A cracked sewer pipe rarely stays small. It leaks, draws roots into the gap, and widens over time — but caught early, it’s a trenchless fix, not a dig.
Written bySteven Lockhart·Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)·Last reviewedAugust 2026 · 7 min readQuick Answer
A cracked sewer pipe has a fracture or split that leaks wastewater and lets tree roots in. Left alone it widens toward a collapse. Caught while the pipe still holds its shape, the fix is trenchless CIPP lining — a new pipe cured inside the old one that seals the crack without digging up your yard.
A crack in a sewer pipe is a leak and an open door. Wastewater seeps out, and tree roots sense the moisture and grow straight into the gap, prying it wider. What starts as a hairline fracture becomes a root-clogged, leaking section.
Cracked sewer pipe repair — Cracked sewer pipe repair is the sealing of a fractured but still-intact sewer line — most often by trenchless CIPP lining, which cures a new jointless pipe inside the old one to close the crack without excavation.
The good news is that a cracked-but-intact pipe is the ideal case for trenchless sewer line repair — we can seal it from the inside before it ever needs digging.
CIPP lining cures a new pipe inside the old one, sealing the crack for good.
If the crack has progressed to a collapse, lining won’t hold — it needs replacement.
Confirm it’s a crack, seal it from the inside, verify.
We scope the line to find the crack and confirm the pipe still holds shape.
We hydro jet out roots and debris so the liner bonds cleanly.
We size the liner to the pipe’s length and diameter.
A resin liner is inverted in and cured into a hard, jointless pipe.
We reopen any branch connections internally.
We confirm a smooth, sealed pipe on screen.
Cracked from roots? If roots caused it, sealing the pipe stops them for good — see tree roots in your line, then lining to close the gap.
Leak or crack in the line? Seal it before roots make it worse.
Get a Free QuoteMost cracked laterals under older Westside homes are made of vitrified clay or cast iron, and both were installed generations ago. Clay is brittle and jointed; cast iron corrodes and thins. Decades of ground movement on the region’s expansive soils, the steady pressure of nearby tree roots, and the ordinary settling of the earth around a rigid pipe all conspire to open hairline fractures that widen with every wet-and-dry cycle.
A crack is rarely a standalone problem for long. The moment it starts leaking, it advertises itself to tree roots, which are drawn to the escaping water and grow into the gap, prying it wider and adding a blockage on top of the leak. Left unaddressed, the same crack that could have been lined in an afternoon becomes an offset joint, then a partial collapse, and the trenchless repair that would have cost the least is no longer possible. Catching it while the pipe still holds its round shape is the whole game.
Because the fix depends entirely on the pipe’s condition, we confirm it on camera first and verify our work the same way. Any repair that follows is permitted and inspected where required — you can verify our California contractor’s license (CSLB #974600) before we begin. That transparency matters on buried work you’ll never see: the camera footage, the license, and the flat-rate quote in writing are how you know the crack was actually sealed, not just snaked past.
It depends on whether the pipe still holds its shape. The camera decides.
| Condition | Method | Digging |
|---|---|---|
| Crack, pipe intact | CIPP lining | Access points only |
| Crack + collapse | Pipe bursting | Two access pits |
| Beyond trenchless | Open-trench replace | Full trench |
Not sure how far gone it is? A scope settles it — and most cracks are no-dig sewer solutions. See costs.
Lining a cracked pipe costs less than replacing it, because there’s minimal digging. Price tracks the length and diameter of the run and how accessible it is. A short, accessible crack is at the low end; a long or deep run costs more.
For the full breakdown, see our trenchless sewer repair cost guide.
A Palms homeowner has a slow, smelly drain and a patch of soggy lawn. The camera shows a cracked clay section leaking underground.
New Pro jets the roots out of the crack and lines the pipe — sealing the fracture into a smooth, jointless run.
The leak and smell are gone, the lawn dries out, and the pipe is rated for decades — with no trench across the yard.
The Bottom Line
A cracked pipe is a small problem with a short shelf life — roots and leaks make it worse fast. Caught while the pipe holds its shape, it’s a clean trenchless fix. Wait too long and a crack becomes a collapse, and a lining job becomes a replacement.
In most cases, yes. As long as the pipe still holds its round shape and is continuous, CIPP lining seals the crack from the inside by curing a resin liner into a new, jointless pipe within the old one — no trench across your yard. The exception is a crack that has already progressed to a collapse or a badly offset joint, where there’s no sound host pipe for the liner to bond to; those cases need replacement, usually by trenchless pipe bursting.
Age and material are the biggest factors. Older clay and cast-iron laterals become brittle over decades, and West LA’s expansive soils add constant stress as the ground swells and shrinks with the seasons. Tree-root pressure, ground settling, and heavy loads from driveways or structures above all contribute, and cracks tend to start at the joints where the pipe is weakest. Once a crack forms, escaping water draws roots that pry it wider.
More serious than it first appears, because a crack rarely stays small. It leaks wastewater into the surrounding soil, which can undermine the ground and attract roots that widen the gap. Left unaddressed, a hairline fracture can progress to an offset joint and then a full collapse, at which point a simple lining job becomes a costlier replacement. Sealing a crack early, while the pipe still holds its shape, keeps the repair minimal and trenchless.
Yes, provided the pipe is still round and continuous. The cured liner forms a structural, jointless pipe inside the existing one, spanning and sealing the crack permanently — it’s rated to last around 50 years. Lining is not a patch; it’s effectively a new pipe within the old. The only time it won’t work is when the host pipe has collapsed or lost enough material that there’s nothing solid for the liner to bond against, in which case we replace it.
We run a high-resolution sewer camera down the line, which shows the crack on a monitor and, using a locator in the camera head, marks its exact depth and position from the surface. That same inspection tells us whether the pipe is intact enough to line or has deteriorated to the point of needing replacement. Scoping first is what lets us give you an accurate, flat-rate quote instead of a guess, and you see the problem yourself.
Written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Guidance follows U.S. EPA, CSLB, and LADBS sources where cited. Any figures reflect New Pro Plumbing's flat-rate practice and West LA conditions, not a quote — we confirm pricing in writing before any work begins.
Last reviewed: August 2026.
Honest diagnosis, flat-rate price agreed first, and a clean, code-compliant fix from a family-owned Westside plumber.
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