Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Blocked Drains Plumbing Sydney on 31 Dec 2025

In the case of fixing damaged pipes, the two most common techniques are pipe relining as well as replacement of pipes. Both solutions aim to bring back the original function of your pipelines, but there are distinct differences you should be aware of.

Key Takeaways

  • Pipe relining is an economical and fast method for repairing damaged pipelines.
  • Linings made of CIPP are used for the relining of pipes.
  • Epoxy resin is utilized to line the inner areas of the pipe. This cures to create a new inner lining in the old pipeline.
  • Pipe relining is time-efficient, cost-effective, and can last for up to 50 years.
  • Traditional pipe replacement involves digging up sections of land in which pipes are situated.
  • Replacement of pipes may be required in the case of pipes that have been severely damaged.
  • A new pipe installed via pipeline replacement has a longer time span (75 up to 100 years).
  • Replacement of pipes can be costly and long-lasting.
  • The choice between pipe relining versus pipe replacement depends on the degree of damage that has been caused.

In this article, we’ll talk about pipe relining vs. pipe replacement and find the one that best suits your needs more.

What is Pipe Relining?

Pipe relining or Cured In-Place Pipe (CIPP) Lining is a state-of-the-art repair process which offers a low-cost and quick solution to repair damaged pipelines.

Here’s how it works:

  1. Technicians clean the pipeline by using high-pressure water jetting or mechanical cleaning.
  2. Then, they apply epoxy resin made of polyester or fiberglass liner inside the pipeline.
  3. The liner cures to form a brand new inner lining within the pipeline that’s as durable as a new one.

The advantages of Pipe Relining

  • The process is time-efficient, taking just 2 to 3 hours to complete the entire process, as opposed to digging for days for traditional pipe replacement methods.
  • Cost-effective Since there is no excavation or removal needed in the pipe relining process this method can save nearly 50% of the cost you’d pay for traditional repairs.
  • Durability – The new lining made by pipe relining could last for up to 50 years!

Con’s of Pipe Relining

  • Not suitable for severely damaged pipes - If there are serious damages like collapses, cracks, or joints that are not aligned correctly in your sewer line, then pipe relining may not be possible.

What exactly is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. The sections could include collapsed pipes or extremely corrosion-prone ones, due to the effects of time or neglect.

The following steps comprise most traditional replacements for pipes:

  1. A team of excavation workers digs access to the decayed underground pipe.
  2. The old pipeline has been removed and dug out producing much debris which needs to be removed.
  3. Then, they install an entirely new pipeline instead of the previous one.

Pros of Pipe Replacement

  • It is suitable for pipes with severe damage If you have to replace pipes that are suffering from significant corrosion or damage, pipe replacement is the ideal solution.
  • Long life – The brand new pipeline replaced with pipe is long-lasting (75 to 100 years) making it an ideal option for homeowners looking for a permanent solution.

Pros and Cons of Pipe Replacement

  • The work of excavation required to replace pipes can be time-consuming and expensive.
  • Long-lasting – Pipe replacements may take weeks depending on the scope of work and depth of excavations required.

Which option should you pick?

The choice between replacement or relining your pipes mostly is contingent on the extent of damage caused. If your pipes suffer from minor damage, such as cracks or leaks that are minor, replacing them is likely to be the best option, as it’s less expensive and faster than traditional replacements.

But if there are severe damage, such as collapses or broken pipes and breaks, you must consider replacing the pipe with a traditional method, even though it could be more costly and takes longer.

Pipe Relining Pipe Replacement
Procedure CIPP lining using epoxy resin Excavating and replacing the old pipeline
Pros Time-efficient- 2 to 3 hours to complete Suitable for severely damaged pipes
Cost-effective – Almost half of traditional costs. New pipeline lasts for 75 to 100 years
Durable – Lasts up to 50 years
Cons Not suitable for severely damaged pipes Costly
Time-consuming
When to choose Minor damages like cracks or minor leaks Severe damages like collapses or breaks

Frequently Asked Question

What is pipe relining?

Pipe relining is a procedure which consists of creating a new pipe inside the existing damaged pipe. This is done by inserting a flexible liner into the pipe that was damaged and curing it in place. Once cured, the new pipe has no joints or seams which improves its structural integrity.

How does the traditional replacement of pipes differ from pipe relining?

Traditional replacement of pipes involves physically taking away old pipes, before replacing them with new ones. The alternative, pipe relining doesn’t require excavation. Instead it’s carried out with the help of technology, which allows pipeline repair without digging up huge areas of land.

Which method is cheaper - the pipe relining method or traditional pipe replacement?

Relining pipelines typically costs less than traditional methods of repair to pipelines since there are no expenses related to excavation or other procedures that are required to remove and replace old pipes.

All kinds of pipes can be changed?

Not all types of pipes are relined in a successful manner. Your plumber will need to examine your particular situation to determine whether it’s possible to line your specific kind of pipes. However, most contemporary pipes are repaired with this procedure.

How long will the process of relining pipes last?

The exact duration of the process is dependent on various variables like the location, the environment and the type of damage; however the average Pipe Relining job usually takes 2-3 days based on the amount of metres require lining..

In conclusion, if you are looking to stay clear of invasive excavation work and save your money while restoring your damaged pipelines’ functionality, consider opting for our Blocked Drains Plumbing Sydney ‘s swift and efficient pipeline relining service. Contact us today!

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