A Guide To Know About Drain Relining

When it comes to the matter of drainage, broken drain pipes are among the most disruptive problem. Defective drain pipes hurt the ecosystem by contaminating the soil, in addition to being difficult to detect at first.

Pipes may now be repaired using the comparatively easier and less expensive process termed as drain relining, owing to today’s technology.

Earlier, the one and only option to repair broken drain pipes would have been to excavate and restore them, which was a time-consuming and costly procedure. This would be a pretty tricky procedure because the damaged pipes were frequently buried several metres underground. They are also occasionally buried beneath road infrastructure, sidewalks, and concrete structures.

What Is Drain Relining and How Does It Work?

Drain relining is a technique of fixing broken drainage pipes by inserting a new pipe, known as a lining, into an extant damaged pipe rather than excavating it. It’s a type of No-Dig solution that employs a drain tube that’s comparable to reinforced fibreglass.

Sewer relining could be used to repair joints that are open or seeping, as well as concentric or radial fissures caused by obstructions. It’s also good at preventing root infiltration, which is a problem with ancient clay drain pipes.

Drain patch repair is a method that is intimately allied to relining. Despite relining, when pre-shaped pipelining is utilised, a drain replacement is employed as the basic component. The patch is stretched out and injected with epoxy matrix before being placed around a tube packer device.

Drain repairs are very useful when only a small segment of the pipeline is broken, and a complete relining is not required.


The inspection of drainage pipes is the first step in the drain lining procedures. Unlike the traditional technique of drain restoration, which requires pipe construction, the drainage relining procedure employs CCTV survey monitoring. This examination pinpoints the exact location and degree of pipe corrosion.


The pipes are cleaned after the examination to eliminate any obstructions during the relining. The obstructions (for instance, tree trunks) are taken out with a mechanical cutter that can chop in concrete and steel. The pipe is then cleaned with higher moisture to remove any contaminants. This guarantees a strong attachment between the pipe and the wall.


The pipes are examined once more before the new drain liner is installed to verify that all possible incursions have been eliminated.


The technique of relining and also the precise quantity and kind of pipelining necessary is chosen at this point. This is due to the fact that various types of lining are employed in various scenarios. In circumstances where the tubes are twisted and manoeuvrability is essential, more pliable liners are employed.


There are two methods for installing the system. The first is using a technique called inversion. A resin is put into the drain lining and pressed periodically to ensure that it is equally dispersed throughout the chamber. It is then placed into the fractured pipe using either compressed balloons or water pressure to conform the liner to the walls of the pipe.

GFRP UV pipelining might also be used to install it. Using ropes and rollers, the pipelining is dragged into the damaged pipe.

Both procedures guarantee that the lining is precisely matched to the pipe’s surface. This ensures efficient drainage.


The curing procedure follows installation. This entails the resin solidifying in order to keep the liner in place. It can be allowed to recover on its own or accelerated by pouring hot water through the pipe when installing through inversion. GFRP UV pipes need UV irradiation to fully harden the lining.

FINAL RE-Examination

After the fault logs of the drainpipe has been repaired, the pipeline is subjected to a final check to verify it is in working order. Routine examination using CCTV sweeps and leak tests with leakage detection devices are part of this process.

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