Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Blocked Drains Plumbers on 21 Jul 2026

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

Key Takeaways

  • Relining pipes is an affordable and fast method for repairing damaged pipelines.
  • Linings made of CIPP are used for pipe relining.
  • Epoxy resin is used to line the inner parts of the pipe which is cured to form a new inner lining inside the pipeline.
  • Pipe relining is time-efficient, economical, and can last for up to 50 years.
  • The traditional method of replacing pipes is digging up areas of the property in which pipes are situated.
  • Pipe replacement may be necessary for severely damaged pipes.
  • A brand new pipeline that is installed by the replacement of a pipe has a long time span (75 or 100 years).
  • Replacement of pipes is expensive and long-lasting.
  • The decision between pipe relining or pipe replacement depends on the level of damage caused.

In this article, we’ll go over pipe relining in comparison to. 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 fast solution for repairing damaged pipelines.

Here’s how it works:

  1. A technician cleans the pipeline using high-pressure water jetting or mechanical cleaning.
  2. They then apply epoxy resin made of fiberglass or polyester liner to the existing pipeline.
  3. The liner is cured and forms a new liner within the pipeline that’s as strong as a brand new one.

Advantages Pipe Relining

  • Time-efficient – It usually takes between 2 and 3 hours of time to accomplish the whole procedure compared to excavating days in traditional pipe replacement techniques.
  • Cost-effective because no excavation or removal is required in pipe relining It can save you nearly 50% of the cost you’d pay for traditional repairs.
  • Durability – The new lining formed by pipe relining can last for up to 50 years!

Con’s of Pipe Relining

  • Not suitable for very damaged pipes. If there are major damages such as cracks, collapses or misaligned joints in your sewer line, then pipe relining may not be possible.

What is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. These sections may include damaged pipes, or highly damaged ones caused by the effects of time or neglect.

The steps below are the most traditional replacements for pipes:

  1. An excavation team digs up access to the deteriorated underground pipe.
  2. The old pipeline is detached and dug out, creating a lot of debris that needs to be disposed of.
  3. Then, they install a new pipeline in place of the previous one.

Pros of Pipe Replacement

  • Suitable for severely damaged pipes Ideal for severely damaged pipes – If you must replace pipes with significant damage or corrosion, pipe replacement is the best option.
  • Longer life span – The new pipeline that is installed by pipe replacement has a long life (75 to 100 years) making it an ideal choice for homeowners in search of the best solution for their home.

Pros of Pipe Replacement

  • Extraction work that is costly for the replacement of pipes is long and costly.
  • It is time-consuming. Pipe replacements can take weeks depending on the nature of the project and the depth of excavations that are required.

Which one should you select?

The choice between replacement or relining your pipes mostly depends on the level of damage caused. If your pipes suffer from small damages, like cracks or leaks that are minor, relining would probably be the better option since it’s less costly and also quicker than replacement of pipes using traditional methods.

However, if there are serious damage, such as collapses or broken pipes it is recommended to consider traditional pipe replacement although it will cost more and will take 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

FAQ

What is the process of relining pipes?

Pipe relining is a process that involves creating a new pipe inside an existing damaged pipe. This is done by inserting a liner that is flexible into the pipe that was damaged and placing it into place. After it has been cured, the newly formed pipe has no joints or seams, which increases its structural integrity.

What does traditional pipe replacement differ from pipe relining?

Traditional replacement of pipes involves physically dismantling old pipes, after which they are replaced with new ones. However, pipe relining doesn’t require excavation; instead it’s accomplished using technology that allows for repairs to pipelines without digging vast areas of land.

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

Relining pipelines typically costs less than the traditional methods of repair of pipelines because there aren’t any costs related to excavation or other methods required for the removal and replacement of old pipes.

Can all kinds of pipes be reflined?

Certain types of pipes are relined in a successful manner. Ultimately, your plumber will have to inspect your particular situation to determine whether it’s feasible to line your specific kind of pipes. However, the majority of current pipes could be repaired with this method.

How long does the pipe relining process take?

The precise time needed for the process is dependent on various variables like location, environmental conditions and type of damage; however the typical Pipe Relining task usually takes between 2 and 3 days, depending on how many meters need to be lined..

In the end, if you wish to avoid digging works and save money in the process of restoring your damaged pipelines’ function to its maximum you should consider using our Sydney Blocked Drains Plumbers ‘s fast and effective pipeline relining services. Contact us today!

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