When a sewer line is collapsed, crushed, or too far gone to line, pipe bursting replaces it without trenching your whole yard — a new pipe pulled through the old one’s path.
Written bySteven Lockhart·Reviewed byMiguel Lopez, Owner & Licensed Plumber, New Pro Plumbing (CSLB #974600)·Last reviewedAugust 2026 · 6 min readQuick Answer
Pipe bursting is a trenchless method that replaces a collapsed or badly damaged sewer line without a full trench. A bursting head is pulled through the old pipe, fracturing it outward while drawing a new pipe into its place — done through two small access pits, usually in about a day.
Pipe bursting is the heavier-duty of the two trenchless methods. Where lining rebuilds a pipe that still holds its shape, bursting is what we use when there’s no sound host pipe left — a collapsed clay lateral, a crushed section, or a badly offset joint.
Pipe bursting — Pipe bursting is a trenchless replacement method: a cone-shaped bursting head is pulled through the failed pipe, fracturing it outward into the surrounding soil while pulling a new pipe into the void.
It’s the second core method in our trenchless sewer repair service, and on the Westside’s aging clay and cast-iron lines it’s often the right call once roots and age have done real structural damage.
Collapsed, crushed, offset, or undersized lines — the cases where a liner has nothing to bond to.
If the camera shows a pipe that’s cracked but still round, we CIPP line it instead — less disruptive and lower cost.
Every bursting job starts with a camera and ends with one. Here’s the process, start to finish.
We scope the line to confirm it’s a bursting job, not a lining candidate, and locate the access points.
Small pits at each end of the run — one to launch the bursting head, one to receive it.
A bursting head is connected to a new seamless HDPE pipe sized to your line.
A hydraulic rig pulls the head through the old pipe; the old pipe fractures outward as the new one follows.
We tie in the connections and cleanouts so every fixture drains as before.
We backfill the pits, restore the surface, and run the camera again to confirm the new line.
Why the camera first: it’s how we confirm bursting over a CIPP lining job — the same scope we run for a sewer camera inspection.
Line collapsed and every drain backing up? We can help today.
Get a Free QuoteThe right method depends on the shape your pipe is in. Here’s the honest split.
| Method | Best for | Digging | Lifespan |
|---|---|---|---|
| Pipe bursting | Collapsed / offset / undersized pipe | Minimal — two access pits | ~50+ years |
| CIPP lining | Cracked pipe that holds its shape | Minimal — access points | ~50 years |
| Open-trench replace | When trenchless access is impossible | Full trench along the run | ~50+ years |
Not sure which you need? Our trenchless vs traditional guide compares all three, or see the full no-dig sewer repair overview.
Pipe bursting cost depends on the length and depth of the run, the number of connections, and how accessible the two pit locations are. It often runs a bit more than lining because there’s excavation at each end — but far less than an open-trench replacement across the whole yard.
For the numbers behind a full replacement, see our sewer line replacement cost guide. Either way, we scope first and quote one flat price you approve before we dig.
A Mar Vista home's clay main has collapsed at a joint under a mature ficus. Snaking can't get through, and every drain in the house is backing up.
New Pro scopes it, confirms it's beyond lining, and bursts the line — pulling a new HDPE pipe through from two small pits instead of trenching the yard.
A seamless, root-proof main the homeowner can rely on for decades, the ficus and lawn intact, at one flat price agreed before the dig.
The Bottom Line
When a sewer line is truly failed — collapsed, crushed, or offset — bursting replaces it without turning your yard into a trench. If the pipe still holds its shape, we’ll line it instead and save you money. The camera tells us which, and you approve the price first.
Neither is universally better; they solve different problems. Lining rebuilds a pipe that still holds its shape, while bursting replaces one that’s collapsed, crushed, or offset. Bursting can also upsize a line. We scope your pipe on camera and recommend the one it actually needs.
Most residential jobs are completed in a day. Digging the two access pits, pulling the new pipe, reconnecting, and backfilling usually fits into a single visit. You get a timeline with your flat-rate quote.
Far less than a full trench. We dig two small access pits instead of excavating the entire run, so most landscaping, driveway, and hardscape over the line stays intact.
Seamless HDPE, which is jointless and corrosion-resistant. Because it has no joints, tree roots can’t re-enter the way they did with old clay or cast-iron pipe.
Sewer replacement in Los Angeles generally requires a permit, which we pull through LADBS. Permitted, inspected work protects you and your home’s records.
It varies with length, depth, connections, and access, so we scope the line first and quote one flat price you approve before any digging begins.
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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