Born And Raised Seattleites

Serving Seattle For Over 19 Years

Call us for all your plumbing needs!

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About Us

Knockout Plumbing: A dedicated team of skilled professionals

Knockout Plumbing is a family-owned plumbing company proudly serving Seattle since 2006. We specialize in residential remodels, hot water heaters, sewer repairs, repiping, and fixture installations, — handling everything from routine maintenance to complete plumbing system installs. Whether you’re a homeowner, home builder, or business owner in the Greater Seattle area, our experienced team is committed to providing high-quality, cost-effective service tailored to your needs. With a deep understanding of Seattle homes and a passion for excellence, we’re here to knock it out — every time.

Available for
Emergency Services

Services
01.

Drain Cleaning & Sewer Repairs

Quickly resolve clogs, backups, and damaged sewer lines with professional drain cleaning and sewer repair services. We use hydro jetting, camera inspections, and expert troubleshooting to keep your pipes flowing.

02.

Gas Line Services

From leak detection to full replacements, our certified technicians keep your gas lines running safely and efficiently throughout Seattle.

03.

Water Heater Services

Get reliable hot water fast with our quick, high-quality water heater replacements—installed by Seattle’s trusted plumbing experts.

04.

Remodeling & re-pipe

Planning a kitchen or bath remodel? Need to upgrade old pipes? We handle re-piping and plumbing upgrades for seamless, code-compliant results.

05.

Leak Detection & Pipe Repair

Stop hidden leaks and burst pipes before they cause major damage. We specialize in pinpointing issues quickly and delivering lasting repairs.

06.

5. Sump Pumps & Outdoor Drainage

Protect your property from flooding with reliable sump pump installations and exterior drainage solutions tailored to Seattle’s wet climate.

Testimonials

At Knockout Plumbing, we pride ourselves in our customer service
Simone
Simone
Zach is a consummate professional. He was thorough, timely, efficient, personable, and diligent. He returned the next day after the job to place a cover on a part, which is something my partner & I wouldn’t have known. Clearly, he has integrity, which in my book is paramount. We emphatically would not recommend anyone else, but him and his team for plumbing jobs. We were beyond pleased with Zach’s skill and caliber. 20/10 ⭐️
Simone
Simone
Zach is a consummate professional. He was thorough, timely, efficient, personable, and diligent. He returned the next day after the job to place a cover on a part, which is something my partner & I wouldn’t have known. Clearly, he has integrity, which in my book is paramount. We emphatically would not recommend anyone else, but him and his team for plumbing jobs. We were beyond pleased with Zach’s skill and caliber. 20/10 ⭐️
Evan Wiederspan
Evan Wiederspan
Zack and his crew replaced my kitchen sink drain after it started leaking. I was really happy with the price, and the speed and quality of their work. It was also easy to get a quote and schedule over the phone. I would definitely hire Knockout Plumbing again in the future!
Michael Johnson
Michael Johnson
Zach has done a number of plumbing jobs for us over the years ranging from large bathroom additions to smaller repairs, every time they've been top quality. I highly recommend Knockout!
Balavignesh K.
Balavignesh K.
Knockout Plumbing did a great job installing my new water heater.
 Michael Bacus
Michael Bacus
I got a couple quotes for a rough-in plumbing job on our permitted addition in Bellevue(ADU kitchen, bath and laundry plus water heater and kitchenette). We ended up going with Knockout Plumbing. Zach, Colin, Jon and Shannon were all a pleasure to deal with. They really went out of their way to make sure I was happy. Plumbing passed city inspections on the first inspection. Thanks Knockout 🙂
"Updating since I just used knockout plumbing again. Great service. Diagnosed the issue quickly and charged me minimal for the trip out. Will continue to use. First time: Great service. Came fast. They basically taught me how to use my house as a newer home-owner. And didn’t charge me the full fee since it was a simple task. Gave me tips to prevent issues. Knowledgable so will use again!"
-Jane Murphy
"There is nothing but great things to talk about this experience from beginning to end. I leave a message - Colin calls me back and we discuss the projects. He calmly addresses a plan. We get it scheduled, he shows up, does great work, answers my questions, and leaves everything looking and working great. No hesitation, hands downs, highly recommend Knockout Plumbing!"
-Dale Hoistad
"I had an emergency waterline leak situation. I called several companies. Knockout was the first to respond and came quickly. They were professional, fair, and very communicative throughout the process. I am very happy with how it all turned out. I will call them again in the future."
- Daniel A.

Testimonials

At Knockout Plumbing, we pride ourselves in our customer service
Simone
Simone
Zach is a consummate professional. He was thorough, timely, efficient, personable, and diligent. He returned the next day after the job to place a cover on a part, which is something my partner & I wouldn’t have known. Clearly, he has integrity, which in my book is paramount. We emphatically would not recommend anyone else, but him and his team for plumbing jobs. We were beyond pleased with Zach’s skill and caliber. 20/10 ⭐️
Simone
Simone
Zach is a consummate professional. He was thorough, timely, efficient, personable, and diligent. He returned the next day after the job to place a cover on a part, which is something my partner & I wouldn’t have known. Clearly, he has integrity, which in my book is paramount. We emphatically would not recommend anyone else, but him and his team for plumbing jobs. We were beyond pleased with Zach’s skill and caliber. 20/10 ⭐️
Evan Wiederspan
Evan Wiederspan
Zack and his crew replaced my kitchen sink drain after it started leaking. I was really happy with the price, and the speed and quality of their work. It was also easy to get a quote and schedule over the phone. I would definitely hire Knockout Plumbing again in the future!
Michael Johnson
Michael Johnson
Zach has done a number of plumbing jobs for us over the years ranging from large bathroom additions to smaller repairs, every time they've been top quality. I highly recommend Knockout!
Balavignesh K.
Balavignesh K.
Knockout Plumbing did a great job installing my new water heater.
 Michael Bacus
Michael Bacus
I got a couple quotes for a rough-in plumbing job on our permitted addition in Bellevue(ADU kitchen, bath and laundry plus water heater and kitchenette). We ended up going with Knockout Plumbing. Zach, Colin, Jon and Shannon were all a pleasure to deal with. They really went out of their way to make sure I was happy. Plumbing passed city inspections on the first inspection. Thanks Knockout 🙂

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