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  • The 4 Common Types of Trenchless Sewer Pipe Repair Methods

    plumberbondi Cured-in-place-pipe

    There are many trenchless sewer pipe repair solutions practised by contractors worldwide. We will focus more on the popular and effective methods that are applied in pipe restoration. Trenchless application in repairing pipes has become such a phenomenon due to its ability to cause negligible damage to the work site. Another feature that makes trenchless technology better than a typical pipe repair extraction is the low turnaround time to complete the project. There are other reasons why trenchless methods are currently the best in refurbishing pipes. We will focus more on its different branching methods in this article. Check the list to find out the most common and widely used trenchless pipe repair methods used today.

    1. Cured-in-place-pipe (CIPP)

    CIPP is a pipe rehabilitation method which means pipes are repaired through insertion of pipe liners. In the CIPP method, a resin liner or resin liners are introduced into the current pipeline. The resin liner is bonded or mixed with the old pipes. This allows the resin liner to turn into the new main pipeline. There is no need to excavate the old pipeline since the resin liner is just inserted or pushed into the sewer system. Little digging is used in CIPP and this makes it very favourable for homeowners who don’t want to have their property damaged. Before the resin liner is placed in the pipeline, the current pipes must be first be cleaned with the use of a hydro jet. The composition of the resin liner isn’t balanced which is why it’s inserted inside a bladder. The bladder carries the resin liner into the pipe section that needs to be relined. Once in place, the bladder is expanded to stick the resin liner to the pipe lining. Hot water and steam is applied to hasten the curing or hardening process.

    1. Pull-in-place lining

    Pull-in-place lining is actually just the same with CIPP. The only thing that diversifies the two is the way the pipes are integrated into the system. CIPP requires only one access pit or excavation of the resin liner while there are two access pits for the pull-in-place lining. The pull-in-place method pulls the resin liner into the pipeline with a winch machine which is totally different compared to CIPP where the pipes are pushed into one access point.

    1. Pipe bursting

    Pipe bursting is much different than the two methods prior since it’s more of a replacement than rehabilitation. Many people find it odd that a pipe can be repaired through bursting but the destruction of the pipes is just part of the process. Besides, the pipes busted are the old pipes. The new pipes are pulled into the pipeline after the old pipe line is wiped out. A PVC or HDPE are usually applied in pipe bursting since these materials have a good mix of durability and flexibility.   

    1. Moling

    This is another pipe replacement method just like pipe bursting. A digging machine creates a direct underground path to the pipeline. This is less destructive since the pipes don’t need to be hauled out or in the sewer system.