Niagara Region Sewer Line Repair


Sewer line issues like backups, leaks, or root intrusion can wreak havoc on your home. Flow‑State Plumbing and Drains delivers skilled, efficient sewer line repair services throughout the Niagara Region—including St. Catharines, Niagara Falls, Welland.

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Exposed clay sewer line in a basement trench during replacement work in St. Catharines.

Why Choose Us for Sewer Line Repair?

✔️ Licensed & Insured Pros
We’re a local, Niagara Region plumbing company based in St. Catharines, trusted for safe and durable sewer line repairs, backed by transparent pricing and no surprise fees

✔️ We Know Niagara Region Drain Systems
From older clay drain systems in the Downtown of St. Catharines, to modern ABS/PVC layouts in the North end of Welland, we’ve worked on every type of sewer line setup.

✔️ Rapid Response, Minimal Disruption
We arrive on schedule, bring protective gear and drop cloths, and respect your property. Our concrete saws, jack hammers, drills, cameras and other tools leave minimal mess behind.

✔️ Traditional Solutions That Work
When spot repairs aren’t enough, we offer complete excavation and sewer line replacement using durable, root‑resistant ABS or PVC drain piping. Whether you need a partial section replaced or a full system overhaul, we’ll walk you through your options.

Plumber in St. Catharines standing beside an open trench in a basement floor showing exposed sewer line during repair.

Our Sewer Line Repair Process

  1. We visit your Niagara Region home, inspect your drain and show you the issue before quoting.
  2. We recommend solutions tailored to the problem, spot repair, or full replacement. No unnecessary up sells!
  3. We execute the repair with precision and re‑camera to confirm it’s sealed, aligned, and leak‑free.
  4. Post‑repair, we restore the area and share maintenance tips relevant to your unique sewer drain situation
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  • Flow State handled a collapsed clay line near an old oak tree, and fixed everything with no fuss. Nice guys who kept the basement pretty clean while working.
    Jenna L.
    Port Dalhousie, St. Catharines
  • Our Merritton home’s sewer kept backing up. Richard’s camera work revealed advanced root damage in 100 year old clay sections. He and his team replaced it all with ABS.
    Michael W.
    Merritton, St. Catharines
  • Richard and his apprentice found a section of rusted out cast iron drains that was causing the clog. They dug up part of our basement, replaced the drain. 10/10!
    Joe C.
    Downtown, Welland

Why DIY Sewer Repair Isn’t Worth the Risk

A Tackling sewer issues yourself might seem cost‑saving until problems like:

  • Hidden clay or cast‑iron pipe damage, root intrusion, or soil collapse clogging your sinks
  • Improperly sealed joints leading to leaks, odour, and ground saturation with sewer water
  • Getting sick working with the sewer waste or hurting your back while digging (it’s hard work!)

We’ve replaced hundreds of clay and cast iron sewer lines all over St. Catharines, Niagara Falls and Welland. We know our stuff!

Our Niagara Region Sewer Line Repair Services

We offer expert solutions tailored to each unique Niagara Region home:

  • Video Camera Inspections – Locate damage or blockage precisely so you know what’s happening in your drains.
  • Pipe Bursting Replacement – Replace fully with durable PVC or ABS with minimal excavation
  • Traditional Excavated Repairs – Full replacement in tight or high-damage areas
  • Root Removal & Prevention – Eliminate intrusion and install root-resistant materials
  • Emergency Sewer Backup Response – 24/7 service when you’re blocked from flushing and drain cleaning is all that’s needed.
Basement floor cut open with gravel and rebar exposed for sewer line repair in St. Catharines.

Serving Homes Across the Niagara Region

St. Catharines – With neighbourhoods ranging from century homes in Glenridge and Merritton to newer builds in Vansickle, St. Catharines features a mix of clay, cast iron, and modern PVC/ABS drain lines. Many older homes still rely on outdated systems that are prone to blockages, corrosion, and tree root intrusion.

Niagara Falls – In areas like Stamford, Lundy’s Lane, and Chippawa, it’s common to find a blend of cast iron and aging clay drains beneath the surface. Shifting soil and tree growth in these neighbourhoods often lead to cracked sewer lines or collapsed sections requiring urgent repair.

Welland – Known for its post-war bungalows and ongoing infill development, Welland homes frequently have cast iron drains that have reached the end of their lifespan. In neighbourhoods like Cooks Mills or the Downtown Core, we often see backups caused by scale buildup, root damage, or pipe sagging.

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Why Professional Sewer Line Repairs Matter

Failing or damaged sewer lines can cause:

  • Basement backups, flooding, and structural damage
  • Sewer gas infiltration or health hazards (it can get messy)
  • Expensive foundation or landscaping repairs
  • Ongoing clogs or backups despite patch fixes

Get it done right. Our experienced team team ensures a clean, reliable, and lasting sewer system that protects your Niagara Region home and your peace of mind. Contact us now to get your free quote.

Flow State Plumbing and Drains plumber standing on a the Burgoyne Bridge in the Niagara Region, wearing work boots and uniform after a day on the job.

Sewer Line Repair FAQs Across The Niagara Region

Below are some of the most common questions we’ve received from customers sewer line repairs.

Many older homes in St Catharine’s Downtown, Port Dalhousie, and Merritton neighbourhoods still have their original clay or cast‑iron pipes that the house was originally built with. As several decades to a century go by, cracks and water leaks develop, roots intrude, creating drain problems that need to be fixed.

If the blockage is on your property (before the property line), you’re responsible. If the issue lies beyond the property line in the city sewer side, the city should handle it.

We offer emergency service for sewer backups, typically, we’re onsite within 2 hours for residents across St. Catharines as we also live in this beautiful city.

It depends on the severity of the problem. Sometimes a sewer line repair job can be completed right away, sometimes it takes several days. We always advise you before beginning work so you’re in the know.

Absolutely. We provide drain line repair services for homes, apartments, retail spaces, restaurants, offices, and other commercial properties across St. Catharines.

Niagara Region Sewer Line Repairs

We’re local, licensed, and know have extensive experience working with century old clay drains to modern ABS sewer lines across all types of homes across the Niagara Region.

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