Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Blocked Drains Plumbers Sydney on 19 Feb 2026

In the case of fixing damaged pipes, the two most common solutions are pipe relining and pipe replacement. Both solutions aim to restore the functionality of your pipes, however there are distinct differences you should be aware of.

Key Takeaways

  • Pipe relining is a cost-effective and swift process for restoring damaged pipelines.
  • The lining CIPP is employed in pipe relining.
  • Epoxy resin is used to line the inside parts of the pipe. The resin cures to create a new inner lining in the old pipeline.
  • Relining pipes is efficient, cost-effective, and will last for up to 50 years.
  • Traditional pipe replacement involves digging up sections of land where pipes are.
  • A replacement pipe may be needed for severely damaged pipes.
  • A new pipe installed via pipeline replacement has a longer lifespan (75 up to 100 years).
  • The cost of replacing pipes is high and lengthy.
  • The decision between pipe relining or pipe replacement depends on the degree of damage.

In this article, we’ll talk about pipe relining as opposed to. pipe replacement. Find out which one suits your needs more.

The term "pipe relining" is used to describe the process of repairing pipes.

Pipe relining, also known as Cured-In-Place pipe (CIPP) lining is a state of the art repair procedure that provides a cost-effective and quick solution to repair damaged pipelines.

Here’s how it works:

  1. A technician cleans the pipeline using high-pressure water jetting or mechanical cleaning.
  2. Then, they apply epoxy resin made from polyester or fiberglass liner inside the existing pipeline.
  3. The liner cures, creating a new inner lining in the old pipeline, which is just as robust as a new one.

Advantages Pipe Relining

  • Time-efficient: It generally takes only 2 to 3 hours of time to accomplish the entire procedure compared to excavating several days with traditional methods of replacing pipes.
  • Cost-effective since no excavation or removal is necessary for pipe relining This can help you save more than 50% of the cost you’d pay for traditional repairs.
  • Durability – The new lining that is created by pipe relining may last up to 50 years!

Pros and Cons of Pipe Relining

  • Not recommended for extremely damaged pipes - If you have significant damage such as cracks, collapses or misaligned joints in your sewer line, then pipe relining is not a possibility.

What exactly is Pipe Replacement?

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

The steps below are the most traditional pipe replacements:

  1. An excavation team digs access to the decayed underground pipe.
  2. The old pipeline is detached and dredged out, producing a lot debris that must be cleared away.
  3. They then install another pipeline in place of the one they had previously installed.

Pros and Cons of Pipe Replacement

  • Perfect for severely damaged pipes - When you need to replace pipes with significant damage or corrosion, pipe replacement is the best option.
  • Long lifespan – The new pipeline installed through pipe replacement has a lengthy lifespan (75 bis 100 years) making it an ideal alternative for homeowners seeking an option that is long-lasting.

Pros of Pipe Replacement

  • The work of excavation required for the replacement of pipes is costly and time-consuming.
  • The process is time-consuming. Traditional pipe replacements could take several weeks, based on the nature of the project and the depth of excavations needed.

Which one should you select?

The choice between either relining or repairing your pipes is mostly based on the degree of damage caused. If your pipes have minor issues like cracks, or minor leaks, it is likely that relining is an ideal option as it’s less costly and is also faster than replacement of pipes using traditional methods.

If there are major damages like collapses or breaks the best option is traditional pipe replacement although it will cost more 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 the process of relining pipes?

Pipe relining is a process which consists of creating a new pipe inside the existing damaged pipe. It is accomplished by inserting a flexible liner into the existing pipe, and then making it a permanent fixture. After it has been cured, the newly formed pipe is free of joints or seams that improve its structural integrity.

How does traditional pipe replacement differ from relining pipe?

Traditional replacement of pipes involves digging up and physically taking away old pipes, and then replacing them with brand new ones. The alternative, pipe relining does not require excavation. Instead, it’s completed using technology that allows for repairs to pipelines without digging huge areas of land.

Which option is less expensive: pipe relining or traditional replacement?

Relining pipes typically cost less than the traditional methods of pipeline repair as there are no expenses related to excavation or other procedures necessary for removing and replacing old pipes.

All kinds of pipes can be lined?

Certain types of pipes are relined effectively. Your plumber must examine your pipe to determine if it is feasible to line the particular kind of pipes. But, the majority of modern pipes can be lined using this procedure.

How long will the pipe relining process take?

The exact length of time needed for the process is dependent on various aspects like location, climate and the type of damage; however the typical Pipe Relining job usually takes 2-3 days, depending on how many metres require lining..

If you would like to steer clear of digging work and save your money while restoring your damaged pipelines’ full function take a look at our Blocked Drains Plumbers Sydney ‘s quick and efficient pipeline relining services. Contact us today!

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