Understanding the Differences Between Pipe Relining and Pipe Replacement

Posted by Blocked Drains Plumbing Sydney on 31 Dec 2025

In the case of fixing damaged pipes techniques are pipe relining as well as replacement of pipes. Both of these methods are designed to bring back the original function of your pipelines, but they have marked differences that are important to understand.

Key Takeaways

  • Relining pipes is an affordable and fast method for repairing damaged pipelines.
  • The lining of CIPP is utilized in the relining of pipes.
  • Epoxy resin is used to line the inside parts of the pipe. The resin cures to create a new inner lining inside the pipeline.
  • Relining pipe is time-efficient and cost-effective, and will last up to 50 years.
  • The traditional method of replacing pipes is digging up areas of the property where pipes are.
  • A replacement pipe may be needed for pipes that are badly damaged.
  • A brand-new pipeline installed with pipe replacement has a long life span (75 up to 100 years).
  • Replacement of pipes can be costly and lengthy.
  • The decision between pipe relining versus pipe replacement depends on the level of damage that has been caused.

In this article, we’ll discuss pipe relining as opposed to. replacing pipes and figure the one that best suits your needs more.

The term "pipe relining" is used to describe the process of repairing pipes.

Pipe relining, also known as Cured-In-Place pipe (CIPP) lining is a state of the art repair procedure that provides a cost-effective, swift solution for restoring damaged pipelines.

Here’s how it will work:

  1. A technician cleans the pipeline with high-pressure jetting or mechanical cleaning.
  2. Then, they put epoxy resin made of fiberglass or polyester liner in the existing pipeline.
  3. The liner gets dried by forming a new lining in the old pipeline, which is just as long-lasting as the new one.

Benefits Pipe Relining

  • Time-efficient – It typically takes between 2 and 3 hours of time to accomplish the entire procedure compared to excavating many days using traditional pipe replacement techniques.
  • Cost-effective - Because no excavation or removal is necessary in pipe relining work this method can save nearly half of the amount you pay for traditional repairs.
  • Durability – The new liner created through pipe relining can last for up to 50 years!

Pros and Cons of Pipe Relining

  • Not suitable for severely damaged pipes - If you have significant damage such as cracks, collapses or misaligned joints in your sewer line then pipe relining could not be possible.

What exactly is Pipe Replacement?

Pipe replacement involves digging up portions of the yard/sidewalk/driveway where underground pipes are located. The sections could include damaged pipes, or highly corrosion-prone ones, due to age or neglect.

The following steps comprise most traditional replacements for pipes:

  1. An excavation team digs access to the decayed underground pipe.
  2. The pipeline that was previously in use is detachment and dug out, creating a lot of debris that requires disposing of.
  3. Then, they install another pipeline in place of the old one.

Pros of Pipe Replacement

  • Ideal for pipes that have been severely damaged - When you need to replace pipes that are suffering from significant corrosion or damage, pipe replacement is the best option.
  • Long lifespan – The new pipeline that is installed by pipe replacement is long-lasting (75 bis 100 years) which makes it a great choice for homeowners in search of the best solution for their home.

Pros of Pipe Replacement

  • Costly – Excavation work requred to replace pipes can be long and costly.
  • It is time-consuming. Pipe replacements may take weeks depending on the nature of the project and the depth of excavations needed.

Which one is best for you?

The decision of relining or replacing your pipes mostly depends on the extent of damage caused. If your pipes are suffering from minor damages like cracks or leaks that are minor, relining would probably be the best option, as it’s less costly and faster than traditional replacements.

However, if you have severe damage, such as collapses or broken pipes, then you should consider an alternative to replacing your pipe, although it may be more expensive and takes 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

Common Questions and Answers

What is pipe relining?

Relining of pipes is a procedure which involves the creation of a new pipe in the damaged pipe. It is accomplished by inserting a flexible liner inside the existing pipe, and then curing it in place. Once it is cured, the new pipe has no joints or seams, which enhances its structural strength.

How does traditional pipe replacement differ from pipe relining?

Traditional replacement of pipes involves excavating 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 carried out using technology that allows for pipe repair without digging up large areas of land.

Which method is cheaper - pipe relining or traditional pipe replacement?

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

All kinds of pipes can be lined?

Not all types of pipes can be relined successfully. Your plumber must examine your situation to determine if it’s possible to line the particular kind of pipes. However, most modern pipes can be repaired by this technique.

How long does the pipe relining process take?

The exact duration of the process depends on different factors such as the location, the environment, and type of damage; however, the average pipe Relining job typically takes around 2 days based on the amount of metres need to be lined..

In the end, if you wish to avoid digging work and save money as you restore your pipelines’ functionality you should consider using our Blocked Drains Plumbing Sydney ‘s quick and efficient pipe relining services. Contact us today!

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