Epoxy pipe lining


What is epoxy pipe lining?

Epoxy pipe lining refers to repairing and restoring old and damaged pipes with a new pipe made from two-part epoxy. It is a no-dig/non-invasive method that essentially creates a new pipe inside the old pipe without any excavation necessary. The result is a tight-fitting, jointless, and corrosion-resistant pipe.

Epoxy pipe lining may also be referred to as CIPP sewer lining, trenchless pipe relining/pipe lining, or trenchless sewer repair, among many others. These are the most common names for installing a new structural pipe material inside an original pipe without having to tear down walls, dig, or excavate around the pipe.

This guide will guide you through the process and teach you everything you need to know about epoxy pipe relining.

Commercial sewer repair | Repiper


How is an epoxy liner for sewer and plumbing systems installed?

The epoxy pipe lining method is performed in four steps:

  • First, the pipes need to be cleaned and descaled to expose damages, but also to expose and open the old pipe to its original inner diameter to make room for the new epoxy lining. If any scale is not removed, important clues crucial to a successful epoxy lining installation may be overlooked. In the end, inconsistent cleaning leads to inconsistent installations.
  • The lining is carefully and fully saturated with two-part epoxy.
  • The epoxy lining is placed in the old pipe using either the pull-in-place method (for sectional or remote installs, tee, wye, and straight liners) or the inversion method (for longer installs). Regardless of the method, the epoxy will always be on the outside of the liner. Air pressure ensures the epoxy lining fills out the original pipe completely.
  • Once the liner is in place, heat is introduced to speed up the curing process of the epoxy using either hot water or steam. During this process, the epoxy resin hardens, leaving a seamless, smooth, and corrosion-resistant new pipe. Curing an epoxy liner inside a sewer or plumbing system may also be cured passively; it takes longer, but yields just as good of a result; this is referred to as “ambient curing”.

When installing the epoxy pipe lining above ground, it is important to install them in the flow of water, overlapping each other. This is to prevent the risk of sewer or drain water leaking behind the new lining material over time. This way, we can optimize the new epoxy lining  system’s lifetime without seal-failure due to poor adherence, which is always a risk when working with old pipes.


The Repiper StepbyStep method

The Repiper StepbyStep method is a superior relining solution for residential, industrial, and commercial small-dimension sewer repair. We offer guidance and all the necessary relining tools and products to carry it out. Using our method, products, and tools, the entire epoxy pipe lining process only takes a few days and is carried out at a fraction of the cost of traditional methods.


Advantages of the Repiper StepbyStep epoxy relining method

The Repiper StepbyStep epoxy pipe lining method provides a host of advantages to the benefit of both the owners of the building and the relining company:

  • Less invasive. Epoxy pipe lining eliminates infiltration and leaks in pipes without having to dig or excavate walls or floors. It ensures the building owners won’t have to evacuate, a critical aspect for businesses to avoid disruption in their daily operations. Due to it being a non-invasive solution, it is frequently used to repair pipe systems in buildings with historical value.
  • Saves time and money. The fact that no excavation or demolition is required makes the epoxy pipe lining method more cost-effective and less time-consuming than traditional repiping.
  • Scalable. The Repiper StepbyStep method is more scalable than traditional pipe restoration methods as it does not require any big and heavy robots, machines, or equipment to repair the pipes.
  • Environmentally friendly. There is little to no waste to dispose of with the epoxy pipe lining. Structurally fine parts of the building remain untouched since the work is done remotely inside the pipe through accesses such as vents or cleanouts.
  • Increased quality. Epoxy lining creates a smoother pipe which increases the flow capacity and ensures that calcification deposits won’t stick. It is also corrosion-resistant, which greatly increases pipe’s longevity.


The Repiper epoxy lining offering

Through innovative epoxy pipe relining solutions, increased knowledge dissemination, and with long experience within the industry as both an installer and supplier, we contribute to the sustainable pipe renovations of the future.


Repiper provides a complete offering of epoxy pipe lining products, including our patented tools and innovative relining products made of premium materials. The offering consists of Swedish-developed relining technologies adopted for the US market – “for installers, by installers”.


Repiper provides detailed on-site training in applying our StepbyStep epoxy relining method and how to use our tools and products, taking your relining operations to the next level.


Receive support from one of our experienced staff members to plan and ensure the success of your relining projects. We guide and instruct you on how to use our products, tools, and StepByStep method.


Epoxy pipe relining can be a cost-effective and less intrusive alternative to traditional pipe replacement. It can extend the life of your pipes, improve water flow, and prevent future leaks and corrosion. The value of pipe relining depends on the specific needs of your plumbing system and the extent of damage to the pipes.

Epoxy is a durable material, but it can crack over time due to environmental factors, mechanical stress, or improper installation. However, with proper preparation and application, epoxy lining can provide a long-lasting solution for pipe repairs. Regular inspection and maintenance can help prevent cracks from developing or worsening.

Epoxy pipe lining is safe for residential purposes when used correctly. It is commonly used to repair and protect plumbing systems in homes. However, it’s essential to hire a professional to handle the installation, as improper application can lead to issues such as poor adhesion or incomplete coverage.

The thickness of epoxy pipe lining can vary depending on the specific application and the product used. On average, epoxy lining for pipes is applied at a thickness of about 1/16 to 1/8 inch. The thickness is determined by factors such as the pipe’s diameter, the severity of the damage, and the intended use of the pipe.

Removing epoxy lining from pipes can be challenging and may require specialized equipment. In some cases, it may be possible to remove the epoxy by sanding or using chemical strippers. However, this can be time-consuming and may not always be effective. In most cases, if the epoxy lining fails or needs to be removed, it is more practical to reline the pipes or replace them entirely.

Advantages of epoxy pipe lining include a less invasive installation process, cost savings compared to pipe replacement, improved water flow, and increased pipe lifespan. Disadvantages may include limited applicability for severely damaged pipes, potential for improper installation, and the need for specialized equipment and trained professionals for the application.

High-quality epoxy resins used for pipe lining are designed to be non-toxic and safe for potable water systems. Once fully cured, the epoxy lining forms a stable, inert barrier that does not leach into the water. It is essential to use epoxy products that meet industry standards and certifications for potable water applications.

Epoxy pipe repairs can last anywhere from 25 to 50 years, depending on factors such as the quality of the epoxy used, the expertise of the installer, the condition of the pipes, and the environment in which the pipes are located. Properly applied epoxy lining can significantly extend the life of your pipes and provide long-lasting protection against leaks and corrosion.