TANKLESS WATER HEATER INSTALLATION

Tankless water heater installs & repairs, Navien & more

Same-day appointments · ★★★★★ 5-Star Google Reviews
Licensed • Bonded • Insured • Residential & Commercial

Tankless Water heater services available - call or text now

TANKLESS WATER HEATER INSTALLATION IN SEATTLE

Looking to install a tankless water heater or replace an existing system? Knockout Plumbing & Mechanical provides professional tankless water heater installation and replacement throughout the greater Seattle area. Our licensed plumbers can help you choose the right system for your home and install it with reliable, code-compliant workmanship.

01. Endless Hot Water

Enjoy continuous hot water, even if multiple fixtures are running at once—no more scheduling showers around the hot water supply..

02. Energy Efficiency

By heating water only when needed, tankless models can significantly lower your utility bills compared to traditional tank systems.

03. Space Saving

Tankless units are compact and can be wall-mounted, freeing up valuable space in your Seattle home.

04. Longer Lifespan

With proper maintenance, tankless water heaters can last 20 years or more, outliving most conventional tank heaters.

Key Benefits of Tankless Water Heaters

When you turn on a hot water tap, cold water flows through the tankless unit and is heated on demand rather than stored in a tank. This provides a continuous supply of hot water while eliminating the need to continuously heat a traditional storage tank.

How Does a Tankless Water Heater Work?

Tankless water heaters can be a great option for homeowners looking for on-demand hot water, a compact system, and improved energy efficiency. Our plumbers can evaluate your home, hot water needs, existing gas or electrical setup, and available space to help determine whether a tankless system is the right fit.   

IS A TANKLESS WATER HEATER RIGHT FOR YOUR HOME?

Ready to explore a tankless water heater for your home? Call or text Knockout Plumbing & Mechanical at (206) 858-2211 or request a free quote online. We’ll help you choose the right system and provide professional tankless water heater installation throughout the greater Seattle area.

Ready to Upgrade?

• Electric Tankless Water Heaters
Ideal for smaller households or point-of-use applications. Often simpler to install, requiring only electrical connections.
•Gas Tankless Water Heaters
Powered by natural gas or propane, these units typically offer higher flow rates, great for larger homes or families with high hot water demands.

Types of Tankless Water Heaters

TANKLESS WATER HEATER INSTALLATION

Professional tankless water heater installation completed by Knockout Plumbing & Mechanical.

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Justin Gerardy
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As a restaurant owner in Seattle, I tend to find it infuriating when tradespeople over charge. It’s a real problem in this city. Knockout was fair and fast. Can’t say how much I appreciate it. I’ll be back for sure.
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Margot Potts
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Zack and his crew were able to come within a couple days of calling and resolved my issue within minutes. They were very friendly and generous - highly recommend!
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Veronica Seifner
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Knockout was great to work with - very courteous, responsive, and fair pricing. Zach came out to cap off a gas line for an appliance we switched to electric. The option was to do it from the inside or from the outside and remove the dedicated pipe altogether. Zach gave reasonable pricing (checked with two other companies) and was able to get the job done right away with expertise and professionalism. Knockout will be our top-choice, first-call for any future pluming needs in our home.
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Mindy Martin
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Excellent experience. I was considering replacing my water heater back in the spring and Knockout was one of the companies I shortlisted to talk to. Ultimately I decided to wait on replacement, but Knockout was definitely at the top of my list. When my water heater started leaking the other day, I immediately reached out to Knockout, and they were able to get me scheduled the next day! I was given the choice between Bradford White and AOS. Zach came out and did a fantastic job. Friendly but professional; quick and efficient but thorough. Knockout respected the quote I was given a few months back which was very competitive. I strongly recommend this company!
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rozap _
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I asked these guys about hydrojetting our old sewer line that would occasionally get clogged. Zach showed up and looked at the situation, and after chatting for a bit he figured I could DIY it so I would know how to do it rather than paying every time it happeened. So he showed me a fitting for my pressure washer I could get, and described what to do. I did all that and it worked great, and I saved $850 that it would have cost, and then I knew how to do it going forward. They didn't even charge me. They're super honest guys with a lot of integrity. Definitely recommend them.
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Jason Franklin
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Colin and his team have completed 2 projects for us and is always very helpful and informative in his diagnosis and explaining his course of action. I highly recommend him and Knock out Plumbing for all your plumbing needs.
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Michael Johnson
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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!
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Simone
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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 ⭐️
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Evan Wiederspan
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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!