Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Blocked Drains Plumbers on 4 Mar 2026

When it comes to fixing damaged pipes, the two most common methods are pipe relining and replacement of pipes. Both methods aim to restore the full function of your pipes, however they have marked differences that are important to understand.

Key Takeaways

  • Pipe relining is a cost-effective and quick method of repairing damaged pipelines.
  • The lining CIPP is employed in the relining of pipes.
  • Epoxy resin is utilized to line the inner parts of the pipe. The resin cures to create a new inner lining within the pipe.
  • Relining pipe is time-efficient and economical, and can last for up to 50 years.
  • The traditional method of replacing pipes is digging up portions of property in which pipes are located.
  • Replacement of pipes may be required for pipes that are badly damaged.
  • A new pipe installed via the replacement of a pipe has a long time span (75 -100 years).
  • Replacement of pipes can be costly and lengthy.
  • The decision between pipe relining or pipe replacement is based on the extent of damage that has been caused.

In this article, we’ll talk about pipe relining vs. pipe replacement and find out which one suits your requirements better.

Is Pipe Relining a thing?

Pipe relining, also known as Cured-In-Place pipe (CIPP) Lining is a modern repair method which offers a low-cost 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. They then apply epoxy resin made of fiberglass or polyester inside the pipeline.
  3. The liner gets cured, creating a new inner lining within the pipeline that’s as long-lasting as the new one.

Benefits Pipe Relining

  • Time-efficient: It generally takes just 2 to 3 hours to complete the entire procedure, compared to excavating for days in traditional pipe replacement techniques.
  • Cost-effective because no excavation or removal is required in pipe relining, it can save almost half of the amount you 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 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 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 team digs up access to the decayed underground pipe.
  2. The old pipeline has been removed and dredged out, producing a lot debris that requires disposing of.
  3. They then install a new pipeline in place of the previous one.

Pros and Cons of Pipe Replacement

  • Ideal for pipes that have been severely damaged In the event that you need to replace pipes with significant corrosion or damage, pipe replacement is the best option.
  • Longer life span – The new pipeline, which is replaced by pipe has a long life (75 bis 100 years) which makes it a great choice for homeowners in search of an ongoing solution.

Pros and Cons of Pipe Replacement

  • The work of excavation required for the replacement of pipes is lengthy and expensive.
  • The process is time-consuming. Traditional pipe replacements may take weeks depending on the nature of the project and the depth of excavations that are required.

Which option should you pick?

The decision on whether to go with the option of relining or replacing your pipes mostly is contingent on the level of damage caused. If your pipes suffer minor issues like cracks, or leaks that are minor, it is likely that relining is the best option, as it’s less costly and is also faster than replacement of pipes using traditional methods.

However, if there are serious damages like collapses or breaks the best option is traditional pipe replacement 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?

Relining a pipe is a process which consists of creating a new pipe within the existing damaged pipe. This is done by inserting a flexible liner inside the old pipe and placing it into place. After curing, the new pipe is free of joints or seams, which increases its structural strength.

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

Traditional pipe replacement involves excavating and physically dismantling old pipes, and then replacing them with brand new ones. In contrast, pipe relining doesn’t require excavation. Instead it’s carried out with the help of technology, which allows pipeline repair without digging up vast areas of land.

Which one is less expensive - pipe relining or traditional replacement?

Relining pipelines typically costs less than the traditional methods of repair of pipelines because there is no cost related to excavation and other techniques necessary for removing and replacing old pipes.

All kinds of pipes can be reflined?

Certain types of pipes can be relined successfully. The plumber must examine the situation to determine if it’s possible to line your particular type of pipes. But, the majority of new pipes may be fixed with this method.

How long will the process of pipe relining take?

The exact length of time needed for the procedure is contingent upon various factors such as location, environment and the kind of damage. However, the average pipe Relining job usually takes 2-3 days, depending on the number of metres require lining..

If you are looking to stay clear of invasive excavation work and save money in the process of restoring your damaged pipelines’ performance to their fullest Consider utilizing our Sydney Blocked Drains Plumbers ‘s swift and efficient pipeline relining services. Contact us today!

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