Commercial Sewer Line Repair & Replacement in St. Louis, MO
When a lateral collapses or an underslab line fails, the building stops. Legacy Plumbing cameras the line, locates the failure, and replaces only what has to come out — across commercial and industrial properties in the St. Louis metro.
Request Sewer Line Service
Tell us scope, schedule, and site address. We reply within one business day.
Sewer Repair Work We Perform
Diagnosis first, then the least-invasive repair that actually solves the problem.
Camera Diagnosis & Locating
HD camera inspection with sonde locating so we mark the exact break instead of guessing at the trench.
Lateral Repair & Replacement
Spot repairs or full lateral replacement from the building to the main, coordinated with MSD and the municipality.
Underslab Repiping
Saw-cut, excavate, replace failed cast iron or clay under the slab, then backfill and patch concrete back to finish.
Root & Offset Failures
Correcting root intrusion, bellied runs, and offset joints that keep causing repeat backups.
Cleanouts & Access
Adding two-way cleanouts and access points so future maintenance never requires another excavation.
Post-Repair Verification
A second camera pass and written report documenting the finished line for ownership and tenants.
How We Handle a Failed Line
Camera & Locate
We inspect the full run, mark the failure, and measure depth before pricing the repair.
Scope Options
Spot repair vs. full replacement laid out with cost and disruption for each so you can decide.
Excavate & Replace
Self-performed excavation with shoring and traffic control as needed, then new PVC or cast iron to grade.
Verify & Restore
Final camera pass, concrete or asphalt restoration, and documentation for your records.
Sewer Line Repair FAQ
Can you find the break without digging up the whole line?
Yes. A camera with a sonde locator pinpoints the failure and depth so we open only the section that needs work.
Do you repair lines under a concrete slab?
Yes. We saw-cut, excavate, replace the failed piping, and patch the slab back — commonly in restaurants, clinics, and older commercial buildings.
Who coordinates with MSD or the city?
We do. Permits, inspections, and any required tie-in coordination with the sewer district are handled as part of the job.
Sewer Line Breaks & Replacement Across the St. Louis Metro
St. Louis has some of the oldest sewer infrastructure in the Midwest. Clay laterals under The Hill and Dogtown, cast iron under mid-century buildings in Overland and Bridgeton, and root-heavy runs in Webster Groves and Kirkwood all fail in predictable ways.
We work with MSD and the municipal sewer districts across St. Louis City, St. Louis County, St. Charles County, and Jefferson County — permits and inspections included.
Don't see your city below? We work the entire metro and a 2-hour radius from O'Fallon, MO. View full service area →
St. Charles County
Warren County
Sewer Line Failing at Your Facility?
We'll camera the line, find the break, and price the repair honestly.