Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Blocked Drains Plumbers on 21 Jul 2026

When it comes to fixing damaged pipes, the two most common solutions are pipe relining and pipe replacement. Both solutions aim to restore the function of your pipelines, but there are some distinct differences must be aware of.

Key Takeaways

  • Pipe relining is a cost-effective and swift process for restoring damaged pipelines.
  • Linings made of CIPP are used for pipe relining.
  • Epoxy resin is utilized to line the inner parts of the pipe. The resin is cured to form a new inner lining within the pipeline.
  • Relining pipes is efficient, cost-effective and lasts for up to 50 years.
  • Traditional pipe replacement involves digging up areas of the property in which pipes are situated.
  • The replacement of pipes is often necessary to repair pipes that are severely damaged.
  • A new pipe installed via pipe replacement has a long duration (75 to 100 years).
  • Replacement of pipes can be costly and laborious.
  • The choice between pipe relining or pipe replacement will depend on the severity of damage.

In this article, we’ll talk about pipe relining as opposed to. replacing pipes and figure out which one suits your requirements more.

Is Pipe Relining a thing?

Pipe relining or Cured-In-Place Pipe (CIPP) Lining is a cutting-edge repair method that provides a cost-effective, rapid solution for the repair of damaged pipelines.

Here’s how it is done:

  1. A technician cleans the pipeline using high-pressure water jetting or mechanical cleaning.
  2. Then, they place epoxy resin made from fiberglass or polyester liner in the existing pipeline.
  3. The liner gets cured by forming a new lining in the old pipeline that’s just as strong as a brand new one.

Advantages Pipe Relining

  • Time-efficient: It generally takes only 2 to three hours in order to finish the whole procedure, compared to excavating for days in traditional pipe replacement methods.
  • Cost-effective since there is no excavation or removal necessary for pipe relining, it can save almost half of the amount you be paying for conventional repairs.
  • Durability – The new liner formed by pipe relining can last for up to 50 years!

Con’s of Pipe Relining

  • Not recommended for extremely damaged pipes - If you have significant damage such as cracks, collapses, or joints that are not aligned correctly within your sewer line then pipe relining might not be feasible.

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 damaged pipes, or highly damaged ones due to negligence or aging.

The steps below are the most traditional pipe replacements:

  1. An excavation team digs access to the degraded underground pipe.
  2. The old pipeline has been removed and dug out producing much debris that requires disposing of.
  3. Then, they construct a new pipeline in place of the one they had previously installed.

Pros of Pipe Replacement

  • It is suitable for pipes with severe damage If you have to replace pipes with significant damage or corrosion, pipe replacement is the most effective option.
  • Long lifespan – The new pipeline replaced with pipe has a lengthy lifespan (75 bis 100 years) which makes it a great solution for homeowners who want an option that is long-lasting.

Pros of Pipe Replacement

  • Costly – Excavation work requred for pipe replacement could be costly and time-consuming.
  • Time-consuming – Traditional pipe replacements can take a few weeks based on the extent of work and the depth of excavations needed.

Which one should you choose?

The choice between the option of relining or replacing your pipes mostly is contingent on the level of damage caused. If your pipes suffer small damages, like cracks or minor leaks, relining would probably be the best option, as it is less costly as well as quicker than traditional replacements.

However, if you have severe injuries, like breaks or collapses it is recommended to consider an alternative to replacing your pipe, although it might 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

FAQ

What is pipe relining?

Relining pipes is a procedure that creates a brand new pipe inside the existing damaged pipe. It is accomplished by inserting a flexible liner in the old pipe and then making it a permanent fixture. Once it is cured, the new pipe is free of joints or seams, which enhances its structural integrity.

How does traditional pipe replacement differ from relining pipe?

Traditional pipe replacement involves{ excavating and| digging and|| digging up and} physically dismantling old pipes then replacing them with new ones. However, pipe relining isn’t a requirement for excavation. Instead it’s done by utilizing technology that allows pipeline repair without digging up vast areas of land.

Which one is less expensive - liner relining or conventional pipe replacement?

Relining pipelines typically costs less than the traditional methods of pipe repair because there are no costs associated to excavation and other techniques needed for removing and replacing old pipes.

All kinds of pipes can be relined?

Certain types of pipes can be relined successfully. The plumber will need to examine your particular situation to determine whether it’s possible to line your specific kind of pipes. However, the majority of modern pipes can be relined using this technique.

How long does the process of relining pipes take?

The exact length of time needed for the process is dependent on various factors such as the location, the environment and the type of damage. However, the average Pipe Relining job usually takes 2-3 days based on the amount of metres require lining..

In conclusion, if you want to avoid invasive excavation work and save money while restoring damaged pipelines’ functionality you should consider using our Sydney Blocked Drains Plumbers ‘s swift and efficient pipe relining services. Contact us today!

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