Water Main Repair in Seattle, WA, and Surrounding Areas

Washington State favicon with star for Seattle

CALL (206) 789-4944

Serving the Greater Seattle Area

Rated 5 Stars by John H. via Yelp.com

John H., another satisfied Bob Oates customer, smiling while looking at the camera

"TJ, Joe, and the crew at Bob Oates were awesome in helping restore water service to our home when the water main between street + crawl space burst underground, flooding our garage. They acted quickly, thoroughly, and left our home in arguably better condition than before the pipe burst."

Seattle’s Water Pipe Service Leaders

When the main water line to your home is damaged or leaking, it can quickly become a serious problem. Underground water main issues often lead to low water pressure, soggy areas in the yard, unexpected spikes in your water bill, or even structural damage if left untreated.

At Bob Oates Plumbing, Sewer & Rooter, our experienced technicians specialize in diagnosing and repairing water main problems quickly and efficiently. For more than 35 years, homeowners across Seattle and the surrounding communities have trusted our family-owned company to restore their water service safely and reliably.

Three Bob Oates Plumbing, Sewer & Rooter technicians standing beside company service vehicles during a residential service call in the Seattle area.

Delivering plumbing solutions with a smile! Bob Oates technicians on-site for a service call in Greater Seattle.

Whether your water line needs a targeted repair or full replacement, our team will inspect the system, explain your options clearly, and provide an honest estimate before any work begins.

Signs Your Water Main May Need Repair

Water main leaks often start underground, which means the warning signs can be subtle at first. If you notice any of the following symptoms, it’s important to have a professional inspection as soon as possible.

Common signs of a failing water main include:

Sudden drops in household water pressure
Unexplained increases in your water bill
Wet or soggy areas forming in your yard
Rust-colored or cloudy tap water
The sound of running water when fixtures are off
Cracks in foundations, walls, or pavement

Even a small leak in the main water line can waste thousands of gallons of water and cause extensive property damage over time. Early detection helps prevent costly repairs and protects your home’s plumbing system.

New residential water service line installed in an excavated trench in Seattle

A new residential water service line is installed through a carefully excavated trench as part of a full water line replacement.

Residential water line replacement trench running through a Seattle property

A replacement water service line runs through the property toward the home during a residential water line repair project.

Professional Water Main Leak Detection

Locating a water main leak used to require digging large sections of the yard to find the problem. Today, advanced diagnostic tools allow our technicians to pinpoint leaks quickly with minimal disruption.

At Bob Oates, we use specialized equipment such as acoustic leak detection devices and electronic pipe locating technology to track down underground leaks. These tools allow us to identify the exact location of the problem without unnecessary excavation.

Once the leak is located, we’ll review your repair options and recommend the most effective solution for your property.

Water Main Repair and Replacement Options

Every property is different, and the best repair method depends on the condition of your existing water line. Our technicians evaluate the pipe material, location, and extent of damage before recommending the most reliable solution.

Bob Oates technician locating the water service connection during a residential water line replacement in Seattle

A Bob Oates technician locates the connection between a homeowner’s private water service line and the city water supply during a full water line replacement in Seattle.

Targeted Water Line Repair

If the leak is limited to a specific section of pipe, we may be able to perform a focused repair to restore service quickly. This approach minimizes disruption and can often be completed the same day.

Trenchless Water Line Replacement

In many cases, older or severely damaged water mains benefit from trenchless replacement. Using modern boring equipment — sometimes called a hydraulic mole — we can install a new water line underground with minimal digging.

This trenchless approach allows us to replace the pipe beneath lawns, sidewalks, and driveways without tearing up the entire yard.

Benefits of trenchless water line replacement include:

Minimal disruption to landscaping
Faster installation compared to traditional excavation
Durable, long-lasting pipe materials
Lower restoration costs after the repair

Common Causes of Water Main Damage

Underground water lines can last for decades, but several factors can eventually cause them to fail. In the Seattle area, many water main issues are related to aging infrastructure and soil conditions.

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

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

Some of the most common causes include:

Corrosion in older galvanized or metal pipes
Shifting soil or ground movement
Tree root intrusion near underground lines
Pipe deterioration due to age
Freezing temperatures during winter cold snaps

A professional inspection can determine the exact cause of the problem and help prevent future issues.

Why Seattle Homeowners Choose Bob Oates

When a water main fails, you need a plumbing company with the experience and equipment to resolve the problem quickly.

For more than three decades, Bob Oates Plumbing, Sewer & Rooter has been helping homeowners throughout the Greater Seattle area protect their homes from plumbing and water line damage.

Here’s why:

Experienced technicians with decades of plumbing expertise
Advanced leak detection equipment for accurate diagnostics
Trenchless repair options that reduce property disruption
Honest estimates and second opinions before any work begins
Family-owned service focused on long-term customer relationships

Our locally dispatched crews respond quickly across Seattle and the surrounding communities to diagnose water line issues and restore reliable water service.

Bob Oates underground crew standing with General Manager John Peterson in front of a company service van outside the Bob Oates shop in Pacific, WA.

The Bob Oates underground team with GM John Peterson after another successful sewer repair job.

Water Main Inspections Help Prevent Major Repairs

Many water main failures begin with small leaks that go unnoticed for months or even years. Routine inspections can help identify early warning signs before they turn into major problems.

During an inspection, our technicians evaluate the condition of your water line and check for pressure irregularities, corrosion, or underground leaks. Identifying these issues early can help homeowners avoid emergency repairs and expensive property damage later.

If you suspect a problem with your water service line, our team can provide a thorough inspection and recommend the best solution.

Bob Oates Excavation Division truck at a residential service call in Seattle

A Bob Oates Plumbing, Sewer & Rooter Excavation Division truck on site for a residential service call in Seattle.

Serving the Greater Seattle Area

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

Contact us today or fill out our online form to learn more about the services we offer! And be sure to check out Cleaner Magazine’s profile of Bob, the man behind the company!

FAQs About Water Main Repair

What are the warning signs of a failing water main?

Look for clues such as pooled or soggy ground, discolored or rusty water, inconsistent or low water pressure, unexpected spikes on your water bill, and cracks in the foundation, ceiling, or walls.

How does Bob Oates locate water main leaks without digging?

We use advanced, non-invasive leak detection tools — like sensitive acoustic listening devices and pipe tracing — to pinpoint leaks without extensive excavation, then share your repair options.

What is trenchless water main repair, and why does it matter?

Trenchless repair uses directional boring (e.g., hydraulic mole) to install or replace lines beneath your yard or driveway without digging trenches — faster, cleaner, and far less disruptive than traditional excavation.

Can trenchless be used for broken water mains in Seattle?

Yes — when conditions allow. Trenchless repair is ideal for replacing failing mains with minimal disturbance. We evaluate your situation and recommend the best approach.

Is water main repair urgent?

Absolutely. Even small leaks can escalate quickly, damaging property, increasing mold risk, and driving up your utility costs substantially.

Coupon for $200 off trenchless water main replacement

Proud Member of BOMA

      EXCELLENT  
   Based on 773 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Stephanie Almeida 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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!
  
 
      Posted on Google  
   
   Cindy Harper 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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!
  
 
      Posted on Google  
   
   B P 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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.
  
 
      Posted on Google  
   
   Angela alegna 
 
 
 
 Trustindex verifies that the original source of the review is Google. Prescott has been great to work with. He is extremely attentive and follow-ups promptly on our projects with him.
  
 
      Posted on Google  
   
   Brent Compton 
 
 
 
 Trustindex verifies that the original source of the review is Google. We have had a great experience using Bob Oats Plumbing. Oliver was especially professional, courteous, and very responsive. I would highly recommend them.
  
 
      Posted on Google  
   
   Kris Boudreaux 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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!
  
 
      Posted on Google  
   
   Cindy 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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
  
 
      Posted on Google  
   
   Alyson Mosher 
 
 
 
 Trustindex verifies that the original source of the review is Google. 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!

Plumbing Nightmares and How to Avoid Them

By Bob Oates | October 27, 2026

Happy Halloween from Bob Oates Plumbing, Sewer & Rooter! Halloween season is here — the perfect time for a few scary stories. But instead of ghosts or ghouls, I’m sharing something truly terrifying: real-life plumbing nightmares from my time on the job. Each one of these situations could have been avoided with a bit of…

Dry yellow fallen leaves on a sewer hatch

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…

Sewer lining crew preparing liner during a full sewer rehabilitation project in Ballard, Seattle

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.…

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

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…

Bob Oates technician preparing a sewer liner before trenchless sewer repair in the Greater Seattle area

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…

Newly installed Rheem gas water heater by Bob Oates Plumbing inside a Seattle home closet.

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,…

Bob Oates Plumbing, Sewer & Rooter Pipe Lining Division trailer with Poopy the Plunger mascot in Seattle

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…

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

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…

Section of sewer pipes clogged with grease and fat

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…

Modern white kitchen sink with brass faucet and clean countertop

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…

CALL (206) 789-4944

Serving the Greater Seattle Area

Book Appointment Online

Water Main Repair in Seattle, WA, and Surrounding Areas

CALL (206) 789-4944

Seattle’s Water Pipe Service Leaders

Signs Your Water Main May Need Repair

Professional Water Main Leak Detection

Water Main Repair and Replacement Options

Targeted Water Line Repair

Trenchless Water Line Replacement

Common Causes of Water Main Damage

Why Seattle Homeowners Choose Bob Oates

Water Main Inspections Help Prevent Major Repairs

Serving the Greater Seattle Area

FAQs About Water Main Repair

What are the warning signs of a failing water main?

How does Bob Oates locate water main leaks without digging?

What is trenchless water main repair, and why does it matter?

Can trenchless be used for broken water mains in Seattle?

Is water main repair urgent?

Plumbing Nightmares and How to Avoid Them

5 Plumbing Tips for Fall

Everything to Know About the Trenchless Pipe Lining Process

Common Drain Issues You Can Avoid

A Closer Look at the Pipe Lining Process

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

Advantages of Trenchless Sewer Replacement

What Happens When Drain Cleaning Is Neglected?

Recurring Clogs and Their Causes

Tips on Dealing With Clogged Drains

CALL (206) 789-4944

NAVIGATE

OUR SERVICES

SERVICE AREAS