Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Blocked Drain Plumbing on 30 Mar 2026

In the case of fixing damaged pipes, the two most common methods are pipe relining and pipe replacement. Both of these methods are designed to restore the functionality of your pipelines, but there are some distinct differences must be aware of.

Key Takeaways

  • Relining pipelines is a cost-effective and swift process for restoring damaged pipelines.
  • CIPP lining is used in pipe relining.
  • Epoxy resin is utilized to line the inner parts of the pipe. The resin is cured to form a new inner lining inside the old pipeline.
  • Relining pipelines is time-efficient, cost-effective, and can last up to 50 years.
  • The traditional method of replacing pipes is digging up portions of property where pipes are located.
  • A replacement pipe may be needed in the case of pipes that have been severely damaged.
  • A brand new pipeline that is installed by pipeline replacement has a longer life span (75 to 100 years).
  • Replacement of pipes is expensive and long-lasting.
  • The decision between pipe relining and replacement depends on the level of damage that has been caused.

In this article, we’ll talk about pipe relining and. pipe replacement and find out which option will meet your needs better.

Is Pipe Relining a thing?

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 is done:

  1. A technician cleans the pipeline with high-pressure water jetting or mechanical cleaning.
  2. Then, they put epoxy resin made from fiberglass or polyester liner to the existing pipeline.
  3. The liner gets dried to form a brand new inner lining in the old pipeline that’s just as strong as a brand new one.

Pros of Pipe Relining

  • Time-efficient: It generally takes just 2 to three hours in order to finish the whole procedure, compared to excavating for many days using traditional pipe replacement techniques.
  • Cost-effective since there is no excavation or removal required in pipe relining this method can save nearly 50% of the cost you’d pay for traditional repairs.
  • Durability – The new lining formed by pipe relining can last for 50 years!

The cons of Pipe Relining

  • Not suitable for the most damaged pipes. If you have significant damage like collapses, cracks, or joints that are misaligned within your sewer line then pipe relining could not be possible.

What exactly is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. These areas could contain broken pipes, or very corroded ones either from lack of maintenance or age.

The following steps make up the majority of traditional replacements for pipes:

  1. An excavation crew digs 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 the new pipeline on top of the previous one.

Benefits of Pipe Replacement

  • Perfect for severely damaged pipes If you have to replace pipes that are suffering from significant corrosion or damage, pipe replacement is the best option.
  • Longer life span – The new pipeline that is installed by pipe replacement has a lengthy lifespan (75 up to 100 years) making it an ideal option for homeowners looking for an ongoing solution.

Cons of Pipe Replacement

  • Extraction work that is costly for the replacement of pipes is time-consuming and expensive.
  • Long-lasting – Pipe replacements could take several weeks, based on the scope of work and the depth of excavations needed.

Which option should you pick?

The decision on whether to go with either relining or repairing your pipes mostly is contingent on the extent of damage caused. If your pipes suffer from minor damage, such as cracks or minor leaks, replacing them is likely to be a more appropriate choice since it is less costly as well as quicker than traditional replacements.

However, if there are serious damages like collapses or breaks it is recommended to consider replacing the pipe with a traditional method, even though it may be more expensive 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 the process of relining pipes?

Relining of pipes 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 old pipe and the process of curing it. After it has been cured, the newly formed pipe has no joints or seams that improve its structural integrity.

What is the difference between traditional pipe replacement and differ from relining pipe?

Traditional pipe replacement involves physically removing old pipes then replacing them with new ones. In contrast, pipe relining doesn’t require excavation. Instead it’s carried out by utilizing technology that allows repair of pipelines without digging large areas of land.

Which is more cost-effective - pipe relining or traditional replacement?

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

Can all types of pipes be reflined?

Not all types of pipes are relined in a successful manner. In the end, your plumber should examine the situation to determine if it’s possible to line the particular kind of pipes. But, the majority of contemporary pipes are fixed with this technique.

How long will the process of pipe relining take?

The exact duration of the procedure varies based on variables like location, environment and type of damage. However the typical pipe Relining process typically takes about 2 days based on the amount of 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’ performance to their fullest you should consider using our Sydney Blocked Drain Plumbing ‘s rapid and effective pipeline relining service. Contact us!

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