Types of Sewer Line Repair Technology

Putting resin on liner
Putting resin on the Formadrain liner

Sewer line repair technology is actually an entire family of methods, materials and equipment that allow technicians to lay, repair and maintain pipes with a minimal amount of digging. Some technologies actually require no digging at all. There is a pipe lining systems technology option available for almost every type of plumbing or piping job.

  • Pipe Bursting: Pipe bursting can be used to completely replace an existing sewer line. With this process, a small opening is made at each end of the pipe to be replaced. Once the openings are made into the pipe to be replaced, a thick cable is fed through one end and at the other end, a spear shaped tool called a bursting head is attached. A new PVC or HDPE section of pipe is attached to the other end. Then, as the bursting head is pulled through the pipe, it ‘bursts’ the old pipe while simultaneously replacing it with the new pipe. This process is used with the existing pipe is in too bad of a condition to be simply lined using the CIPP process.
  • Relining using CIPP (Cured in Place Pipe): CIPP, or cured-in-place-pipe, is a type of technology that can quickly and efficiently repair sections of pipe that are still in fairly good condition but are in need of a little added strength. With this process, the pipe is simply relined using a seamless PVC infused liner to seal in all the voids and cracks contained in the pipe. Before the new liner is installed, the old pope Is cleaned using a process known as hydro jetting. This process removes loose debris from the pipe. The liner is sealed in pace using hot, high pressure steam that is run through the liner with a bladder. This process cannot be used for pipes that are in a weakened or unstable condition.
  • Moling: The moling process is used to lay down new pipes. Before, trenches would have to be dug in order to lay new pipe. This process damages the landscape and can be tricky if a building or road lays in the proposed path of the pipe. With moling, a special machine that is driven pneumatically is driven through the soil on the proposed path of the pipe. The mole is a steel cylinder that is typically about 60 cm long and 6 cm in diameter. Once the hole is created by the mole, putting the pipe in place is simple.
  • Pull-in-place Lining: The pull-in-place lining process uses a fiberglass and resin liner to line an existing pipe that is cracked or partially gapped. Two small holes need to be dug for this process, one before and one after the area that needs to be fixed. The new liner is pulled into place using a wench and is cured with either heat or steam or at ambient temperature.
  • Inversion Lining: Inversion lining can be used to seal a pipe that is in solid condition but may have a few gaps or cracks. With this process, a small hole is dug near to the area where the inversion liner needs to be placed. The liner is typically made out of a felt tube and resin. It is a smooth and jointless lateral that is strong and durable.
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2 Responses

  • I didn’t know that relining could be used to reinforce your pipes. My husband and I have been having some issues with our sewer. Maybe we should see if our pipes need relining.

  • Thanks for helping me learn more about different technology that could be used to repair a sewer line. I’m glad that you mentioned in the article that there is a moling process that is done to lay down new pipes and a machine is used and driven through the soil. I’m kind of interested to know if these machines could come in different sizes depending on the pipe that needs to be installed.

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