Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Sydney Plumber Blocked Drains on 10 Dec 2025

When it comes to fixing damaged pipes, two common methods 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 distinct differences you should be aware of.

Key Takeaways

  • Relining pipelines is a cost-effective and swift process for restoring damaged pipelines.
  • The lining CIPP is employed in the relining of pipes.
  • Epoxy resin is used to line the inside parts of the pipe which sets to create a brand new inner lining inside the pipe.
  • Pipe relining is time-efficient, cost-effective and lasts for up to 50 years.
  • Traditional pipe replacement involves excavation of areas on the property in which pipes are located.
  • A replacement pipe may be needed for pipes that are badly damaged.
  • A new pipeline installed through pipeline replacement has a longer life span (75 -100 years).
  • Pipe replacement is costly and lengthy.
  • The choice between pipe relining versus pipe replacement will depend on the severity of damage that has been caused.

In this article, we’ll discuss pipe relining as opposed to. pipe replacement, and find the one that best suits your requirements more.

Is Pipe Relining a thing?

Relining pipes or Cured-In Place Pipe (CIPP) Lining is a cutting-edge repair method that offers a cost-effective and swift solution for restoring damaged pipelines.

Here’s how it is done:

  1. A technician cleans the pipeline by using high-pressure water jetting or mechanical cleaning.
  2. Then, they put epoxy resin made of fiberglass or polyester inside the pipeline.
  3. The liner cures, creating a new inner liner within the pipeline that’s as robust as a new one.

The advantages of Pipe Relining

  • The process is time-efficient, taking only 2 to three hours for the whole process compared with excavating for several days with traditional methods of replacing pipes.
  • Cost-effective Since there is no excavation or removal necessary for pipe relining this method can save nearly half of the price you’d have to pay for repairs that are traditional.
  • Durability – The new liner made by pipe relining could last for up to 50 years!

The cons of Pipe Relining

  • Not recommended for extremely damaged pipes - If there are serious damages such as cracks, collapses, or joints that are not aligned correctly in your sewer line, then pipe relining could not be possible.

What is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. The sections could include the collapsed pipes as well as extremely corroded ones either from negligence or aging.

The following steps are typical of traditional replacements for pipes:

  1. An excavation team digs access to the damaged underground pipe.
  2. The old pipeline has been removed and dredged out, producing a lot debris which needs to be removed.
  3. Then, they install the new pipeline on top of the previous one.

Benefits of Pipe Replacement

  • It is suitable for pipes with severe damage If you have to replace pipes with severe corrosion or damage, pipe replacement is the ideal solution.
  • Long lifespan – The new pipeline, which is replaced by pipe has a lengthy lifespan (75 to 100 years) which makes it a great alternative for homeowners seeking the best solution for their home.

Pros and Cons of Pipe Replacement

  • Costly – Excavation work requred for the replacement of pipes is time-consuming and expensive.
  • The process is time-consuming. Traditional pipe replacements could take several weeks, based on the nature of the project and the depth of excavations needed.

Which one is best for you?

The decision on whether to go with the option of relining or replacing your pipes mostly depends on the extent of damage caused. If your pipes are suffering from minor damage, such as cracks or leaks of a minor size, relining would probably be the better option since it is less costly and faster than traditional replacements.

However, if you have severe injuries, like breaks or collapses, then you should consider conventional pipe replacement, though it may be more expensive 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

Frequently Asked Questions

What is pipe relining?

Relining pipes is a process which consists of creating a new pipe inside the existing damaged pipe. It is accomplished by inserting a liner that is flexible into the existing pipe, and then the process of curing it. Once it is cured, the new pipe does not have joints or seams that improve its structural strength.

How does the traditional replacement of pipes differ from pipe relining?

Traditional pipe replacement involves digging up and physically removing old pipes and then replacing them with brand new ones. Contrary to this, pipe relining isn’t a requirement for excavation. Instead, it’s completed by using technology that permits pipe repair without digging up vast areas of land.

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

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

Can all types of pipes be lined?

Not all types of pipes can be successfully relined. Your plumber will have to inspect your situation to determine if it is feasible to line your specific kind of pipes. However, most new pipes may be lined with this method.

How long does the process of relining pipes take?

The exact length of time needed for the process depends on different variables like the location, the environment and type of damage; however the typical pipe Relining job usually takes 2-3 days, depending on the number of meters need to be lined..

In the end, if you want to avoid invasive excavation work and save your money as you restore your pipelines’ functionality Consider utilizing our Sydney Plumber Blocked Drains ‘s rapid and effective pipe relining solutions. Contact us today!

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