Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Tankless water heater repair pros in Seattle

Avatar for A to Z Plumbing LLC
A to Z Plumbing LLC
2880 Aegean Ct NE
5.00(
3
)
Approved Pro
A to Z Plumbing LLC
2880 Aegean Ct NE
5.00(
3
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

If you're looking for a company that provides premium products, outstanding service, and beautiful outcomes, then look no further than A TO Z PLUMBING LLC. We work closely with each client to understand their unique needs and preferences, and our commitment to customer satisfaction means we won't rest until you are 100% happy with our work. We offer a range of task's Water tank replacement Water service repair or replacement Repipes Bathroom Tub and shower surround installs Plumbing Renovations Addon Plumbing

"GREAT Company. Alex is very professional and knows what he is doing. They did a perfect job removing old tub/shower installation and installing a new shower. Bath looks great!! Competitively priced too. I highly recommend this company."

Jo A on January 2024

If you're looking for a company that provides premium products, outstanding service, and beautiful outcomes, then look no further than A TO Z PLUMBING LLC. We work closely with each client to understand their unique needs and preferences, and our commitment to customer satisfaction means we won't rest until you are 100% happy with our work. We offer a range of task's Water tank replacement Water service repair or replacement Repipes Bathroom Tub and shower surround installs Plumbing Renovations Addon Plumbing

"GREAT Company. Alex is very professional and knows what he is doing. They did a perfect job removing old tub/shower installation and installing a new shower. Bath looks great!! Competitively priced too. I highly recommend this company."

Jo A on January 2024


Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
2502 196th St SW
4.64(
627
)
Approved Pro
Harts Plumbers, Electricians, & HVAC Technicians
2502 196th St SW
4.64(
627
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
874 local quotes requested

Harts is your trusted local provider for all your plumbing, electrical, and HVAC needs. With 10 years of business experience, our certified team specializes in delivering top-quality residential and commercial solutions in the PNW. From emergency repairs to routine maintenance, we pride ourselves on using the latest technology for efficient diagnostics and repairs, ensuring minimal disruption to your daily life. We are known to pay exquisite attention to detail while making your satisfaction our number one priority. Our company has been serving the local community with dedication and professionalism for over a decade. We specialize in a wide range of services, from intricate electrical installations and repairs to comprehensive plumbing work, including leak detection, pipe repairs, fixture installations, and much more. You can trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"Exceptional Service from Kelsey Asrouch – Highly Recommended! We had the pleasure of working with Kelsey Asrouch, a plumber from Hart’s Services, and the experience was outstanding from start to finish. Kelsey installed three new toilets and cleared a stubborn clog in our kitchen sink air gap—and he did it all with incredible professionalism and skill. He arrived right on time, fully prepared, and walked us through everything he was going to do. His attention to detail was impressive, and he made sure everything was functioning perfectly before he wrapped up. On top of that, he left the work areas spotless—you’d never know a major plumbing job had just taken place. Kelsey was also courteous, respectful, and communicative, making the whole process smooth and stress-free. It’s rare to find a tradesperson who is both technically skilled and a joy to work with, but Kelsey absolutely fits that description. If you’re looking for a top-notch plumber who delivers quality work with great s"

Amit K on July 2025

Harts is your trusted local provider for all your plumbing, electrical, and HVAC needs. With 10 years of business experience, our certified team specializes in delivering top-quality residential and commercial solutions in the PNW. From emergency repairs to routine maintenance, we pride ourselves on using the latest technology for efficient diagnostics and repairs, ensuring minimal disruption to your daily life. We are known to pay exquisite attention to detail while making your satisfaction our number one priority. Our company has been serving the local community with dedication and professionalism for over a decade. We specialize in a wide range of services, from intricate electrical installations and repairs to comprehensive plumbing work, including leak detection, pipe repairs, fixture installations, and much more. You can trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"Exceptional Service from Kelsey Asrouch – Highly Recommended! We had the pleasure of working with Kelsey Asrouch, a plumber from Hart’s Services, and the experience was outstanding from start to finish. Kelsey installed three new toilets and cleared a stubborn clog in our kitchen sink air gap—and he did it all with incredible professionalism and skill. He arrived right on time, fully prepared, and walked us through everything he was going to do. His attention to detail was impressive, and he made sure everything was functioning perfectly before he wrapped up. On top of that, he left the work areas spotless—you’d never know a major plumbing job had just taken place. Kelsey was also courteous, respectful, and communicative, making the whole process smooth and stress-free. It’s rare to find a tradesperson who is both technically skilled and a joy to work with, but Kelsey absolutely fits that description. If you’re looking for a top-notch plumber who delivers quality work with great s"

Amit K on July 2025


Avatar for All Pro Plumbing Northwest, LLC
All Pro Plumbing Northwest, LLC
1902 120th Pl SE STE 102G
4.75(
506
)
Approved Pro
All Pro Plumbing Northwest, LLC
1902 120th Pl SE STE 102G
4.75(
506
)
Approved Pro
Customers say: True professional
137 local quotes requested
31 years of experience

All Pro Plumbing is a locally owned, full-service plumber that has 35 years of experience serving the Puget Sound. We offer expert installation and repair by a team of highly skilled and trained professionals who are the best in the business. As our business grows, we continue to take pride in providing honest work and quality that speaks for itself. The best in town is just a phone call away! **Over the phone quote. General Liability Insurance AM9063777 valid thru 7/01/2018

"Job was done completely. Explained clearly what the fix was and what the cost would be up front."

Jo A on June 2025

All Pro Plumbing is a locally owned, full-service plumber that has 35 years of experience serving the Puget Sound. We offer expert installation and repair by a team of highly skilled and trained professionals who are the best in the business. As our business grows, we continue to take pride in providing honest work and quality that speaks for itself. The best in town is just a phone call away! **Over the phone quote. General Liability Insurance AM9063777 valid thru 7/01/2018

"Job was done completely. Explained clearly what the fix was and what the cost would be up front."

Jo A on June 2025


Avatar for Benjamin Franklin Plumbing
Benjamin Franklin Plumbing
18800 142ND AVENUE NE STE 2A
5.00(
5
)
Approved Pro
Benjamin Franklin Plumbing
18800 142ND AVENUE NE STE 2A
5.00(
5
)
Approved Pro
22 local quotes requested
15 years of experience

Benjamin Franklin Plumbing is one of the premier plumbing service franchises in the U.S., proudly serving communities across the nation for over 20 years. Benjamin Franklin of Redmond, while part of this trusted network, is locally owned and operated. Our plumbers are licensed, background checked, and drug tested. With our industry-leading guarantees and our unwavering commitment to integrity, Benjamin Franklin customers have what most homeowners only dream about: Peace of mind about their plumbing. You can learn more about our guarantees here: https://www.benjaminfranklinplumbing.com/about-us/our-guarantees/

Benjamin Franklin Plumbing is one of the premier plumbing service franchises in the U.S., proudly serving communities across the nation for over 20 years. Benjamin Franklin of Redmond, while part of this trusted network, is locally owned and operated. Our plumbers are licensed, background checked, and drug tested. With our industry-leading guarantees and our unwavering commitment to integrity, Benjamin Franklin customers have what most homeowners only dream about: Peace of mind about their plumbing. You can learn more about our guarantees here: https://www.benjaminfranklinplumbing.com/about-us/our-guarantees/


Avatar for Belred Heating, Cooling & Plumbing, LLC
Belred Heating, Cooling & Plumbing, LLC
10733 47th Place West
4.55(
496
)
Approved Pro
Belred Heating, Cooling & Plumbing, LLC
10733 47th Place West
4.55(
496
)
Approved Pro
Super Service Award
Customers say: True professional
992 local quotes requested
39 years of experience

Since 1986, Bel-Red Energy Solutions, LLC, has been here to help you with products and services that improve your homes' efficiency and comfort, while providing a healthy and safe environment in which to live. Our focus on residential systems gives us one of the most skilled teams, with the best solutions for you and your home. Call today to schedule an appointment! We offer FREE comprehensive estimates on Heating, Air Conditioning or Heat Pump installations.

"Bel-Red installed my new heat pump and furnace in one day. Everything turned out exactly as they described. I would highly recommend."

Mike D on June 2025

Since 1986, Bel-Red Energy Solutions, LLC, has been here to help you with products and services that improve your homes' efficiency and comfort, while providing a healthy and safe environment in which to live. Our focus on residential systems gives us one of the most skilled teams, with the best solutions for you and your home. Call today to schedule an appointment! We offer FREE comprehensive estimates on Heating, Air Conditioning or Heat Pump installations.

"Bel-Red installed my new heat pump and furnace in one day. Everything turned out exactly as they described. I would highly recommend."

Mike D on June 2025


Avatar for Rossco Pipefitters LLC
Rossco Pipefitters LLC
22825 146th Street East
4.78(
182
)
Approved Pro
Rossco Pipefitters LLC
22825 146th Street East
4.78(
182
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
13 local quotes requested

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Great customer service, punctual and a pleasure to communicate with. The work was exceptional, they know their stuff and I will be using their services again!"

Peter C on August 2024

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Great customer service, punctual and a pleasure to communicate with. The work was exceptional, they know their stuff and I will be using their services again!"

Peter C on August 2024


Avatar for Evergreen Plumbing Authority/Water Cleanup
Evergreen Plumbing Authority/Water Cleanup
1421 31st Ave SW
5.00(
6
)
Approved Pro
Evergreen Plumbing Authority/Water Cleanup
1421 31st Ave SW
5.00(
6
)
Approved Pro
Free onsite estimate
Warranties offered

Evergreen Plumbing Authority & Water Cleanup is a trusted provider of plumbing, drain cleaning, sewer, and water mitigation services. With 14 years of industry experience, we proudly serve customers in Pierce County, WA, and the surrounding areas. Our mission is to deliver high-quality, reliable, and fairly priced services while supporting the communities we serve. If we are unable to resolve an issue, we take responsibility and ensure you’re connected with someone who can.

"Received a prompt response for scheduling an appointment. The in person appointment was within the time frame said. Did a major project after reviewing the possibilities available. All the scheduled appointments were right on track and the workers were exceptionally personable and professional. Even finished ahead of predicted timeline. I would definitely hire them again for any plumbing project and would recommend them to anyone without hesitation. So refreshing to have such good service, in all regards."

Linda K on June 2025

Evergreen Plumbing Authority & Water Cleanup is a trusted provider of plumbing, drain cleaning, sewer, and water mitigation services. With 14 years of industry experience, we proudly serve customers in Pierce County, WA, and the surrounding areas. Our mission is to deliver high-quality, reliable, and fairly priced services while supporting the communities we serve. If we are unable to resolve an issue, we take responsibility and ensure you’re connected with someone who can.

"Received a prompt response for scheduling an appointment. The in person appointment was within the time frame said. Did a major project after reviewing the possibilities available. All the scheduled appointments were right on track and the workers were exceptionally personable and professional. Even finished ahead of predicted timeline. I would definitely hire them again for any plumbing project and would recommend them to anyone without hesitation. So refreshing to have such good service, in all regards."

Linda K on June 2025


Avatar for Jafco Company
Jafco Company
14058 Aurora Ave N
4.81(
18
)
Approved Pro
Jafco Company
14058 Aurora Ave N
4.81(
18
)
Approved Pro
Super Service Award
Customers say: True professional
224 local quotes requested
8 years of experience

With 25 years of Industry experience we are here for all your Sewer System needs. From installations to repairs we handle it, and being locally owned and operated means that you get the highest quality service and response time every time. Give us a call today for your Sewer System needs!

"Great communication, timely, respectful, knowledgeable, and so helpful!"

Jamie F on May 2025

With 25 years of Industry experience we are here for all your Sewer System needs. From installations to repairs we handle it, and being locally owned and operated means that you get the highest quality service and response time every time. Give us a call today for your Sewer System needs!

"Great communication, timely, respectful, knowledgeable, and so helpful!"

Jamie F on May 2025


Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
568 Industry Dr Suite 100
4.71(
863
)
Approved Pro
Harts Plumbers, Electricians, & HVAC Technicians
568 Industry Dr Suite 100
4.71(
863
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
15 local quotes requested

Harts is your trusted local provider for all your plumbing, electrical, and HVAC needs. With 10 years of business experience, our certified team specializes in delivering top-quality residential and commercial solutions in the PNW. From emergency repairs to routine maintenance, we pride ourselves on using the latest technology for efficient diagnostics and repairs, ensuring minimal disruption to your daily life. We are known to pay exquisite attention to detail while making your satisfaction our number one priority. Our company has been serving the local community with dedication and professionalism for over a decade. We specialize in a wide range of services, from intricate electrical installations and repairs to comprehensive plumbing work, including leak detection, pipe repairs, fixture installations, and much more. You can trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"Terrible service and experience. AVOID. UNRELIABLE. SCAMMERS. They canceled on me at the last minute, then tried to cancel on me again a week later until I complained. Then someone shows up LATE and did a visual inspection to assess that my furnace is extremely old, everything is faulty or falling apart, likely can not be fixed because parts may not be available, recommends a entirely NEW furnace replacement. Since it is such a HUGE commitment, I declined. I called someone else, they came, fixed it ALL within 30min and said everything is working great. INCOMPETENT SCAMMERS!!"

Peter C on April 2025

Harts is your trusted local provider for all your plumbing, electrical, and HVAC needs. With 10 years of business experience, our certified team specializes in delivering top-quality residential and commercial solutions in the PNW. From emergency repairs to routine maintenance, we pride ourselves on using the latest technology for efficient diagnostics and repairs, ensuring minimal disruption to your daily life. We are known to pay exquisite attention to detail while making your satisfaction our number one priority. Our company has been serving the local community with dedication and professionalism for over a decade. We specialize in a wide range of services, from intricate electrical installations and repairs to comprehensive plumbing work, including leak detection, pipe repairs, fixture installations, and much more. You can trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"Terrible service and experience. AVOID. UNRELIABLE. SCAMMERS. They canceled on me at the last minute, then tried to cancel on me again a week later until I complained. Then someone shows up LATE and did a visual inspection to assess that my furnace is extremely old, everything is faulty or falling apart, likely can not be fixed because parts may not be available, recommends a entirely NEW furnace replacement. Since it is such a HUGE commitment, I declined. I called someone else, they came, fixed it ALL within 30min and said everything is working great. INCOMPETENT SCAMMERS!!"

Peter C on April 2025


Avatar for ALLIANCE PIPEWORKS, LLC
ALLIANCE PIPEWORKS, LLC
2443 N. Lafayette
5.00(
5
)
Approved Pro
ALLIANCE PIPEWORKS, LLC
2443 N. Lafayette
5.00(
5
)
Approved Pro
Free onsite estimate

ALLIANCE PIPEWORKS, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Nick came out to provide an estimate for installing a pressure reducing valve for our high water pressure. He was professional and his estimate was reasonable. He was able to fit me in the next day and came back. as promised, installed the PRV and a new box for it out near the street. It’s working great!!! Will definitely call Nick at Alliance for any future plumbing needs. . "

Heather S on May 2025

ALLIANCE PIPEWORKS, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Nick came out to provide an estimate for installing a pressure reducing valve for our high water pressure. He was professional and his estimate was reasonable. He was able to fit me in the next day and came back. as promised, installed the PRV and a new box for it out near the street. It’s working great!!! Will definitely call Nick at Alliance for any future plumbing needs. . "

Heather S on May 2025

...
Showing 1-10 of 929

FAQs for tankless water heater installation projects in Seattle, WA

Professional flushing services for tankless water heaters run about $200 per visit. This essential maintenance procedure eliminates mineral deposits from critical components, particularly the heat exchanger. While homeowners can purchase DIY flushing kits for $50 to $100, professional service offers the advantage of thorough cleaning with proper techniques. Professional maintenance also includes inspection of additional components that might need attention.

Industry experts and manufacturers recommend annual maintenance for tankless water heaters, with more frequent service (every six months) for homes with challenging water conditions. This regular attention prevents efficiency losses and extends the unit's operational lifespan. Watch for warning signs like reduced water temperature, inconsistent performance, or system error codes that might indicate maintenance is needed sooner than scheduled.

Neglecting regular maintenance allows mineral scale to accumulate within your system, restricting water flow and reducing heating efficiency. This forces your unit to work harder, consuming more energy while delivering less satisfactory performance. Over time, this strain can lead to component failures, inconsistent water temperatures, and premature system replacement. Additionally, most manufacturers require documentation of regular maintenance to honor warranty coverage for major components.

Share project details to get started.