verification & Acceptance
The rehabilitated section undergoes a final video inspection, followed by washing, disinfection and pressure tests in accordance with applicable standards. This ensures safe and durable long-term pipe operation.
Why Do We Use This Technology?
Efficiency and responsibility towards the community — the principles guiding our adoption of UV Liner technology.