If your sewer line has failed, the next conversation is about repair method — and the choice between trenchless and traditional open-cut affects your wallet, your yard, your timeline, and the longevity of the fix. Modern trenchless methods (pipe-bursting and cured-in-place lining) have become the default for most Lower Mainland sewer replacements, but they aren't universal. Here's how to think through the choice honestly.
Open-cut sewer replacement — the traditional method
Excavate a trench from the house to the city connection, remove the failed line, lay new pipe (typically ABS or HDPE), backfill, and restore the surface. Has been the standard plumbing repair method for a century. Still the right call in specific situations.
Strengths
- Works for any pipe condition — collapsed, displaced, offset joints, severely corroded, none of it stops an excavator
- Visible repair — homeowner sees what was wrong and what was installed
- Allows correction of grade issues, line routing changes, or upsize
- Standard tooling, every excavation contractor can do it
Weaknesses
- Disrupts everything along the line — lawn, garden, driveway, sidewalk, fence
- Restoration costs add up quickly — concrete saw-cut and patch, sod, landscaping replacement
- Longer timeline — typically 3–5 days on a residential job
- Permit complexity higher (street cuts trigger municipal review)
- Heavy equipment access required (mini-excavator or larger)
Trenchless method 1 — Pipe-bursting
Pipe-bursting uses two small access pits — one at the house end, one at the city connection — and a hydraulic head that's pulled through the existing pipe. The head fractures the old pipe outward into the surrounding soil while pulling new HDPE pipe in behind it. The result: a fully replaced pipe in the original location, without the trench in between.
Strengths
- Minimal yard disruption — two small pits typically 3×3 feet each
- Faster than open-cut — most residential bursts complete in 1–2 days
- New pipe is HDPE (high-density polyethylene) — virtually no joints, 100-year service life expectations
- Often cheaper than open-cut when you factor in restoration costs
- Same-diameter or upsize (going from 4-inch clay to 4-inch HDPE, or upsizing to 6-inch)
Weaknesses
- Requires the existing pipe to have a continuous path — collapsed sections that have completely closed the bore can stop the head
- Doesn't work if the old line has severely offset joints or sharp grade changes
- Can't reroute around obstacles (the new pipe follows the old path)
- Requires soil that the old pipe can be fractured into — extremely rocky soil can cause issues
Trenchless method 2 — CIPP (cured-in-place pipe) lining
CIPP lining doesn't replace the pipe — it puts a new pipe INSIDE the old one. A resin-saturated felt liner is pulled or inverted through the existing pipe, then cured (UV light, hot water, or steam) to harden the resin into a structural new inner pipe. The original pipe acts as a host for the new liner.
Strengths
- Even less disruption than pipe-bursting — often just one access point, sometimes through an existing cleanout
- Works for many partial-collapse and root-intrusion scenarios
- Excellent for navigating bends and existing connections
- 50-year design life
Weaknesses
- Slightly reduces internal diameter (typically by ~3–6 mm) — fine for most residential sewer flow, can matter on smaller commercial lines
- Requires the host pipe to be intact enough to support the liner during cure
- Existing lateral connections need to be reinstated post-cure (robotic cutter from inside the lined pipe) — adds time
- Cured liner is permanent — no going back to the original pipe
How we decide which method for your line
The decision starts with a sewer camera inspection. We map the entire line: depth, diameter, bend points, condition at each section, location of laterals, soil over the line. From that, the method falls out:
- Pipe intact but coated with scale, roots, or grease → hydro-jet first, then decide if any repair is needed at all
- Cracks and minor offset, structural shell intact → CIPP liner
- Multiple cracks, partial collapse in sections, original pipe is mostly there → pipe-bursting
- Total collapse, severe offset, line needs rerouting → open-cut
- Mainline replacement under a finished driveway, mature trees, or expensive landscaping → trenchless almost always wins on total cost when restoration is factored in
Honest cost comparison
We don't post flat-rate book pricing — every job is quoted on site after diagnosis. But the order-of-magnitude framework:
- Open-cut residential sewer replacement: large job; restoration costs are a significant portion of total
- Pipe-bursting: typically lower TOTAL cost than open-cut on residential homes with finished landscaping
- CIPP lining: often the cheapest option when applicable; restricted to specific pipe conditions
We give every customer two written estimates — one for the trenchless option (when viable) and one for open-cut — so the decision is yours. We tell you straight which we recommend and why.
Permits and inspection — all methods
All sewer replacement methods in Surrey, Vancouver, Burnaby, and surrounding Lower Mainland municipalities require a plumbing permit and a municipal inspection. We pull the permit, coordinate the inspection, and provide the final sign-off documentation for your records. Permit fees are bundled into our written estimate — no surprises.
Warranty
Our workmanship warranty applies to every sewer line job we complete. Manufacturer warranties on HDPE pipe and CIPP liner add up to 50–100 years on the materials themselves. We provide all warranty documentation, manufacturer info, and an as-built drawing of the new line on completion.
Frequently asked
Can the city require open-cut?
Not for the private portion of the line (from your house to the property line). Some municipalities have specific requirements for the connection to the city main — we coordinate that with the inspector. Trenchless is almost always allowed for the private portion.
How disruptive is pipe-bursting really?
Two pit locations — one at the house, one near the property line — about 3×3 feet each. Plus the launch and receive equipment needs maybe 8×12 feet of clear space at each end. Everything in between is undisturbed.
Insurance angle?
Insurance coverage of sewer line replacement varies widely by policy. Some BC policies cover sudden collapse but not gradual deterioration. We provide camera video, locator report, and itemized invoice for any claim documentation. We don't promise coverage — that's between you and your insurer — but we make sure you have the paperwork.
Got the problem we just described? We answer 24/7 across Surrey, Langley, Vancouver, Burnaby, Coquitlam, Delta, White Rock, and Richmond. Call Mr. Plunger Plumbing & Drainage at (604) 870-1442 — real plumber on the line, exact ETA before dispatch, up-front quote before any work starts.