Most Trusted Plumber in Mercer Island, WA

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CALL (206) 789-4944

Serving the Greater Seattle Area

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Mercer Island, WA, holds the unique distinction as being among the most populated islands in the United States. Because of this, the number of sewer systems installed across the community is significant.

With regular maintenance and checkups, the team at Bob Oates Sewer and Rooter maintains the integrity of these systems and ensure that they continue to function without any problems for years to come, keeping your home and business secure.

We offer a full suite of plumbing, sewer and rooter services, including:

Give us a call or schedule an appointment anytime — we look forward to speaking with you!

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Rated 5 Stars by Johanna G.
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"Nothing but great experiences with Bob Oates! Would highly recommend for all your sewer and plumbing needs! Honest, hard working company!"

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High Pressure Water Jetting in Seattle: Do You Need It?

By Bob Oates | April 28, 2026

Clogged drain and sewer lines don’t usually happen overnight. Most problems build slowly — grease, sludge, soap residue, and debris accumulate along pipe walls until water can no longer flow freely. When basic drain clearing isn’t enough, high-pressure water jetting (also known as hydro jetting) is one of the most effective ways to fully restore…

Bob Oates technicians standing by their trucks outdoors

Side Sewer Contractor: Everything You Need To Know

By Bob Oates | April 27, 2026

Bob Oates Plumbing, Sewer & Rooter is a registered side sewer contractor serving the City of Seattle and all surrounding areas. For 30+ years, we have provided comprehensive, cost-effective sewer repair solutions for our friends and neighbors in the community. In this post, we’ll answer questions about exactly what a side sewer is. And we’ll…

Bob Oates Sewer and Rooter work trucks

Is Pipe Lining a Long-Term Solution? What Seattle Homeowners Should Know

By Bob Oates | April 24, 2026

If you’re dealing with sewer line issues, you want more than a temporary fix. Trenchless sewer pipe lining is considered a long-term solution when the existing pipe is structurally sound — and in many cases, it can extend the life of your sewer system by 50 years or more. How Pipe Lining Strengthens Your Sewer…

Bob Oates Plumbing, Sewer & Rooter trucks parked at a residential service call in Seattle

Main Issues We Address With Pipe Lining (Seattle Homeowners Guide)

By Bob Oates | April 22, 2026

Sewer line issues don’t always mean excavation. With trenchless sewer pipe lining, many common pipe problems can be repaired from the inside — avoiding the need to dig up your yard, driveway, or landscaping. At Bob Oates Plumbing, Sewer & Rooter, we use pipe lining to address several of the most frequent sewer issues seen…

Bob Oates technicians preparing a blue CIPP liner for trenchless sewer repair.

How Trenchless Pipe Lining Came To Be (And Why It’s a Go-To Sewer Repair Solution Today)

By Bob Oates | April 13, 2026

Sewer problems are something most homeowners don’t think about — until they’re dealing with a slow drains, backups, or worse. For decades, fixing a damaged sewer line meant one thing: digging. Lawns torn up, driveways broken apart, and days (or weeks) of disruption. Today, there’s a better option. Trenchless sewer repair — including trenchless pipe…

Bob Oates Plumbing, Sewer & Rooter van parked at a residential job site in the Greater Seattle Area, with sewer repair equipment set up nearby.

Do I Need a Video Inspection for My Seattle Sewer Line Repair?

By Bob Oates | April 8, 2026

When something goes wrong with your sewer line, the last thing you want is guesswork. Sewer problems happen underground, out of sight — and without the right tools, it’s nearly impossible to know what’s actually causing the issue. That’s where a professional sewer camera inspection comes in. At Bob Oates Plumbing, Sewer & Rooter, we…

Bob Oates Plumbing crew wearing safety vests and hard hats standing with a company service van and dog

Why Bob Oates Sewer & Rooter Is Your Go-To Seattle Plumber

By Bob Oates | March 29, 2026

Finding a reliable plumber in Seattle isn’t just about fixing a leak — it’s about trusting someone with your home, your property, and often a significant investment. At Bob Oates Plumbing, Sewer & Rooter, we’ve spent more than 30 years helping homeowners across the Greater Seattle area solve everything from clogged drains to full sewer…

Bob Oates work truck parked near Lake Union with Seattle skyline in the background.

When Is Sewer Line Replacement Necessary?

By Bob Oates | March 22, 2026

Your sewer line isn’t something you think about every day — until something goes wrong. And when it does, the question becomes clear: Can this be repaired… or does it need to be replaced? While many sewer issues can be fixed with targeted repairs, there are situations where a full sewer line replacement is the…

Young child in Bob Oates sweatshirt practicing plunging a clean toilet.

Clogged Toilet? Here’s How to Fix It (Step-by-Step Guide)

By Bob Oates | March 18, 2026

There’s never a good time for a clogged toilet. Whether your toilet won’t flush, starts backing up, or threatens to overflow right before guests arrive, it’s one of the most stressful plumbing problems homeowners face. The good news? Many toilet clogs can be cleared quickly with the right approach. In this guide, we’ll walk you…

Bob Oates Plumbing, Sewer & Rooter team standing in front of a service van in Seattle

Trenchless Sewer Line Repair: A Modern Solution for Seattle Homes

By Bob Oates | March 15, 2026

If you’re facing sewer line problems, the idea of digging up your yard, driveway, or landscaping can feel overwhelming. Traditional sewer repair often meant deep trenches, heavy machinery, and days of disruption around your home. Fortunately, modern trenchless sewer repair offers a smarter alternative. At Bob Oates Plumbing, Sewer & Rooter, we help homeowners throughout…

Washington State favicon with star for Seattle

CALL (206) 789-4944

Serving the Greater Seattle Area

Book Appointment Online