4 trenchless sewer pipe lining methods – pros cons

Trenchless sewer pipe lining methods are becoming increasingly popular due to their ease and speed. However, they also come with some risks and costs. Which method should you choose?

Sewer pipes are underground pipelines that transport sewage from homes and businesses to public treatment facilities. They can last decades or even centuries before breaking down. When this happens, they often cause flooding, odor, and other problems.

“Trenchless sewer pipe repair” involves using a special tool to break up old pipes and then injecting new plastic into them. This is usually cheaper than digging up the street or repairing the pipe manually.

However, it does require specialized equipment and training. And sometimes, trenchless repairs don’t work. That’s why it’s important to consider the pros and cons of each type of repair before choosing the best solution for your home or business.

What is sewer pipe lining?

Sewer pipe lining is a process performed by a highly skilled professional who uses special tools and equipment to remove old pipes from your property. This involves making sure the area around the sewer line is free of obstructions and debris prior to starting the project. The sewer pipe lining technician will dig into the ground where the old pipe is located. He will then cut open the ground and remove the old sewer pipe. After removing the old pipe he will fill in the hole that was created by digging out the old pipe and finally replacing it back into place. Once the job is complete you will no longer have any problems related to sewage overflow and flooding in your house. It is important to note that the sewer pipe lining procedure needs to be done correctly otherwise you could face serious health issues. For instance if the soil under the sewers is soft the pipe lining crew may not be able to properly excavate the area and thus the job won’t be successful. Also if the ground beneath the old sewer pipe is too hard the workers cannot properly cut open the ground and therefore the job will fail to succeed.

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Trenchless sewer repair is an alternative way to fix broken sewers. It uses a special tool called a liner gun to inject a thin layer of resin-like material into the existing pipe. The resin hardens over time and creates a protective seal around the pipe. The process is relatively quick and easy. It doesn’t involve digging up the ground like traditional trenching. But there are several different types of trenchless sewer repair available. Some are better suited to certain situations than others.

The most common form of trenchless sewer repair is known as “pipe bursting.” It involves cutting out the damaged section of pipe and inserting a flexible liner. Then, the cut ends are sealed together. Pipe bursting works well when the pipe has been in place long enough to develop cracks and leaks. It may not be suitable if the pipe was installed recently. Pipe bursting is also effective at fixing small diameter pipes (1 inch or less). But larger pipes need something else.

If you have a large diameter pipe that needs repair, you might want to try a more permanent option. One such option is called “pigging.” In pigging, a machine digs a trench along the length of the pipe. Then, workers use a vacuum truck to suck out all the soil and debris. Finally, they backfill the trench with concrete. This is a good choice if the pipe is located near a road or sidewalk. It can be expensive though.

Another option is to dig up the entire area where the pipe is located. This requires removing any sidewalks, curbs, or driveways. It also means tearing up grass and landscaping. This is typically done only after the pipe bursts or fails completely. It’s the least desirable option because it’s very disruptive.

But trenchless sewer repair isn’t just about replacing pipes. Sometimes, it’s necessary to install new manholes or catch basins. These are structures that collect rainwater runoff and direct it away from streets and buildings. They’re also used to monitor water quality. If you see puddles on the ground, check the manhole cover first. It could indicate a problem with the drainage system. You should also make sure that the manhole covers are properly secured. Otherwise, they could fall off during heavy rains.

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4 Methods of trenchless sewer pipe lining

Most homeowners who hear about trenchless sewer pipe replacement tend to think that it’s just one method. That is actually incorrect.

There are four methods of trenchless sewer pipe replacement, each with their own advantages and disadvantages. Cured-in-place pipe (CIPP) is the most common method for installing a new sewer line.

1. Cured-In-Place Pipe Lining: What Is It?

Cured-in-place piping is a type of trenchless sewer pipe repair. It’s a technique that uses a specialized tool to inject a resin-like substance into the old pipe. Once cured, the resin forms a protective shell around the pipe.

Step 1: Sewer Line Inspection: Before beginning work, your contractor will perform a thorough inspection of the sewer line. He’ll look for signs of damage, leaks, and other problems.

Step 2: Cleaning the Old Pipe: After inspecting the existing pipe, your contractor will remove any obstructions like tree roots or branches. Then, he’ll clean the inside of the pipe using chemicals and brushes.

Step 3: Measuring the Size of Existing Pipe: Next, your contractor will measure the size of the existing pipe. He’ll do this by placing a string around the outside of the pipe.

Step 4: Preparation of the Replacement Liner: Now, he’ll prepare the new liner. First, he’ll mix two parts epoxy resin and one part hardener. Then, he’ll add sand to create a slurry.

Step 5: Epoxy Preparation and Impregnation: Your contractor will then pour the prepared epoxy mixture into the pipe. He’ll continue pouring until the entire pipe has been filled.

Step 6: Inserting the Tube in the Old Pipe: The next step is inserting the tube into the old pipe. To do so, he’ll place a collar over the end of the tube. Using a special tool, he’ll push the tube into the old pipeline.

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Step 7: Curing of the Liner: Once the tube is fully inserted, your contractor will wait several hours before starting the curing process. During this time, the resin will begin to set. Once the resin cures, it creates an impermeable layer.

Step 8: Inspecting the New Pipe: Finally, your contractor will inspect the new pipe. He’ll use a hydrostatic test to ensure that there are no leaks. This involves pumping air into the pipe while monitoring the level of pressure. If the pressure increases, there may be a leak.

Pros and Cons of Trenchless Sewer Pipe Replacement:


• No digging required

• Can be done quickly


• May require multiple trips if repairs aren’t complete

• Cannot always prevent clogs

• Does not always last as long as traditional pipe replacements

2. Sausage Method: What Is It? The sausage method is similar to the cured-in-place method. However, instead of injecting a resin-like material into the pipe, your contractor will wrap a flexible plastic sleeve around the pipe.

3. Backhoe Method: What Is It?: The backhoe method is also known as the “push through” method. In this case, the pipe is pushed through the ground rather than being pulled through.


Trenchless methods can save you money and time when compared with traditional methods. However, they cannot always fix all types of problems. For example, they cannot always handle broken pipes. They also cannot prevent future issues. So, it’s important to choose the right trenchless method based on your needs.

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