Trenchless sewer repair and replacement
Two primary methods—pipe lining and pipe bursting—address damaged underground sewer lines with limited excavation. The right choice depends on the condition of the existing pipe.
Pipe lining (cured-in-place / CIPP)
Pipe lining creates a new pipe inside the existing one. After the line is cleaned and inspected, a flexible liner coated with resin is inserted, expanded against the host pipe walls, and cured. The result is a continuous, joint-free inner pipe that seals cracks and improves flow.
Lining is typically considered when the host pipe is still aligned and structurally capable of supporting the liner. It usually requires only limited access points and does not remove the old pipe.
- Addresses cracks, leaks, and moderate deterioration
- Preserves the existing alignment and path
- Interior diameter is slightly reduced by the liner thickness
Pipe bursting
Pipe bursting replaces the existing line. A bursting head is pulled through the old pipe, fracturing it outward into the surrounding soil while a new high-density polyethylene (HDPE) pipe is drawn in behind it.
This method is often used when the pipe is collapsed, severely offset, or otherwise unsuitable for lining, or when a full replacement (and potentially a larger diameter) is preferred. Two access pits are typically needed—one at each end of the run.
- Installs a completely new pipe
- Can maintain or increase diameter in suitable conditions
- Requires entry and exit access points
Side-by-side comparison
General characteristics only. Suitability is determined by camera inspection and site conditions.
| Aspect | Pipe lining | Pipe bursting |
|---|---|---|
| Approach | New liner inside existing pipe | Old pipe fractured; new pipe pulled in |
| Best suited when | Host pipe is intact enough to act as a form | Line is collapsed, severely damaged, or full replacement is desired |
| Access | Often one or few access points | Entry and exit pits |
| Diameter | Slight reduction from liner thickness | Full new diameter; upsizing sometimes possible |
| Surface disruption | Minimal | Limited to access locations |
What trenchless methods do not replace
Camera inspection remains the foundation for deciding whether lining, bursting, or traditional excavation is appropriate. Some conditions—large bellies, extreme misalignment, or certain soil and structural issues—may still require open-cut work. The goal of trenchless options is to reduce unnecessary surface damage when the pipe path and condition allow it.
Questions about your line?
Describe the symptoms and location. We can discuss whether a trenchless approach is likely to fit.
Call +1 (878) 242-4445