Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Blocked Drains Plumbers Sydney on 6 Oct 2025

When it comes to fixing damaged pipes, two common options are pipe relining or pipe replacement. Both approaches aim to restore the full function of your pipes, however there are some distinct differences you need to know.

Key Takeaways

  • Pipe relining is an economical and fast method for repairing damaged pipelines.
  • Linings made of CIPP are used for the relining of pipes.
  • Epoxy resin is used to line the inside areas of the pipe. This is cured to form a new inner lining for the old pipeline.
  • Relining pipe is time-efficient and cost-effective, and will last for up to 50 years.
  • Traditional pipe replacement involves digging up portions of property where pipes are located.
  • A replacement pipe may be needed to repair pipes that are severely damaged.
  • A new pipe installed via pipe replacement has a lengthy life span (75 -100 years).
  • Replacement of pipes can be costly and laborious.
  • The decision between pipe relining or pipe replacement will depend on the severity of damage that has been caused.

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

How do you define Pipe Relining?

Pipe relining or Cured-In-Place Pipe (CIPP) lining is a modern repair method that provides a cost-effective, fast solution for repairing damaged pipelines.

Here’s how it is done:

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

Benefits Pipe Relining

  • Time-efficient – It typically takes between 2 and three hours in order to finish the whole procedure, compared to excavating for several days with traditional methods of replacing pipes.
  • Cost-effective Since no excavation or removal is necessary for pipe relining It can save you nearly half of what you would pay for traditional repairs.
  • Durability – The lining made by pipe relining could last for 50 years!

Con’s of Pipe Relining

  • Not suitable for very damaged pipes. If there are major damages such as cracks or collapses or joints that are not aligned correctly 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 areas could contain collapsed pipes or extremely corrosion-prone ones, due to lack of maintenance or age.

The following steps are typical of traditional replacements for pipes:

  1. An excavation team digs up access to the damaged 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 put in the new pipeline on top of the one they had previously installed.

Pros and Cons of Pipe Replacement

  • Ideal for pipes that have been severely damaged If you have to replace pipes that have significant damage or corrosion, pipe replacement is the best solution.
  • Longer life span – The new pipeline that is installed by pipe replacement has a long lifespan (75 or 100 years) which makes it a great choice for homeowners in search of the best solution for their home.

Cons of Pipe Replacement

  • The work of excavation required for pipe replacement could be lengthy and expensive.
  • Time-consuming – Traditional pipe replacements can take a few weeks based on the extent of work and depth of excavations required.

Which one should you choose?

The choice between relining or replacing your pipes is mostly based on the degree of damage caused. If your pipes are suffering from small damages, like cracks or minor leaks, it is likely that relining is the best option, as it’s less costly and also quicker than traditional pipe replacements.

However, if there are serious damage, such as collapses or broken pipes and breaks, you must consider conventional pipe replacement, though 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

FAQs

What is the process of relining pipes?

Relining pipes is a procedure which involves the creation of a new pipe inside the existing damaged pipe. It is accomplished by inserting a flexible liner into the pipe that was damaged and placing it into place. Once cured, the new pipe does not have 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 and then replacing them with brand new ones. In contrast, pipe relining does not require excavation. Instead, it’s completed by utilizing technology that allows repair of pipelines without digging large areas of land.

Which is more cost-effective - liner relining or conventional pipe replacement?

Relining pipes typically cost less than the traditional methods of repair of pipelines because there aren’t any costs related to excavation, or other methods needed for removing and replacing old pipes.

Can all types of pipes be changed?

Certain types of pipes can be relined successfully. Your plumber must examine your pipe to determine if it’s possible to line your specific type of pipes. However, most contemporary pipes are lined with this technique.

How long will the process of relining pipes last?

The exact length of time needed for the procedure varies based on factors such as the location, the environment and type of damage; however the average Pipe Relining job usually takes 2-3 days based on the amount of metres require lining..

If you would like to steer clear of digging work and save cash in the process of restoring your damaged pipelines’ function to its maximum you should consider using our Blocked Drains Plumbers Sydney ‘s swift and efficient pipe relining services. Contact us!

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