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What Is Pipe Relining?

April 29, 2024

Table of Contents

The plumbing system of any building is an essential component that ensures the safe and efficient flow of water and waste. However, over time, pipes can deteriorate due to various reasons such as old age, tree root intrusion, or corrosion. When this happens, it can cause major disruptions and inconvenience to the occupants of the building.

In the past, traditional methods of pipe repair involved digging up the damaged section of the pipe and replacing it with a new one, which was not only time-consuming but also expensive. However, in recent years, an innovative solution called pipe relining has emerged as a more reliable and cost-effective alternative.

Understanding Pipe Relining

Pipe relining is a trenchless method of repairing damaged pipes by creating a new lining inside the existing pipe. This technique involves inserting a flexible, resin-coated liner into the damaged pipe and inflating it to create a new, seamless pipe within the old one.

The resin used in pipe relining is made of a mixture of two components – polyester or epoxy – that hardens to form a durable and long-lasting lining. The process is usually carried out through existing access points such as manholes or cleanouts, without the need for any excavation.

How Pipe Relining Works

The first step in pipe relining is a thorough inspection of the damaged pipe using CCTV cameras. This allows plumbers to determine the extent and location of damage before deciding on the best course of action.

Once the damaged section has been identified, it is cleaned using high-pressure water jets to remove any debris or obstructions that may hinder the lining process. Once the pipe is clean and free of blockages, the resin-coated liner is inserted into the pipe using specialized equipment.

The liner is then inflated, allowing it to expand and take on the shape of the existing pipe. This process is carefully monitored to ensure that the lining has adhered properly to the damaged pipe’s walls. Once the lining has hardened, usually within a few hours, the inflation equipment is removed, leaving behind a robust and seamless pipe within the original pipe.

Benefits of Pipe Relining

There are many benefits to using pipe relining as a method of repairing damaged pipes, including:

No Excavation Needed

Pipe relining eradicates the need for disruptive digging. Traditional pipe repair methods often require extensive excavation, leaving you with a wrecked landscape and potential structural damage to your property. Relining, on the other hand, is a trenchless method, preserving your yard and reducing restoration costs.

Less Time-Consuming

Pipe relining is less time-consuming compared to traditional pipe repair methods. The absence of digging reduces the preparation and restoration time. After conducting a CCTV inspection and a high-pressure clean, the plumbers insert and inflate the resin-coated liner inside the damaged pipe. 

The lining adheres to the pipe’s interior, hardens, and forms a durable, new pipe within the original one. This efficient process is typically completed within a day, minimizing the interruption to your home or business.


Pipe relining comes across as a cost-effective solution for pipeline issues. Its trenchless approach eliminates the need for landscape restoration, saving substantial costs. Moreover, the reduced labour and time involved, compared to traditional repair methods, further lowers the expenditure. 

The durability of the relined pipe, which can last for several decades, also ensures value for money, preventing frequent repair expenses. Therefore, while the upfront costs may seem substantial, the long-term financial benefits of pipe relining make it a wise investment for maintaining your plumbing infrastructure.

Environmentally Friendly

Pipe relining is an environmentally friendly option for pipe repair. With traditional digging methods, potential hazards exist, such as accidental hits to gas or water lines, causing environmental damage. The non-invasive nature of pipe relining eliminates these risks, making it a safer choice for the environment.

Increased Flow Capacity

The relining process creates a smoother surface inside the pipe, increasing its capacity to carry water or waste. This leads to an increased flow capacity, improving the overall efficiency of your plumbing system. The enhanced flow can prevent future blockages, saving you from potential plumbing emergencies.


Pipe relining offers the versatility to repair different types of pipes, including sewer, stormwater, and earthenware pipes. It can fix various issues such as tree root intrusions, cracks, and holes. Regardless of the pipe’s material, diameter, or extent of damage, pipe relining can provide an efficient and durable solution, adding to its benefits.

Is Pipe Relining a DIY Task?

Pipe relining is not a DIY task and should only be carried out by trained professionals. The process involves advanced equipment and techniques that require expertise for successful completion. Attempting to reline pipes yourself may lead to further damage or an ineffective repair, resulting in additional expenses. It is best to leave the job to experienced plumbers who have the necessary skills and knowledge to perform the task correctly.

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