Sewer Line Replacement In Spokane, WA | Mainstream Plumbing

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Sewer Replacement in Spokane & Spokane Valley

A backed up, clogged, or broken sewer line can cause all sorts of issues, from raw sewage backing up into your home to slow flowing drains and more. Failure to fix these issues when they first occur can be costly to repair, which is why you need the Mainstream team on your side.

Your home’s sewer lines run from the municipal sewer lines directly to the pipes in your home. They’re responsible for taking what you flush down the toilet and drain out of your home and to wastewater plants in and around Spokane. 

When something interferes with the natural flow of water out of your home, you might smell sewer gas or deal with backups in your sinks or shower. This is an issue you need the professionals at Mainstream to help tackle today – not tomorrow.

Signs Your Sewer Line Might Need Replacing

The five biggest signs something is going on with your sewer lines include: 



The smell of sewer gas

Mold along the floors or ceilings in your home

Sudden, muddy patches of dirt and grass

Sewer Line Repair vs Replacement

When deciding whether to repair or replace your sewer line, there are a few things to consider. First, a plumber should complete a video camera inspection to find the source of the problem. They’ll be able to determine whether there are small cracks in the pipe, a major clog, tree roots blocking the pipes, etc. 

Once they find the problem with your sewer line, they can assess the damage and its severity to recommend whether you’ll need a repair or total pipe replacement. At Mainstream, our plumbers are experts at diagnosing sewer line issues. You can trust us to accurately detect, diagnose, and repair or replace your home’s sewer lines for long-term performance and peace of mind.

Sewer Line Replacement Methods

Traditional sewer line replacement: Traditional or trenched sewer line replacement is where plumbers have to excavate to get to the problem. 

Trenchless sewer line replacement: During a trenchless replacement, a plumber will insert a new lining inside an existing sewer line. This is also known as cured-in-place pipe (CIPP) replacement or pipe relining.

Check out why your neighbors trust us to get the job done right

So happy with the service and professionalism

We had only requested an estimate to replace the sewer line. Steve not only looked at the line, he cleared a clog and set us up with future maintenance!


Our home is 66 years young and it was time to replace the original water lines and sewer lines. I was amazed that they were able to streamline, fix old plumbing mistakes and make our entire water system user friendly. Thank you Cody, Donovan and the third guy that I can't remember his name. They were all professional, polite and knowledgeable.
Leland H.

Very Professional

It was really shocking the amount of damage our pipes had and mr Johnson helped to explain what the issue was... He worked within our budget and created a couple of quotes with positive solutions. We went with the one we felt was necessary and he worked quickly getting that issue resolved. Very professional and knowledgeable.
Idella K.

Highly Recommend

The entire team was very responsive and nice. Handled scheduling quickly. Process was clearly outlined at multiple points in the job to ensure expectations were being met. Took 48 hours from time I reached out to complete issue resolution. Highly recommend
Jenn C.
Read all our reviews

Call The Spokane Sewer Line Experts

Mainstream is Spokane County's leading experts in all things sewer line repair and replacement. No job is too big or too small for our team to handle.

Call us today at (866) 411-9277 or contact us online to schedule an appointment and tackle any sewer line issues plaguing your home.

Frequently asked questions

It depends. Mainstream will send one of our team members to assess the situation and determine the best course of action.

Depending on where the leak is and the core issue with the sewer line, it may take three to five days to repair or replace.

We’ll work with you on a timeline to ensure this issue is fixed as timely as possible.

Special Offers in Spokane Valley, Washington

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  • Keeps your family safe from carbon monoxide leaks

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