What Is Trenchless Pipe Repair? | Advantage Reline

Trenchless Pipe Repair

It’s an unfortunate but unavoidable fact that pipes don’t last forever. Regardless of the durability of the material, the diameter of the pipe, or the care with which they are maintained, pipes are still subject to factors like the passage of time, degradation from regular use, and natural disasters. 

That means that eventually, pipes break down, and it’s a problem that can ruin nearly anyone’s day, from homeowners to civil engineers. But resolving the issue doesn’t need to be complicated or costly. There are techniques and technologies that avoid the open trenches of traditional solutions. That’s why these methods are called “trenchless” pipe repair.


The Problem

For the longest time, if you needed to rehabilitate a pipeline, be it water, sewer, gas, or oil, you had to “dig and replace.” Those who work in public works, or as plant supervisors are likely familiar with this method, and the downsides that come with it. 

There’s the cost of digging the trench, and replacing the pipe wholesale. There’s the downtime, the disruption to other activities, and the damage to the environment and landscaping. For homeowners, it’s a colossal money pit and a terrible eyesore. For those dealing with pipes professionally, it’s a logistical nightmare. 


The Solution—Trenchless Pipe Repair

The good news is, unlike military strategy in WWI era Europe, trenches aren’t your only option. Pipes can actually be rehabilitated via trenchless methods, and these methods fall into two categories: pipe bursting and Cure in Place Pipe (CIPP). 


Pipe Bursting

Pipe bursting involves destroying the old pipe to make room for new pipe. Using hydraulics, a device called a bursting head is pulled through the old pipe, breaking it open and moving it out of the way, with the replacement pipe pulled behind it at the same time. 

It’s trenchless, because only two access holes need to be dug—one for inserting the bursting head and new line, and one at the other end to pull it through. Because pipe bursting destroys the old pipe to make room for the new line, it’s a system that actually allows for increasing the diameter of the pipeline. 



Cure in Place Pipe takes a different approach. Rather than destroying the old line in order to replace it, the old pipe is lined with the replacement. This comes in two forms, resin lines and high-density polyethylene (HDPE).


Resin Lines

With this method, a felt liner is inserted into the host pipe, and then exposed to a curing agent. The agent causes the resin in the liner to adhere to the host pipe, effectively coating and sealing it. This system is seamless and jointless, and has minimal impact on the cross-section of the pipe.



Lastly, we have HDPE. This system is essentially a pipe within a pipe. The liner is inserted, and then the sections of the liner are bonded together via processes such as butt welding or electrofusion welding. This creates a seamless inner pipe that functions as well (or sometimes better) as the host pipe, and often lasts much longer.


Want to know more about the specifics of trenchless pipe repair? Contact the specialists at Advantage Reline.



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