# Trenchless Sewer Line Repair Options in Denver

Trenchless sewer line repair fixes a failing sewer line from the inside using CIPP lining or pipe bursting, avoiding the full-length trench that traditional excavation requires. Denver Sewer and Water scopes the line first to confirm the pipe's condition supports a trenchless method before recommending one.

- CIPP lining for structurally sound pipe with localized defects.
- Pipe bursting when the line needs a larger diameter or full replacement.
- Camera inspection before any trenchless recommendation.
- Branch and lateral reconnections reinstated after lining.
- Post-cure verification before the job is called complete.

## Which Trenchless Method Fits a Given Sewer Line?

CIPP lining works by pulling a resin-saturated felt tube into the existing pipe and curing it in place, forming a new pipe within the old one. It is a strong option for cracks, root intrusion at joints, and small offsets, but it requires a host pipe that has not collapsed and that still holds enough of a consistent shape for the liner to conform to.

Pipe bursting takes a different approach. A bursting head is pulled through the old pipe, fracturing it outward into the surrounding soil while simultaneously pulling a new pipe in behind it. Because it destroys the old pipe rather than lining inside it, bursting can install a larger diameter line and works on a pipe too damaged for lining, as long as there is room in the soil for the burst and no fragile utilities are too close to the path.

- Whether the existing pipe still holds a continuous shape for lining.
- Whether the project needs a larger diameter, which only bursting provides.
- Number and location of lateral or branch connections along the run.
- Depth and access at both ends of the line.
- Soil conditions and nearby utilities along the burst path.
- Extent and location of the damage found on camera.

## The Pre-Scope Camera Survey

Every trenchless recommendation starts with a full camera run of the line, recording material, diameter, defect locations, and the condition of every branch connection along the way. This is what tells us whether lining will hold, whether bursting is needed, or whether the pipe has failed too badly for either and needs excavation instead.

The survey also identifies debris, scale, and root mass that has to be cleaned out before any liner or bursting head can be introduced, because both methods need a clear bore to work through.

- Pipe material, diameter, and overall condition.
- Location and severity of every defect along the run.
- Condition and count of lateral and branch connections.
- Whether the bore is clear enough to proceed or needs cleaning first.

## How a Trenchless Sewer Repair Runs

1. **Pre-scope the line** A full camera survey confirms condition, defect locations, and whether the pipe supports lining or bursting.
2. **Cleaning and descaling** The line is jetted and cleaned to remove debris, roots, and scale so the liner or bursting head can pass through cleanly.
3. **Select CIPP lining or pipe burst** The method is chosen based on the pipe's condition, whether a diameter increase is needed, and site access.
4. **Install the liner or burst the line** The liner is inverted and cured in place, or the bursting head is pulled through fracturing the old pipe and pulling in the new one.
5. **Reinstate branch connections** Lateral and branch connections cut into the new liner are reopened so every fixture drains into the repaired line.
6. **Post-cure verification** A final camera pass confirms full cure, proper connection reinstatement, and no remaining defects before sign-off.

## What Drives Trenchless Sewer Repair Cost

Length of the run, pipe diameter, number of branch connections that need reinstating, and how much cleaning is required before the liner or burst head can go in all move the cost. Pipe bursting adds the cost of the access pits at each end and any protection needed for nearby utilities along the burst path.

Where a permit or inspection is required by the authority with jurisdiction, those fees are set and collected by that authority, not by us.

Call (720) 935-6221 to get the line scoped and find out which method fits.

## Frequently asked questions

**How do you decide between lining and pipe bursting?**

The camera survey decides it. Lining needs a pipe that still holds its shape. Bursting works on a more deteriorated pipe and can increase diameter, but it needs room in the surrounding soil and clearance from other utilities.

**Does trenchless repair still require any digging?**

Yes, but far less than full excavation. Access pits are needed at the ends of the run and sometimes at branch connections, rather than a continuous trench the full length of the pipe.

**How are the branch lines reconnected after lining?**

A robotic cutter reopens each lateral connection from inside the newly lined pipe after cure, and that reinstatement is confirmed on the post-cure camera pass.

**Can trenchless repair fix a fully collapsed sewer line?**

Not with lining, since the liner needs a shape to conform to. Pipe bursting can sometimes handle a collapsed section if there is enough of a path for the bursting head, but a fully caved-in run often needs excavation instead.

**How long does the liner take to cure?**

Cure time depends on the resin system, pipe diameter, and length, and it is confirmed before the job starts. We do not shortcut cure time, because an under-cured liner fails prematurely.

**Is trenchless sewer repair a city or Denver Water service?**

No. Denver Sewer and Water is a private, family owned and operated company. We are not Denver Water or the City and County of Denver. The utility or municipality with jurisdiction owns the main, sets fees, and inspects the work. We are the licensed contractor who performs the physical tap.

## Related Sewer Repair Services

- [Sewer Line Excavation](https://www.denversewerandwater.com/sewer-lines/sewer-line-excavation/denver-co) Open-trench access for sewer lines that cannot be repaired trenchless.
- [Sewer Line Scope and Video Inspection](https://www.denversewerandwater.com/sewer-lines/sewer-line-scope-video-inspection/denver-co) Camera survey of a sewer line before any tap, repair, or excavation decision.
- [Sewer Line Cleanout](https://www.denversewerandwater.com/sewer-lines/sewer-line-cleanout/denver-co) Cleanout access for clearing and inspecting a sewer line.
- [Sewer Line Replacement and Installation](https://www.denversewerandwater.com/sewer-lines/sewer-line-replacement-installation/denver-co) Full replacement when repair is not the durable answer.
- [Sewer Lines in Denver](https://www.denversewerandwater.com/sewer-lines/denver-co) The full sewer line lane: repair, replacement, trenchless, and inspection.

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Denver Sewer and Water is a privately owned, licensed and insured plumbing contractor. We are not affiliated with, endorsed by, or connected to Denver Water, the municipal water utility, or any government entity. To pay a municipal water bill or reach the public utility, visit denverwater.org.

Source: https://www.denversewerandwater.com/sewer-lines/trenchless-sewer-line-repair/denver-co