Same-Day Service
Most service calls handled same-day across Spokane and Coeur d'Alene.
Sewer Services
Sewer line problems, solved by techs who actually do this every week.
The sewer line is the part of your plumbing nobody thinks about — until it backs up, smells, or sinks the lawn above it. When that happens, you need a real diagnosis, not a guess. Our team starts every sewer job with an HD camera in the line so you can see exactly what’s wrong before any work is quoted.
From a small spot repair to a full trenchless sewer-line replacement, we handle the entire scope: sewer camera inspections, main line repairs, sewer line replacement, trenchless sewer lining, and plumbing excavation. One licensed crew, one flat-rate quote, one written warranty.
- Camera-verified work We don't guess — we look. Every sewer job starts with a camera in the line.
- Stocked trucks Cables, jetters, locators, and CIPP tools on board for one-trip repairs.
- Flat-rate quotes Approved before any work — never charged by the hour.
- Warrantied work 1-year labor warranty plus full manufacturer parts coverage.
When to Call
Signs your sewer line needs service
Sewer problems rarely fix themselves. Most get worse fast — a small root intrusion this year is a collapsed line next year. If you see any of these, schedule an inspection.
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Multiple fixtures backing up
When more than one drain backs up at the same time, the problem is in the main line.
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Wet patches in the lawn
Lush green patches or soggy ground over the sewer line is a classic sign of a leaking or broken main.
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Recurring main-line clogs
If a drain cleaning won't hold for more than a few months, you have a structural problem in the line.
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Gurgling toilets
Air being pulled past a partial blockage in the main line — early warning of a full backup.
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Sewage smell outdoors
A cracked sewer line under the lawn or driveway leaking gas to the surface.
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Foundation or yard sinking
A sinkhole or settling foundation can mean the sewer line has collapsed and the soil is washing away.
What We Do
Full sewer service from camera to replacement
Five core services — every sewer issue, handled by one licensed crew. We start with the camera, then fix only what actually needs fixing.
- Sewer Camera Inspections HD video down the line shows exactly where the problem is — and where it isn't. Includes locator + footage.
- Main Line Repairs Spot repairs for cracked, offset, or root-damaged sections — keep the rest of the line intact.
- Sewer Line Replacement Full main-line replacement for collapsed, bellied, or end-of-life clay or Orangeburg pipe.
- Trenchless Sewer Lines CIPP cure-in-place liner — replace the inside of the pipe without digging up the yard, driveway, or landscaping.
- Plumbing Excavation When a dig is unavoidable: licensed excavation, careful utility locating, and clean restoration of lawn and hardscape.
- Hydrojet Cleaning High-pressure jetting clears roots, grease, and scale before any liner or repair work.
- Pipe Locating Electronic locating to mark the exact path and depth of the line before any digging starts.
- Warrantied Restoration Backfill, compaction, and surface restoration — done right, warrantied in writing.
How It Works
Our 4-step sewer service process
Camera first, fix second. We never quote a sewer repair without showing you the video.
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Call & schedule
Speak to a real dispatcher 24/7. Most sewer inspections scheduled within 24–48 hours.
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Camera & locate
HD camera down the line. We show you the video and mark the exact failure point.
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Quote the options
Repair, trenchless lining, or replacement — flat-rate quotes for each, no pressure.
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Fix & restore
One licensed crew handles the work, the cleanup, and the restoration — warranty in writing.
Why Choose Mainstream
Upfront Pricing
Flat-rate pricing approved before work begins — no surprises on the invoice.
Licensed & Insured
Fully licensed in Washington and Idaho, bonded, and insured for your protection.
Satisfaction Guaranteed
If it isn't right, we make it right. Period.
Sewer line problem? Camera inspection first.
Same-day service across Spokane & Coeur d'Alene — flat-rate pricing, no surprises.
What Our Customers Say
Don't just take our word for it — hear from our satisfied customers
★★★★★
Ricky Saldana the technician that came out was fantastic. He was so knowledgeable about my plumbing issues and his recommendations were spot on. He was on time and very pleasant to work with. I would highly recommend him for any plumbing work that needs to be done.
Thanks Ricky for all of your input.
★★★★★
Jake was on time and very good about looking at my furnace. I appreciate all his help. I reccomend him and mainstream electric very highly. thank you Sharon Scott
Maintenance Membership
Join the Care Club
Total home service care, on a schedule.
Members get priority scheduling, seasonal HVAC tune-ups, an annual plumbing & electrical safety inspection, and exclusive discounts — for less than the cost of a single emergency call.
- Priority scheduling
- Seasonal HVAC tune-ups
- Annual safety inspection
- Exclusive member discounts
- Free dispatch on repairs
- No long-term contracts
Sewer Services — Frequently Asked Questions
How does a sewer camera inspection work?
We feed an HD camera on a flexible cable through your nearest cleanout and down the sewer line. You watch the video on a screen with our tech, who points out roots, cracks, offsets, bellies, and any other issues. We can also locate the depth and surface position of any problem with an electronic locator. Footage is yours to keep.
Repair, line, or replace — how do you decide?
Camera footage drives the decision. A small crack or offset is usually a spot repair. Multiple issues spread along the line, root intrusion at multiple joints, or scale buildup is usually a trenchless liner. A collapsed pipe, severe belly, or pipe that’s bellied below grade needs replacement — sometimes trenchless, sometimes traditional excavation.
What is trenchless sewer line replacement?
Cure-in-place pipe (CIPP) lining: we install a resin-saturated liner inside your existing sewer line through an existing cleanout. The liner cures in place, creating a brand-new pipe inside the old one — typically warrantied 10–50 years. No digging up the yard, no driveway tear-out.
When does excavation make sense?
When the existing pipe is too damaged to host a liner, when grade needs to be re-set, when there’s a major belly, or when a section needs to be removed entirely. We use the smallest dig that gets the job done — and our crew handles backfill, compaction, and surface restoration.
Will my landscaping survive?
Trenchless lining typically requires only an access pit at one or two points — most landscaping stays intact. Open excavation requires a trench, and we restore lawn, sod, and hardscape as part of the scope. We’ll walk you through what to expect and show you photos of similar projects before we start.
How long does a sewer replacement take?
Trenchless liners are typically installed in a single day. Open-trench replacements run 1–3 days depending on length and depth. Full excavation with surface restoration can take 3–5 days. We give you a fixed schedule with the quote.
What's warrantied?
Camera inspections and spot repairs include a 1-year Mainstream labor warranty. CIPP liners come with a 10–50 year manufacturer warranty depending on the system. Sewer line replacements include both labor and pipe warranties — we put it all in writing before work starts.
Is financing available for big sewer jobs?
Yes. Sewer line work is one of the largest plumbing projects most homeowners ever face — we offer flexible financing, including 0% APR for qualified buyers. Our team walks through the options during the quote.
*Offers cannot be combined with other promotions or applied to dispatch fees. No cash value. Must present offer at time of service. Call for details.
