Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Blocked Drains Plumbers Sydney on 6 Oct 2025

In the case of fixing damaged pipes, two popular techniques are pipe relining as well as pipe replacement. Both of these methods are designed to restore the full function of your pipes, however they differ in a way that must be aware of.

Key Takeaways

  • Relining pipelines is a cost-effective and fast method for repairing damaged pipelines.
  • Linings made of CIPP are used for pipe relining.
  • Epoxy resin is used to line the internal parts of the pipe. The resin sets to create a brand new inner lining within the old pipeline.
  • Pipe relining is time-efficient, cost-effective and lasts up to 50 years.
  • Traditional pipe replacement involves excavation of areas on the property in which pipes are situated.
  • Pipe replacement may be necessary in the case of pipes that have been severely damaged.
  • A brand new pipeline that is installed by the replacement of a pipe has a long life span (75 up to 100 years).
  • Replacement of pipes can be costly and time-consuming.
  • The decision between pipe relining and replacement is based on the extent of damage.

In this article, we’ll talk about pipe relining and. replacing pipes and figure out which one will suit your needs more.

What is Pipe Relining?

Pipe relining, also known as Cured-In-Place pipe (CIPP) lining is a state of the art repair procedure which offers a low-cost and swift solution for restoring damaged pipelines.

Here’s how it will work:

  1. Technicians clean the pipeline with high-pressure jetting or mechanical cleaning.
  2. Then, they place epoxy resin made from polyester or fiberglass liner inside the existing pipeline.
  3. The liner is cured by forming a new liner within the old pipeline that’s as strong as a brand new one.

Pros of Pipe Relining

  • Time-efficient: It generally takes about 2 to 3 hours to complete the entire process compared with excavating for several days with traditional methods of replacing pipes.
  • Cost-effective - Because no excavation or removal is required in pipe relining, it can save almost half of the price you’d pay for traditional repairs.
  • Durability – The lining created through pipe relining can last for up to 50 years!

The cons of Pipe Relining

  • Not recommended for extremely damaged pipes - If there are serious damages such as cracks or collapses or joints that are misaligned within your sewer line then pipe relining is not a possibility.

What is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. The areas may contain damaged pipes, or highly damaged ones due to the effects of time or neglect.

The following steps comprise most traditional pipe replacements:

  1. An excavation crew digs access to the decayed underground pipe.
  2. The pipeline was ripped off and dug out producing much debris that must be cleared away.
  3. Then, they install the new pipeline on top of the previous one.

Pros of Pipe Replacement

  • Ideal for pipes that have been severely damaged If you have to replace pipes that are suffering from significant damage or corrosion, pipe replacement is the best solution.
  • Long lifespan – The new pipeline, which is replaced by pipe has a lengthy lifespan (75 to 100 years) making it an ideal choice for homeowners in search of an option that is long-lasting.

Pros of Pipe Replacement

  • The work of excavation required to replace pipes can be lengthy and expensive.
  • Long-lasting – Pipe replacements may take weeks depending on the size of the work and the extent of excavation required.

Which one is best for you?

The choice between either relining or repairing your pipes is largely based on the level of damage caused. If your pipes suffer from minor damage, such as cracks or leaks of a minor size, the relining process is probably a more appropriate choice since it’s less costly and is also faster than replacement of pipes using traditional methods.

But if there are severe injuries, like breaks or collapses, then you should consider an alternative to replacing your pipe, although it will cost more and 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

Common Questions and Answers

What is pipe relining?

Pipe relining is a procedure that involves creating a new pipe within the existing damaged pipe. This is done by inserting a flexible liner in the pipe that was damaged and placing it into place. After it has been cured, the newly formed pipe is free of joints or seams that improve its structural strength.

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

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

Which option is less expensive: liner relining or conventional pipe replacement?

Relining pipelines typically costs less than traditional methods for repair to pipelines since there aren’t any costs related to excavation, or other methods that are required to remove and replace old pipes.

Can all kinds of pipes be relined?

Not all types of pipes are relined effectively. Your plumber will have to inspect your pipe to determine if it’s feasible to line the particular kind of pipes. However, most contemporary pipes are repaired with this method.

How long does the process of pipe relining take?

The exact time required for the process is dependent on various factors such as location, environment and the kind of damage. However, the average pipe Relining job typically takes around 2 days, depending on how many metres require lining..

If you wish to avoid digging work and save your money while restoring your damaged pipelines’ performance to their fullest, consider opting for our Blocked Drains Plumbers Sydney ‘s swift and efficient pipe relining solutions. Contact us today!

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