Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Local Sydney Blocked Drains on 15 Feb 2026

In the case of fixing damaged pipes, two popular solutions are pipe relining and replacement of pipes. Both of these methods are designed to bring back the original function of your pipelines, but there are some distinct differences you should be aware of.

Key Takeaways

  • Relining pipelines is a cost-effective 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 cures to creates a new inner lining within the pipe.
  • Pipe relining is time-efficient, economical, and can last for up to 50 years.
  • Traditional pipe replacement involves digging up sections of land where pipes are.
  • The replacement of pipes is often necessary for severely damaged pipes.
  • A new pipe installed via pipe replacement has a long life span (75 -100 years).
  • Pipe replacement is costly and lengthy.
  • The decision between pipe relining versus pipe replacement depends on the level of damage.

In this article, we’ll discuss pipe relining as opposed to. 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 procedure which offers a low-cost and rapid solution for the repair of damaged pipelines.

Here’s how it works:

  1. A technician cleans the pipeline with 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 by forming a new lining inside the old pipeline that’s as durable as a new one.

Advantages Pipe Relining

  • Time-efficient – It usually takes just 2 to three hours in order to finish the entire procedure compared to excavating days in traditional methods of replacing pipes.
  • Cost-effective Since no excavation or removal is necessary for pipe relining It can save you nearly half of the price you’d pay for traditional repairs.
  • Durability – The new liner created through pipe relining can last for up to 50 years!

Con’s of Pipe Relining

  • Not suitable for the most damaged pipes - If there are major damages such as cracks, collapses or misaligned joints in your sewer line, then pipe relining is not a possibility.

What 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 due to lack of maintenance or age.

The following steps make up the majority of traditional pipe replacements:

  1. An excavation team digs up access to the decayed underground pipe.
  2. The pipeline that was previously in use is detachment and dug out producing much debris which needs to be removed.
  3. Then, they install a new pipeline in place of the previous one.

Pros and Cons of Pipe Replacement

  • Ideal for pipes that have been severely damaged - When you need to replace pipes with severe corrosion or damage, pipe replacement is the best solution.
  • Longer life span – The new pipeline that is installed by pipe replacement has a lengthy lifespan (75 bis 100 years) making it an ideal choice for homeowners in search of an option that is long-lasting.

Cons of Pipe Replacement

  • Extraction work that is costly to replace pipes can be costly and time-consuming.
  • The process is time-consuming. Traditional pipe replacements could take several weeks, based on the scope of work and the depth of excavations that are required.

Which one should you choose?

The decision on whether to go with the option of relining or replacing your pipes is mostly based on the amount of damage caused. If your pipes have minor issues like cracks, or minor leaks, then the relining process is probably an ideal option as it is less costly and faster than replacement of pipes using traditional methods.

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 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

Frequently Asked Questions

What is pipe relining?

Relining pipes is a process that involves creating a new pipe inside an existing damaged pipe. It is accomplished by inserting a flexible liner into the existing pipe, and then placing it into place. Once it is cured, the new pipe does not have joints or seams that improve its structural integrity.

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

Traditional replacement of pipes involves excavating and physically cutting away the old pipe after which they are replaced with new ones. However, pipe relining doesn’t require excavation. Instead it’s accomplished with the help of technology, which allows pipe repair without digging up vast areas of land.

Which option is less expensive: liner relining or conventional pipe replacement?

Relining pipes typically cost less than traditional methods of repair of pipelines because there is no cost related to excavation and other techniques required for the removal and replacement of old pipes.

Can all types of pipes be changed?

There are a few types of pipes that are relined effectively. The plumber should examine your particular situation to determine whether it is feasible to line your specific type of pipes. However, the majority of new pipes may be repaired by this technique.

How long will the process of relining pipes last?

The precise time needed for the process depends on different variables like the location, the environment and type of damage. However, the average Pipe Relining job typically takes around 2 days depending on how many meters need to be lined..

If you want to avoid invasive excavation works and save money in the process of restoring your damaged pipelines’ functionality you should consider using our Local Sydney Blocked Drains ‘s fast and effective pipe relining solutions. Get in touch with us!

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