SECTIONAL REPAIR
The short liner repair system is a ‘no-dig’ application suitable for sectional repair of defective sewer pipes. A renovation packer carrying resin-based fibreglass matting is pushed or pulled to the point of repair, of which the exact position is determined beforehand by CCTV inspection. Once the correct position is reached, the packer is inflated causing the packer to expand, impregnating the fibreglass mat to the host pipe. A permanent bond between the fibreglass mat and the host pipe wall is created. After the resin cures, the packer is deflated and removed from the pipe. The repair covers the full area of the compromised pipe section without obstructing the service flow. This ‘pipe-in-pipe’ system becomes integrated with the host pipe and fully meets the hydraulic requirements. The repaired pipe section is inspected using CCTV camera and a leakage test performed.
LATERAL CONNECTION REPAIR
Lateral connection repair is a sectional repair method for defective sewer pipes and is used in ‘no-dig’ applications. A packer carrying a resin-wetted ‘hat profile’ is pushed pulled to the point of repair, of which the exact position is determined beforehand by CCTV inspection. When positioned at the point of repair, the packer is inflated and the retracted finger extends towards the lateral junction and is forced against the host pipe of the junction. Resin migrates into the defective areas creating a permanent bond between the fibreglass and the host pipe. The hat profile seals the space between the two pipe systems with its rim, while the lateral connection liner in the main pipe functions as a short liner. Following cure of the resin, the packer is deflated and the packer removed from the pipe. The repaired section is inspected and using CCTV camera and a leakage test performed.