Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Blocked Drains Plumbers on 4 Mar 2026

In the case of fixing damaged pipes solutions are pipe relining and pipe replacement. Both of these methods are designed to restore the function of your pipelines, but they differ in a way that you should be aware of.

Key Takeaways

  • Pipe relining is an economical and quick method of repairing damaged pipelines.
  • The lining CIPP is employed in 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 inside the pipeline.
  • Relining pipes is efficient, cost-effective and lasts for up to 50 years.
  • Traditional pipe replacement involves digging up sections of land where pipes are.
  • A replacement pipe may be needed in the case of pipes that have been severely damaged.
  • A new pipe installed via pipe replacement has a lengthy time span (75 up to 100 years).
  • Pipe replacement is costly and lengthy.
  • The decision between pipe relining or pipe replacement depends on the level of damage that has been caused.

In this post, we’ll look at pipe relining as opposed to. replacing pipes and figure out which one suits your needs better.

What is Pipe Relining?

Pipe relining, also known as Cured-In-Place pipe (CIPP) lining is a cutting-edge repair method that offers a cost-effective and fast solution for repairing damaged pipelines.

Here’s how it works:

  1. Technicians clean the pipeline with high-pressure water jetting or mechanical cleaning.
  2. Then, they apply epoxy resin made of fiberglass or polyester liner to the pipeline.
  3. The liner gets cured, creating a new inner lining inside the pipeline that’s as robust as a new one.

Benefits Pipe Relining

  • Time-efficient – It typically takes only 2 to 3 hours of time to accomplish the entire process compared with excavating for days in traditional pipe replacement techniques.
  • Cost-effective because there is no excavation or removal needed in the pipe relining process, it can save almost half of what you would be paying for conventional repairs.
  • Durability – The lining created through pipe relining can last up to 50 years!

Cons of Pipe Relining

  • Not suitable for very damaged pipes - If you have significant damage such as cracks, collapses or joints that are misaligned 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 areas could contain broken pipes, or very corrosion-prone ones, due to the effects of time or neglect.

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

  1. An excavation crew digs access to the damaged underground pipe.
  2. The old pipeline is detached and dug up, generating a lot of debris that requires disposing of.
  3. Then, they put in the new pipeline on top of the old one.

Benefits of Pipe Replacement

  • Suitable for severely damaged pipes - When you need to replace pipes that are suffering from significant damage or corrosion, pipe replacement is the most effective option.
  • Longer life span – The new pipeline installed through pipe replacement is long-lasting (75 bis 100 years) which makes it a great solution for homeowners who want a permanent solution.

Pros and Cons of Pipe Replacement

  • Costly – Excavation work requred for pipe replacement could be long and costly.
  • Time-consuming – Traditional pipe replacements may take weeks depending on the size of the work and the depth of excavations needed.

Which one should you select?

The decision of relining or replacing your pipes is largely based on the degree of damage caused. If your pipes suffer minor damages like cracks or leaks that are minor, relining would probably be an ideal option as it’s less expensive as well as quicker than conventional replacements.

But if there are severe damage such as breaks or collapses, then you should consider an alternative to replacing your pipe, although it could be more costly 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 which involves the creation of a new pipe within the existing damaged pipe. This is done by inserting a liner that is flexible into the existing pipe, and then the process of curing it. Once cured, the new pipe does not have joints or seams which improves its structural integrity.

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

Traditional replacement of pipes involves physically dismantling old pipes, and then replacing them with brand new ones. Contrary to this, pipe relining does not require excavation. Instead, it’s completed with the help of technology, which allows pipeline repair without digging up large areas of land.

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

Relining pipes typically cost less than the traditional methods of repair to pipelines since there are no costs associated to excavation or other procedures necessary for removing and replacing old pipes.

Can all kinds of pipes be changed?

Not all types of pipes are relined effectively. Your plumber will have to inspect the situation to determine if it is feasible to line the particular kind of pipes. However, the majority of current pipes could be fixed by this technique.

How long will the process of relining pipes last?

The precise time needed for the procedure is contingent upon various elements like the location, the environment and the type of damage. However, the average Pipe Relining task usually takes between 2 and 3 days, depending on the number of metres require lining..

In conclusion, if would like to steer clear of digging works and save money in the process of restoring your damaged pipelines’ full function, consider opting for our Sydney Blocked Drains Plumbers ‘s fast and effective pipeline relining services. Contact us today!

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