Slow Drains

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Serving the Greater Seattle Area

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Rated 5 Stars by Mig L. on Google

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"I had a severe clog, and the technician, Sergio, quickly ran diagnostics and identified the problem right away. He was able to clear the line efficiently and professionally. I would definitely recommend Bob Oates Plumbing and Sewer — they were easy to work with and very professional."

Do you have issues with slow drains on your Seattle-area property? If so, reach out to us at Bob Oates Plumbing, Sewer & Rooter anytime. We will come out, inspect your pipes, and quickly identify the problem.

Once we diagnose the issue, we’ll provide you with clear solutions and transparent pricing to get the job done right. Our team of experienced, trusted plumbing professionals is here to help you, no matter what type of plumbing problem you are facing, including slow drains.

What Causes Slow Drains?

Your drains can slow down for several reasons. The most common causes include:

  • Old Pipes: Aging pipes can struggle with corrosion or develop weak spots, leading to slow drainage.
  • Buildup Inside Pipes: Over time, substances like paper products, chemicals, and even corrosion itself can cause a buildup that restricts water flow.
  • Partial Clogs: While you may not see a clog, debris or other materials can accumulate over time, slowing drainage if your pipes haven’t been cleaned recently.
  • Cracked or Collapsed Pipes: A damaged pipe can hinder water flow, as anything going down the drain has more obstacles to pass through before exiting the system.

Identifying and addressing these issues early on can prevent more severe plumbing problems. We’ve written a separate blog post dedicated entirely to the importance of clean drains.

Bob Oates technician snaking a customer’s drain line during a service call

A Bob Oates technician uses professional drain snaking equipment to clear a customer’s line.

How Bob Oates Repairs Slow Drains

To effectively repair slow drains, it’s essential to first identify the root cause. During a drain inspection, we typically use a specialized camera to examine the condition of your pipes. This remote-controlled camera provides a clear view inside the pipe, helping us detect clogs, cracks, or any tree root invasions. Once we have a precise diagnosis, we can determine the most appropriate repair method for your situation.

Should we find a clog, options to remedy the problem include using cabling or high-pressure water jetting to clear the blockage and ensure smooth water flow. In cases where the pipe is damaged or cracked, we may recommend sewer pipe relining or, if necessary, replacing the pipe.

Bob Oates technician holding tree roots removed from a residential sewer line

Tree roots extracted from a sewer pipe after clearing a major blockage.

Tree Roots

If tree roots have infiltrated the pipe, not to worry! The team at Bob Oates knows exactly how to tackle roots in pipes. We will discuss your options, which could range from cutting the roots to using trenchless sewer pipe repair to replace the pipe entirely, depending on the severity of the issue. Our goal is to provide you with a solution tailored to the specific problem.

Bob Oates Plumbing technician standing beside a service truck during a residential plumbing and sewer service call in Seattle

A Bob Oates Plumbing, Sewer & Rooter technician arrives at a Seattle-area home for a residential plumbing and sewer service appointment.

Let Us Restore Your Pipe Flow Today

Slow drains aren't just a nuisance — they often signal a larger issue with your plumbing. It’s important to recognize the warning signs that your pipes may be struggling.

Give us a call or contact the expert team at Bob Oates Plumbing, Sewer & Rooter. We’ll inspect your pipes, diagnose the problem, and provide solutions, helping you take proactive steps to maintain proper flow and prevent future issues!

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Our locally dispatched crews serve homes and businesses across King, Snohomish, and Pierce Counties, including:

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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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Stephanie Almeida
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Today it was Henry’s turn to save the day! We discovered after an appraisal that we needed to have earthquake straps attached to our water heater, and he came out within 24 business hours and took care of everything we needed. He did it with a smile, and he did it with excellent customer service. We are never going to call anyone else with plumbing issues - this company surpasses all of our wildest dreams of amazingness! Before and after photos attached!! The whole thing took about 40 minutes from hello to goodbye!
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Cindy Harper
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We've been Bob Oates customers for a few years, and today Konrad provided excellent service locating a water leak in our home. He is a great communicator and I learned a lot as he described his approach to identifying and solving our problem. Also, even though he had to cut into our wall, he did it in a way that makes it easier for us to repair. It's nice to have a reliable go-to person to call on when we need plumbing help. Update: we had Konrad back last week to replace a faucet, and he's still doing great work! Thank you, Konrad!
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B P
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Highly recommended. I had 3 companies come out to give me a quote for preventative clearing of outdoor drain lines. Mike from Bob Oates was the only one who actually opened the drain covers and used a camera to give me a fair assessment of what needed to be addressed, what considerations and complications there might be, and a realistic price quote. Other companies sent more of a salesperson with quotes of thousands of dollars to clear drain lines that they weren't even sure needed to be cleared or could be addressed through the methods quoted. Mike from Bob Oates was knowledgeable, helpful and trustworthy where other companies felt like they were just trying to sell me something.
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Angela alegna
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Prescott has been great to work with. He is extremely attentive and follow-ups promptly on our projects with him.
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Brent Compton
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We have had a great experience using Bob Oats Plumbing. Oliver was especially professional, courteous, and very responsive. I would highly recommend them.
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Kris Boudreaux
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I never thought I would call a plumber a Rockstar but. Henry at Bob Oates plumbing truly is! This company is outstanding. The polite, patient receptionist got me an appointment in one day even though I knew they had no openings. Henry was on time and completed the work in less than an hour. On top of that he is a nice guy to be around. I know my old house has some major plumbing issues coming up in the future - I feel very fortunate to have found this company who I will call with no hesitation!
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Cindy
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great service. when i called late on a saturday i actually got the owners daughter who answers the phones herself even late on the weekend . i was able to get someone to come out in the hour and stop the back up. price was decent and upfront . no surprises
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Alyson Mosher
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We had an emergency clog that turned into a big time sewer line repair job, and the Bob Oates team was timely, thorough, and helpful throughout. Prescott was a great project manager and kept us updated and informed the entire process. We're so glad we contacted them first!

5 Plumbing Tips for Fall

By Bob Oates | October 22, 2026

Fall brings cooler temperatures, heavier rainfall, and falling leaves to the Seattle area. It’s also an excellent time for homeowners to check their plumbing, drainage, and sewer systems before winter arrives. A little preventive maintenance now can help reduce the risk of clogged drains, sewer backups, water damage, and unexpected plumbing repairs. At Bob Oates…

Everything to Know About the Trenchless Pipe Lining Process

By Bob Oates | October 14, 2026

Traditional sewer repairs often require extensive excavation, disrupting lawns, landscaping, driveways, and sidewalks. Modern trenchless pipe lining offers a faster, cleaner alternative, restoring damaged underground pipes with little or no digging. At Bob Oates Plumbing, Sewer & Rooter, our experienced crews use advanced trenchless technology to rehabilitate aging sewer lines throughout the Greater Seattle area.…

Common Drain Issues You Can Avoid

By Bob Oates | October 8, 2026

Most drain problems develop gradually. Grease, soap residue, hair, food particles, and other debris accumulate inside pipes over time, restricting water flow and eventually creating blockages. The good news is that many common drain issues are preventable. A few practical habits, along with timely maintenance and professional drain cleaning when needed, can help keep your…

A Closer Look at the Pipe Lining Process

By Bob Oates | October 5, 2026

Sewer pipe lining may appear straightforward once the job is finished: a damaged sewer line becomes a smooth, seamless pipe without the extensive excavation required for traditional replacement. What happens behind the scenes is in fact extremely precise. Also known as cured-in-place pipe (CIPP) lining, the process requires careful inspection, cleaning, measurement, resin preparation, liner…

Don’t Get Frozen in the Winter Months: Maintain Your Water Heater Today

By Bob Oates | September 27, 2026

As fall and winter approach, so do many family holidays. Thanksgiving, Christmas, and New Year’s Eve are the perfect occasions for friends and relatives to visit, and many times they will stay as guests in the house for a few days. This means that more people will be using hot water for washing laundry, dishes,…

Advantages of Trenchless Sewer Replacement

By Bob Oates | September 25, 2026

Replacing a damaged sewer line doesn’t always mean digging a trench across your property. Modern trenchless sewer pipe repair and replacement methods can restore underground pipes with minimal excavation, helping homeowners avoid much of the disruption, expense, and property damage associated with traditional sewer replacement. Depending on the condition of the existing line, trenchless solutions…

What Happens When Drain Cleaning Is Neglected?

By Bob Oates | September 23, 2026

Your drains handle wastewater every day, and normal use gradually leaves grease, food particles, hair, soap residue, and other material behind. Without occasional drain cleaning, that buildup accumulates, restricts water flow, and makes drainage problems increasingly difficult to ignore. Neglecting drain cleaning doesn’t mean every plumbing system will develop the same problem on the same…

Recurring Clogs and Their Causes

By Bob Oates | September 22, 2026

Clearing a clogged drain is one thing. Having the same drain clog again a few weeks later is another. A recurring clog often means that the original blockage wasn’t completely removed — or that another problem inside the drain or sewer line is causing it to return. Instead of repeatedly treating the symptom, identifying the…

Tips on Dealing With Clogged Drains

By Bob Oates | September 18, 2026

A clogged drain is frustrating, but some simple blockages can be cleared at home without calling a plumber. Below, the team at Bob Oates has assembled some pro tips for dealing with clogged drains. Before you start, take stock of what’s happening: if several drains are slow or clogged, wastewater is backing up into another…

Are Plumbing Inspections Important For Homeowners?

By Bob Oates | September 17, 2026

Yes! A professional plumbing inspection is an important part of understanding the condition of your home’s plumbing and catching potential problems before they turn into expensive repairs. A comprehensive inspection looks beyond faucets and fixtures. At Bob Oates Plumbing, Sewer & Rooter, that means evaluating key components throughout the home — including pipes, toilets, water…

CALL (206) 789-4944

Serving the Greater Seattle Area