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Sewer Pipe Lining

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Sewer Pipe Lining

Trenchless Sewer Rehabilitation

Sewer pipe lining provides a way to rehabilitate damaged or aging sewer lines without fully excavating the existing pipe. Instead of digging up the entire line, contractors can install a new liner inside the existing sewer.

This approach can reduce excavation, surface disruption, and restoration work. As a result, trenchless rehabilitation can be useful for sewer lines beneath roads, sidewalks, parking areas, buildings, and other developed locations.

DL VEWS works with engineers, contractors, municipalities, and infrastructure owners to identify sewer rehabilitation options that fit the project.

How Sewer Pipe Lining Works

The lining process starts with an inspection of the existing sewer. First, crews clean the pipe and remove debris or other materials that could interfere with installation. A camera inspection can then help identify cracks, damaged joints, roots, and other problems.

Next, the contractor selects a lining system based on the condition and size of the existing pipe. The liner is then installed through an existing access point, such as a manhole, when the project allows.

After installation, the liner forms a new interior surface inside the existing pipe. The exact installation process depends on the lining system and project requirements.

The U.S. Environmental Protection Agency identifies cured-in-place pipe (CIPP), sliplining, spiral-wound lining, and other methods as trenchless approaches for sewer rehabilitation.

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Benefits of Trenchless Sewer Lining

Trenchless rehabilitation can provide several benefits compared with traditional excavation.

  • Less surface excavation
  • Reduced disruption to roads and traffic
  • Less impact on landscaping and paved areas
  • Reduced restoration work
  • Access through existing manholes in suitable applications
  • A smooth new interior surface
  • Options for different pipe sizes and conditions

For example, the Federal Highway Administration has documented trenchless rehabilitation projects where CIPP and sliplining restored deteriorated pipes while reducing the need for roadway excavation and lane closures.

Sewer Pipe Lining Applications

Sewer lining can apply to many municipal and commercial sewer systems. Depending on the project, rehabilitation may address damaged sewer mains, leaking joints, cracks, infiltration, and other defects.

Common applications include:

  • Municipal sewer systems
  • Gravity sewer lines
  • Commercial properties
  • Industrial facilities
  • Wastewater infrastructure
  • Sewer mains beneath roads
  • Sewer lines beneath developed areas

Before choosing a lining method, the existing pipe should be inspected and evaluated. Pipe diameter, length, condition, access, flow, and service connections can all affect the installation process.

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Sewer Lining vs. Traditional Replacement

Traditional sewer replacement usually requires excavation to access and remove the existing pipe. In contrast, trenchless lining works within the existing sewer when site conditions allow.

This difference can be important when a sewer runs beneath a busy roadway, building, sidewalk, or other developed area. By reducing the amount of excavation, trenchless rehabilitation can also reduce the surface restoration required after construction.

Not every sewer is a candidate for lining. For this reason, an inspection should take place before the project begins. Severe collapse, major deformation, access limitations, or other conditions may require a different rehabilitation or replacement method.

Choosing a Sewer Lining System

Every sewer rehabilitation project has different requirements. For that reason, the lining system should match the condition of the existing pipe and the needs of the project.

Important factors include:

  • Pipe diameter
  • Pipe length
  • Existing pipe material
  • Structural condition
  • Groundwater conditions
  • Sewer flow
  • Service connections
  • Access points
  • Required flow capacity
  • Installation conditions

Once these factors are understood, engineers and contractors can compare the available rehabilitation methods and select an appropriate solution.

Which products does DLVEWS use for sewer pipe lining?

In order to best serve our clients, DLVEWS represents the following products: 

Additional options are also offered as needed based on project scope.

 

Interested in sewer pipe lining? Get in touch today!