man checking through the pipe line

How Does Pipe Relining Work?

Pipe relining, a revolutionary approach in modern plumbing, offers a less invasive alternative to traditional pipe repair methods. This technique, known for its efficiency and minimal disruption, has become increasingly popular for repairing damaged pipes or deteriorated pipes. In this first part, we delve into the basics of how pipe relining works, exploring its key components and initial stages.

Understanding the Concept

At its core, pipe relining involves creating a new pipe within an existing one. This is achieved by inserting a liner coated with a special resin into the damaged pipe. Once in place, this liner is expanded to adhere to the interior walls of the existing pipe, and the resin is then cured to form a robust, seamless new, sewer pipe relining.

The Initial Assessment

Pipe going through the sewer

1.      Inspection: The first step in the pipe relining process is a thorough inspection of the existing pipe. This final inspection is typically done using closed-circuit television (CCTV) cameras, which provide a clear view of the pipe’s interior. This inspection helps identify the extent and nature of the damage to sewer pipes, such as cracks, breaks, or blockages.

2.      Evaluation: Based on the inspection, experts evaluate the feasibility of relining pipes. They consider factors like the pipe’s size, material, and the severity of the damage. This evaluation is crucial in determining the appropriate relining approach and pipe materials.

Preparing for the Relining Process

Tools that use for Pipe Repairing

1.      Cleaning the Pipes: Before the pipe relining services can commence, the existing pipe must be thoroughly cleaned. This is usually done using high-pressure water jetting or mechanical cutting tools. The objective is to remove any debris, or tree roots or, or buildups that could interfere with the relining process.

2.      Choosing the Right Materials: The selection of materials for the liner and resin is a critical step. The liner is usually made from a flexible felt-like material, while the resin could be an epoxy resin, polyester, or vinyl ester, depending on the specific requirements of the job.

The Relining Procedure

Pipe on the ground

1.      Liner Impregnation: The chosen liner is impregnated with the resin, ensuring it is evenly coated. This step is often done on-site to maintain the resin’s efficacy.

2.      Insertion of the Liner: The impregnated liner is then carefully inserted into the damaged pipe. This can be done using various methods, such piping systems such as inversion (using air or water pressure) or a pull-in-place system.

3.      Inflation and Adhesion: Once the liner is in place, it is inflated to make it adhere to the pipe inversion tank’s interior walls. This step is crucial as it ensures the liner forms the shape of the existing pipe, covering any damages or irregularities when repairing pipes.

The Curing Process

Comparison of 2 pipe

1.      Curing the Resin: After the liner is correctly positioned and inflated, the resin needs to cure. This can be done ambiently or accelerated with heat or UV light. The curing process is what transforms the resin-impregnated liner into a solid, sturdy pipe within the old pipe.

2.      Time and Monitoring: The curing time varies based on the resin type and the curing method used. Throughout this process, the progress is often monitored to ensure proper curing and adhesion.

Completing the Pipe Relining Process

women and man happy with work

Final Stages of Pipe Relining

After the resin in the liner of old pipes has cured, transforming into a robust new pipe within the old one, the whole pipe lining and relining process enters its final stages. These steps are crucial to ensure the integrity and functionality of the relined pipe.

1.      Quality Assurance and Inspection:

  1. Post-Curing Inspection: Once the resin has fully cured, another inspection is typically conducted. This is often done using CCTV cameras, similar to the initial inspection. The purpose is to ensure that the liner has adhered correctly to the pipe walls and that there are no defects in the new pipe.
  2. Integrity Checks: These inspections check for any gaps, misalignments, or imperfections in the relined pipe. Ensuring the integrity of the relined section is crucial for the long-term performance of the pipe.

2.      Reinstating Connections:

  1. Reopening Lateral Connections: In many cases, especially in sewer lines, lateral connections to the mainline need to be reinstated. This is done using robotic cutters that precisely cut out openings in the liner to align with the connecting pipes.
  2. Ensuring Flow: The proper reinstatement of these connections is essential to maintain the overall functionality of the plumbing system.

3.      Final Cleanup and Restoration:

  1. Site Cleanup: After the relining and inspection are complete, any equipment used is removed, and the site is cleaned up. This step is relatively minimal compared to traditional pipe replacement due to the non-invasive nature of pipe relining.
  2. Surface Restoration: If any minor excavations or surface disruptions were made to access the pipe, these areas are restored. However, the extent of restoration work is significantly less than that required after traditional pipe replacement.

Advantages of Pipe Relining

leaking from the pipe

Durability and Longevity:

  1. The new pipe formed by the relining process is often stronger and more durable than the original piping material. It is resistant to common issues like corrosion, tree root intrusion, and calcification.
  2. The lifespan of a relined pipe can extend to several decades, reducing the need for frequent repairs.


  1. While the initial cost of pipe relining can be significant, it is often more economical in the long run. The reduced need for excavation, lower labor costs, and minimal landscape restoration contribute to its cost-effectiveness.
  2. The longevity of relined pipes also means fewer expenses in future repairs and maintenance.

Environmental Impact

Green Foot print on earth

Pipe relining is a more environmentally friendly option compared to traditional methods. It minimizes soil disturbance, reduces the carbon footprint associated with heavy machinery, and decreases the risk of environmental contamination from damaged pipes.

  Time Efficiency

The process is generally quicker than traditional pipe replacement. Most relining jobs can be completed in a matter of hours or a few days, depending on the project’s scale, significantly reducing the disruption to daily activities.


Pipe relining can be applied to a wide range of pipe sizes and types, including water, sewer, and gas pipes. It is also effective in various settings, from residential to commercial and industrial.

Conclusion: Embracing the Efficiency and Innovation of Pipe Relining

In summary, pipe- relining solution emerges as a highly efficient and innovative solution in the field of plumbing repairs. This method, which involves creating a new, durable pipe within an existing damaged one, stands out for its minimal invasiveness, cost-effectiveness, and environmental friendliness. The process, from the initial inspection and cleaning of repair pipes to the final quality checks, is streamlined and precise, ensuring the integrity and longevity of the relined pipes.

Q&A Section: Key Insights into Pipe Relining

Q1: about pipe relining specialists What is pipe relining and how long does it take? A1: Pipe relining is a method to repair damaged pipes by inserting a resin-coated liner inside the existing pipe, creating a new inner pipe. Most jobs are completed within a day, depending on pipe condition and size.

Q2: Is pipe relining durable and cost-effective? A2: Yes, the pipe relining technology is highly durable, extending the original pipe part’s life by decades and resistant to common issues. It’s cost-effective due to lower labor, reduced excavation, and minimal restoration costs.

Q3: Can all types of pipes be relined, and can relining fix all types of damage or broken pipes? A3: Relining works for partial repairs of most pipe types but isn’t suitable for completely collapsed or severely misshapen pipes. It effectively repairs damages like cracks and leaks, but not severe structural damage.

Q4: What are the environmental benefits of pipe relining, and how are lateral connections handled? A4: Pipe relining is less invasive, reducing soil disturbance and carbon footprint. Lateral connections broken kitchen pipes are reinstated using robotic cutters during the drain relining process.

Q5: How does the pipe relining service, compare to traditional pipe replacement? A5: Pipe relining is quicker, less disruptive, and often more cost-effective than traditional replacement, making it a preferred choice for many plumbing repair needs.

Q6: How is the quality of the lining materials a relined pipe assured? A6: Quality of pipe relining specialist is assured through post-relining CCTV inspections, ensuring the liner adheres correctly and the pipe is free from defects.

Recent Posts