Cracked Sewer Line Repair
An independent, licensed plumbing contractor. Not affiliated with Denver Water or the City and County of Denver.
Cracks come in three patterns: longitudinal cracks running along the pipe, circumferential cracks running around it, and fractures where the wall has broken into pieces. Which pattern you have decides whether the line can be repaired in place.
- Three crack patterns, three prognoses.
- Roots and infiltration follow cracks.
- Hairline cracks are often linable.
- Fractures need replacement.
- Camera grading comes first.
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What a Cracked Sewer Line Is
A crack is a break in the pipe wall that has not yet separated into pieces. Longitudinal cracks run the length of the pipe and usually indicate crushing load from above. Circumferential cracks run around the pipe and usually indicate bending from ground movement or a loss of support.
Fractures are the next stage. The wall has broken into distinct pieces that are still roughly in position but can shift out of place at any time.
Cracks matter even when the line still drains. Every crack is an entry point for roots and soil and an exit point for wastewater.
(720) 935-6221How to Identify Cracking
- Camera shows a dark line running along or around the pipe wall.
- Root hairs entering somewhere other than a joint.
- Soil, sand, or gravel accumulating inside the line.
- Groundwater running into the pipe during wet periods.
- Recurring blockages where debris hangs on a broken edge.
- Damp or unusually green ground along the line path.
How We Diagnose It
Why Pipes Crack
Surface load is the classic cause of longitudinal cracking. Vehicles over a shallow line, new hardscape, or heavy equipment transmit force to pipe that was bedded for lighter conditions.
Ground movement causes circumferential cracking. Denver's expansive clay soils lift and drop sections unevenly and rigid pipe bends until it breaks.
Age and material fatigue underlie both. Clay grows brittle, cast iron thins from the inside, and old plastic loses impact resistance.
Repair Options by Crack Severity
- Sectional spot repair for a single crack in an otherwise sound line.
- CIPP lining for multiple cracks along a run where the pipe holds shape.
- Pull-in-place lining for a defined cracked length with one access point.
- Open cut replacement for fractured pipe or cracks combined with grade loss.
- Pipe bursting when cracking is widespread across the whole line.
How Crack Repair Runs
- 1
Clean and Inspect
The line is cleared so cracks are visible instead of hidden under debris, then graded on camera.
- 2
Classify the Cracking
We record pattern, count, and position, because that is what separates a linable line from a replacement.
- 3
Check Shape and Grade
A cracked line that has also deformed or sagged needs replacement rather than lining.
- 4
Repair and Verify
The repair is completed and re-inspected on camera before restoration.
Get a Straight Answer on What Your Line Needs
What Drives Cracked Line Cost
Crack count and spread drive the method. One crack is a spot repair. Cracking through the run is a lining or replacement project.
Depth and surface conditions drive excavation cost whenever digging is required.
Delay raises cost. Cracks widen, admit soil, and turn into fractures and collapses that cost far more to correct.
- Shallow pipe under a working alley cracks from loading rather than from age, which we explain on our Westwood page
- Clean fracture edges near recent building work read differently from slow decay, as covered on our Cory-Merrill page
Frequently Asked Questions
Applicable Methods and Related Diagnosis Pages
Sectional Spot Repair
A short liner or replacement section targeting one isolated defect.
Explore Sectional Spot RepairCIPP Cured-In-Place Lining
A resin liner cured inside the host pipe to form a new jointless pipe wall.
Explore CIPP Cured-In-Place LiningPull-In-Place Lining
A liner pulled into position from one access point for shorter defined runs.
Explore Pull-In-Place LiningOpen Cut Excavation
Traditional trenching when the line has to be exposed and physically replaced.
Explore Open Cut ExcavationCollapsed Sewer Line
What collapse looks like, why it is an emergency, and the only fix.
Explore Collapsed Sewer LineRoot Intrusion Removal
Removing roots and closing the entry point so they do not return.
Explore Root Intrusion RemovalGet the Crack Pattern Graded
The pattern and the count decide whether your line can be repaired in place.