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We often expect that sewer pipelines will remain undamaged forever. But just like with everything, our sewer lines will also fail. If this happens, it’s best to call a professional plumber as soon as possible to assess the problem and how it can be solved. If possible, you’ll want to choose and try sewer pipe relining than replacement.

What is Sewer Pipe Relining?

As opposed to sewer pipe replacement, pipe relining simply inserts a pipe liner inside the existing pipeline. It’s then filled with epoxy resin, which is then cured to mould to the current pipe. Because of that, it’s also known as cured-in-place pipelining (CIPP).

Since there’s no or little requirement for excavation, it’s also known as trenchless technology.

This is often the choice of many home and business owners as it’s easier to do with quick turnaround time and less to no excavation required.

In Australia, a sewer pipe relining cost would be roughly around $2000 to $4000, depending on the size of the pipe that needs to be fixed, the extent of the damage it has, and the type of sewer pipe you have.

For the best idea of how much you’ll be spending, ask your plumber for a quote.

Remember, any pipe replacement, repair, or installation can only be done by a licensed and professional plumber in Australia. So, never attempt to do a relining task on your own, most especially a pipe replacement (if the need arises).

What to Expect During Sewer Pipe Relining

So, what happens during a sewer pipe relining job?

The first thing a professional plumber would do is to assess the situation. They often do this with the help of a small remote camera that they would attach to a piece of auger-like equipment and check the condition of the pipe.

Most pipelines are viable for pipe relining, but there are some instances when that is not possible. For example, the pipe might have completely collapsed or has been crushed. Extremely disjointed pipelines can’t also receive such treatment, so in these cases, your plumber would propose another solution. But if your sewer pipeline is practically in one piece and has a continuous run, they would proceed with the relining process.

Here’s the process:

  1. The plumbers would start by cleaning the pipe, essentially making it ready for the epoxy resin. They would have to remove anything sticking to the lining of the pipe and make it as close to its original diameter when it was installed. To clean the sewer line, they would often use water jetting techniques as the pressure could remove any debris that needs to be removed.
  2. Again, the team will have to check if the pipe is ready for relining through a remote camera inspection.
  3. After scouring the interior of the sewer line, they would insert the soft liner into the pipe. The liner is made from any suitable material, such as fibreglass or polyester. Along with the liner is an inflatable bladder that will be inserted within the hollow part of the liner.
  4. Once everything is in place, they would inflate the bladder, ensuring that the liner is forced onto the inner lining of the pipe. The bladder will keep the liner in place as it cures.
  5. Curing often takes the longest time, so it may take 24 hours or maybe a couple of days or so until the lining is completely cured and hard. Sometimes, they would use hot water to speed up the process, and then follow up with UV radiation.
  6. The bladder will be deflated and pulled out from the pipe. Then, your plumber will do a final remote camera inspection to ensure that everything is in place.