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Steps of Repairing a Burst Trenchless Sewer Pipes

Burst sewer pipes are one of the most awful and dreary occurrences for any property. The wear and tear that comes with time renders even the most versatile sewer pipes to rust and corrode and eventually collapse. Collapsed sewer pipes release gaseous fumes and untreated water into the property and creates a risk of water-borne diseases. The first option is always to have them pulled out and replaced. Even then, the removal process is costly, messy and disruptive. That’s why trenchless sewer repair is such a convenient and necessary alternative. Pipe bursting is clear, simple and far less cheap than uprooting the damaged sewer pipes.


Step I. Inspection.

A Burst sewer pipe only indicates a breach and clogging. Therefore, it’s critical that the team can identify the extent of damage, the actual point of collapse, and the type of pipes to fit at the collapsed point. Trenchless sewer pipe bursting is quite a technical job that requires the intervention of professionals. Hiring an uncertified or unqualified contractor may affect your home insurance claim later on in case of injuries or damage. The inspection is done using a computer-controlled robotic camera that is run through the pipes. The crew then uses the video footage to determine the intervention.

Step II. Collapsed Pipe Drilling.

Running a pipe liner on a burst/collapsed pipe or pipes with a lateral joint system is not possible. Pipe bursting is the best system for running in a collapsed lateral if there still space to drag a cable through the burst pipe. This process involves pulling a newer, smaller pipe through the larger damaged one. This is done with the intention of opening up the collapsed area by fracturing the old pipe outwards. The first part involves digging access holes on both ends of the collapsed lateral pipe.

Step III. Fitting the New Pipe.

Nearly all lateral pipe bursting is done using small tonnage static pipes bursting. Smaller diameter pneumatic pipe bursting can also be used. The unit usually has a tonnage of about 30 to 40 tonnes. These portable pipe busters are usually run on portable hydraulic power packs or hydraulic excavation units. They are generally fit in secluded spaces that are accessible to excavation machines and crews to minimise damage and disruption. Most of the pipe bursting technology is flexible ad customizable to fit with the structure, depth and size of the collapsed lateral pipe.

Step IV. The Final Touch-Ups.

Pipe bursting techniques enable you to replace partially collapsed, structurally weak, severely offset pipes or pipes with massive root growth. This process requires little effort in cleaning, unlike the CIPP method. It just involves drilling a series of pits to allow access for the newly installed pipes and the pipe bursting machine. The newly fitted pipe is strung along with rods, chains or cables depending on size and make of the pipe. The pipe bursting head is usually 20% larger than the new pipe that is being installed.

Step V. Hydro Jetting.

Pipe cleaning is such a critical part of the repair work. This involves flashing down the debris, grease and scales in the inner lining of the newly pipe. The crew runs highly pressurised water through a specially designed nozzle. The water is usually jetted out at 3,500 PSI through the new sewer  pipe to clean out everything on its line of path. This amount of pressured water removes grease and mud. The crew comes with their water tank for flushing. Often it’s possible to achieve higher pressure levels, but those are often reserved for industrial and commercial piping systems.

Step VI. Covering up.

Pipe bursting involves minimal digging and disruption which still has to be cleared up. Once the new pipe has successfully been installed the next steps to verify that the installation did not  affect any other existing line within the area. It’s critical to identify all the public and private utilities that run in the area including water, other sewers, gas or electricity. In case you identify any damage or interference then you have to inform the respective authorities. All the dug up points have to be refilled and covered up.

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