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What is UV Pipe Relining?
If you’ve got a cracked, leaking or damaged pipe, the first thought might be excavation: digging up the ground, removing the broken section and replacing it with new pipework. But in a lot of cases, there’s a faster, cleaner and far less disruptive option.
UV pipe relining is a trenchless pipe repair method that creates a new structural liner inside the existing pipe. Instead of digging the damaged pipe out, a resin-impregnated liner is installed inside the pipe and cured using ultraviolet light. Once cured, the liner hardens to form a strong new pipe within the old one. This can help seal cracks, gaps, leaking joints and root entry points without tearing up driveways, landscaping, concrete, gardens or internal areas.
UV pipe relining can be used for a range of sewer and stormwater pipe issues, including cracks, root intrusion, deterioration, leaks and certain types of structural damage. It’s a modern solution designed to restore pipe performance while keeping disruption to a minimum.
How Does UV Light Cure the Liner?
The key difference with UV pipe relining is the curing process. The liner is prepared with a UV-reactive resin, then positioned inside the damaged section of pipe. Once the liner is in place, UV light is passed through the pipe (this activates the resin and causes it to harden). As it cures, the liner forms a durable internal layer that bonds to the shape of the existing pipe. The result is a smooth, strong liner that supports the damaged pipe from the inside. It’s designed to improve flow, seal defects and reduce the chance of future root entry through the repaired section.
How Does the UV Pipe Relining Process Work?
Every pipe relining job is different, but the UV relining process generally follows a clear sequence. The pipe needs to be inspected, cleaned, prepared, lined and checked before the job’s complete.
Step 1 – CCTV Drain Inspection
The first step is a CCTV drain inspection. A specialised drain camera is sent through the pipe to assess the condition of the system from the inside. This inspection helps identify cracks, breaks, root intrusion, misaligned joints, corrosion, blockages, collapsed sections and other defects. It also helps determine the location and length of the damaged section.
Just as importantly, a CCTV inspection confirms whether UV pipe relining is suitable. Some pipes may need cleaning, descaling or obstruction removal before relining can take place. In more severe cases, a collapsed or badly deformed pipe may need another repair approach first.
Step 2 – Pipe Cleaning & Preparation
Once the issue’s been identified, the pipe needs to be properly cleaned and prepared (this is a crucial part of the process, because the liner needs a clear and stable surface to sit against). High-pressure water jetting may be used to remove debris, silt, grease, roots and loose material from inside the pipe. If there’s heavy scale, concrete, protrusions or other obstructions, additional preparation may be required.
Good preparation helps ensure the liner can be installed correctly and cure properly (it also gives the team a clearer view of the pipe’s final condition before the liner goes in).
Step 3 – Liner Installation
After the pipe has been inspected and cleaned, the liner is prepared to suit the damaged section. The liner is measured, cut and impregnated with resin before being inserted into the pipe. Once inside, it’s carefully positioned against the area that needs repair. The liner is then inflated or held in place so it sits tightly against the internal wall of the existing pipe.
Accuracy matters at this stage. The liner needs to cover the damaged section properly, including cracks, gaps, failed joints or root entry points.
Step 4 – UV Curing & Final Inspection
Once the liner is in position, UV light is passed through the pipe to cure the resin. The light activates the liner, causing it to harden into a durable internal pipe layer. One of the major advantages of UV pipe relining is that the curing process is controlled and efficient; once curing is complete, the liner becomes a solid, structural repair inside the existing pipe. A final CCTV inspection is then carried out to check the finished result. This confirms that the liner has cured correctly, the repair is in place and the pipe is ready to return to service.
The Benefits of UV Pipe Relining
No Digging or Excavation
Traditional pipe replacement often means digging up the damaged pipe, and that can involve cutting through concrete, removing paving, disturbing landscaping or excavating around buildings and services. UV pipe relining avoids much of that disruption. Because the repair is completed from inside the pipe, there’s often no need to dig up the surrounding area. This makes it especially useful for pipes under driveways, gardens, slabs, paths, buildings or hard-to-access spaces.
Fast Cure Times
UV curing is generally quicker than some other liner curing methods. Once the liner is installed and the UV equipment is in place, the resin can be cured efficiently and consistently. This can help reduce downtime, which is especially important for commercial, industrial and high-use properties. The faster the repair can be completed, the sooner the drainage system can get back to normal.
Long-Lasting Results
A properly installed UV liner creates a strong internal repair that can extend the service life of the existing pipe. It helps seal cracks, gaps and joints, while also improving the internal surface of the pipe. By closing off root entry points and reinforcing damaged sections, UV pipe relining can help prevent recurring blockages and ongoing leaks. For many properties, it’s a practical long-term alternative to digging up and replacing pipework.
Is UV Pipe Relining Right for Your Property?
UV pipe relining can be a great option for many damaged sewer and stormwater pipes, but it’s not suitable for every situation. The right solution depends on the condition of the pipe, the type of damage, the pipe diameter, access points and whether the pipe can be properly cleaned and prepared. It may be suitable if your pipe has cracks, leaking joints, root intrusion, minor misalignment, corrosion or general deterioration. It can also be useful where the damaged pipe runs beneath concrete, landscaping, paving, driveways or buildings. However, if a pipe has fully collapsed or is severely deformed, it may need other work before relining can be considered… that’s why a CCTV inspection is always the best starting point.
Get a Professional Pipe Inspection Today
If you’re interested in UV pipe relining, the first step is finding out whether your existing pipe is suitable for the process. A CCTV drain inspection can show the pipe’s condition, the type of damage, the length of the affected section and whether the line can be properly cleaned and prepared for UV curing.
This is especially important if you’ve had repeat blockages, root intrusion, cracked pipework or drainage issues in hard-to-access areas. Once the pipe has been inspected, Sewer Stormwater Pipe Relining can advise whether UV pipe relining is the right option or whether another repair method would be more suitable.
Get in touch
Thinking about UV pipe relining for your sewer or stormwater pipes? Get in touch with Sewer Stormwater Pipe Relining to arrange a CCTV inspection and find out whether a fast, no-dig UV liner repair is right for your property.