Top-rated tankless water heater installers.

Get matched with top tankless water heater installers 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 installers in Black Diamond

Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
3510 S Pine Street
4.71(
867
)
•
Approved Pro
Harts Plumbers, Electricians, & HVAC Technicians
3510 S Pine Street
4.71(
867
)
•
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
527 local quotes requested

Harts is your trusted local provider for all your plumbing and electrical 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. Trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"EV charger install in garage. Harts was very timely and able to do the service during the estimate visit. Josh, our service tech, was fantastic. He was quick but thorough and detailed, and also very pleasant. Highly recommend and will use them again."

Eric L on March 2025

Harts is your trusted local provider for all your plumbing and electrical 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. Trust Harts Plumbers, Electricians, & HVAC Technicians for professional and friendly service for all your plumbing, electrical, & HVAC projects. Call us today!

"EV charger install in garage. Harts was very timely and able to do the service during the estimate visit. Josh, our service tech, was fantastic. He was quick but thorough and detailed, and also very pleasant. Highly recommend and will use them again."

Eric L on March 2025


Avatar for Rescue Rooter Seattle
Rescue Rooter Seattle
175A Roy Rd SW, Suite 101
4.74(
111
)
•
Approved Pro
Rescue Rooter Seattle
175A Roy Rd SW, Suite 101
4.74(
111
)
•
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
363 local quotes requested

The emergency specialists at Rescue Rooter are your best source for comprehensive plumbing and drain cleaning services. You don't have to put up with slow drains, broken water heaters, leaking pipes, or dripping faucets. Our team of emergency specialists can repair your plumbing problems and keep your home or business running smoothly. We can arrange an appointment to fit your schedule. Plus, 60-minute emergency service is available. Remember, "Nobody handles your plumbing disaster faster."

"Tre got everything taken care of quickly for me and was able to root out the problem, no issues!"

Christopher B on July 2025

The emergency specialists at Rescue Rooter are your best source for comprehensive plumbing and drain cleaning services. You don't have to put up with slow drains, broken water heaters, leaking pipes, or dripping faucets. Our team of emergency specialists can repair your plumbing problems and keep your home or business running smoothly. We can arrange an appointment to fit your schedule. Plus, 60-minute emergency service is available. Remember, "Nobody handles your plumbing disaster faster."

"Tre got everything taken care of quickly for me and was able to root out the problem, no issues!"

Christopher B on July 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 G&I Plumbing
G&I Plumbing
1540 29th St SE Apt B
5.00(
7
)
•
Approved Pro
G&I Plumbing
1540 29th St SE Apt B
5.00(
7
)
•
Approved Pro
2 years of experience
Emergency services offered

G&I Plumbing is a trusted plumbing service provider based in Auburn, WA, with nearly a decade of experience in the industry. Our team of skilled professionals is dedicated to delivering top-notch plumbing solutions for both residential and commercial clients. We specialize in a wide range of services, including: Emergency Plumbing Repairs: Drain Cleaning and Maintenance: Water Heater Installation and Repair: Pipe Installation and Repair: Fixture Installation: Professional installation of faucets, sinks, toilets, and more. At G&I Plumbing, we pride ourselves on our commitment to customer satisfaction, offering prompt and courteous service with a focus on quality workmanship. Our experienced technicians use the latest tools and techniques to ensure every job is completed to the highest standards. Whether you're dealing with a minor leak or a major plumbing project, you can count on G&I Plumbing to provide reliable and affordable solutions.

"Was totally professional and efficient. Did a great job installing product."

Richard e B on July 2025

G&I Plumbing is a trusted plumbing service provider based in Auburn, WA, with nearly a decade of experience in the industry. Our team of skilled professionals is dedicated to delivering top-notch plumbing solutions for both residential and commercial clients. We specialize in a wide range of services, including: Emergency Plumbing Repairs: Drain Cleaning and Maintenance: Water Heater Installation and Repair: Pipe Installation and Repair: Fixture Installation: Professional installation of faucets, sinks, toilets, and more. At G&I Plumbing, we pride ourselves on our commitment to customer satisfaction, offering prompt and courteous service with a focus on quality workmanship. Our experienced technicians use the latest tools and techniques to ensure every job is completed to the highest standards. Whether you're dealing with a minor leak or a major plumbing project, you can count on G&I Plumbing to provide reliable and affordable solutions.

"Was totally professional and efficient. Did a great job installing product."

Richard e B on July 2025


Avatar for Beacon Plumbing & Mechanical INC
Beacon Plumbing & Mechanical INC
515 7th Ave S
5.00(
6
)
•
Approved Pro
Beacon Plumbing & Mechanical INC
515 7th Ave S
5.00(
6
)
•
Approved Pro
Customers say: Quick response
29 local quotes requested
26 years of experience

Beacon Plumbing 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.

"The tech explained everything and was very polite."

Michelle B on April 2025

Beacon Plumbing 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.

"The tech explained everything and was very polite."

Michelle B on April 2025


Avatar for Eco SmarTiles Inc.
Eco SmarTiles Inc.
Suite 0037, 3937 Factoria Square Mall SE
5.00(
1
)
•
Approved Pro
Eco SmarTiles Inc.
Suite 0037, 3937 Factoria Square Mall SE
5.00(
1
)
•
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
445 local quotes requested

As a member of the MASTER BUILDERS ASSOCIATION of King and Snohomish County, Eco SmarTiles Inc provides beautiful, efficient and intelligent heated flooring solutions. Our heated tiles are UL listed and FCC certified. As a general contractor, we also have years of expertise in the following areas: remodeling, flooring, painting, demolition and more. Website: https://ecosmarttiles.com

"The work was done quickly and efficiently. It is such a pleasure to have a nice toasty floor on those cold mornings 😀"

Jian c on December 2024

As a member of the MASTER BUILDERS ASSOCIATION of King and Snohomish County, Eco SmarTiles Inc provides beautiful, efficient and intelligent heated flooring solutions. Our heated tiles are UL listed and FCC certified. As a general contractor, we also have years of expertise in the following areas: remodeling, flooring, painting, demolition and more. Website: https://ecosmarttiles.com

"The work was done quickly and efficiently. It is such a pleasure to have a nice toasty floor on those cold mornings 😀"

Jian c on December 2024


Avatar for Luxury Bath of Seattle Inc
Luxury Bath of Seattle Inc
18388 REDMOND WAY
4.42(
60
)
•
Approved Pro
Luxury Bath of Seattle Inc
18388 REDMOND WAY
4.42(
60
)
•
Approved Pro
Customers say: Quality work
1630 local quotes requested
24 years of experience

Are you looking for home improvement or bathroom remodeling advice? Luxury Bath is privately owned and been in business for over 15 years. It is the number one trusted resource for customers looking to update their bathroom or have a complete bathroom remodel. If you’re wanting advice on how to make your bathroom larger, how to remodel on a budget, or even looking for a local bathroom remodeler, Luxury Bath has the answers to all your remodeling questions. Open showroom available in Redmond too!!!!

"Don't work with Luxury Bath of Seattle!! Contacted Luxury Bath about remodeling two bathrooms at my property. Carlos Bezerra, Director of Operations, came to provide the bid. He diverted the work to his own company, Handy Buddy LLC, after indicating it was part of Luxury Bath. Corresponded with me via the entire project using his Luxury Bath e-mail. The project required significant rework and I had to finish a portion because he wouldn't fix some final items. 2 years later the work performed failed and I am now in the process of having it redone by a different contractor. Attempted to speak with Luxury Bath of Seattle owner, Raz Gunderman, numerous times. However, he has avoided all my attempts at communication. I have now had to obtain a lawyer to pursue a refund. Extremely dissatisfied."

Scott C on November 2022

Are you looking for home improvement or bathroom remodeling advice? Luxury Bath is privately owned and been in business for over 15 years. It is the number one trusted resource for customers looking to update their bathroom or have a complete bathroom remodel. If you’re wanting advice on how to make your bathroom larger, how to remodel on a budget, or even looking for a local bathroom remodeler, Luxury Bath has the answers to all your remodeling questions. Open showroom available in Redmond too!!!!

"Don't work with Luxury Bath of Seattle!! Contacted Luxury Bath about remodeling two bathrooms at my property. Carlos Bezerra, Director of Operations, came to provide the bid. He diverted the work to his own company, Handy Buddy LLC, after indicating it was part of Luxury Bath. Corresponded with me via the entire project using his Luxury Bath e-mail. The project required significant rework and I had to finish a portion because he wouldn't fix some final items. 2 years later the work performed failed and I am now in the process of having it redone by a different contractor. Attempted to speak with Luxury Bath of Seattle owner, Raz Gunderman, numerous times. However, he has avoided all my attempts at communication. I have now had to obtain a lawyer to pursue a refund. Extremely dissatisfied."

Scott C on November 2022


Prestige Flooring Design
Based Out Of
New on HomeAdvisorNew on Angi•
Approved Pro
Prestige Flooring Design
Based Out Of
New on AngiNew on HomeAdvisor•
Approved Pro
1053 local quotes requested
6 years of experience

We offer a variety of remodeling services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

We offer a variety of remodeling services. We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality of work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!


Avatar for Gravity Builders Llc
Gravity Builders Llc
17422 108 Ave. SE
5.00(
13
)
•
Approved Pro
Gravity Builders Llc
17422 108 Ave. SE
5.00(
13
)
•
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1699 local quotes requested

We specialize in homebuilding and complete yards transformations

"Did a great job. Would definitely hire them again. Had driveway and back patio replaced. Great customer service and got the job done ahead of schedule."

stacy d on May 2025

We specialize in homebuilding and complete yards transformations

"Did a great job. Would definitely hire them again. Had driveway and back patio replaced. Great customer service and got the job done ahead of schedule."

stacy d on May 2025


Avatar for Final Touch Showroom Cabinet, Stone
Final Touch Showroom Cabinet, Stone
13850 Bel-Red RD
New on HomeAdvisorNew on Angi•
Approved Pro
Final Touch Showroom Cabinet, Stone
13850 Bel-Red RD
New on AngiNew on HomeAdvisor•
Approved Pro
1259 local quotes requested
3 years of experience

With FT Showroom & Design Center, experience the difference of a home crafted to be a masterpiece of sophistication and style. Let us take you on a journey from concept to completion, ensuring that every detail reflects your unique vision and lifestyle. We believe in ensuring that your home is more than just a living space; it showcases your vision, brought to life with our unparalleled expertise and passion for design. Experience and create with us, and see how we make your dream home a reality.

With FT Showroom & Design Center, experience the difference of a home crafted to be a masterpiece of sophistication and style. Let us take you on a journey from concept to completion, ensuring that every detail reflects your unique vision and lifestyle. We believe in ensuring that your home is more than just a living space; it showcases your vision, brought to life with our unparalleled expertise and passion for design. Experience and create with us, and see how we make your dream home a reality.

...
Showing 1-10 of 965

FAQs for tankless water heater installation projects in Black Diamond, WA

Yes, although they have a higher upfront cost compared to traditional units, tankless water heaters can be worth the investment for many homeowners. They heat water on demand, eliminating standby energy losses and leading to 24% to 34% greater energy efficiency for homes using up to 41 gallons of hot water daily. Tankless units last longer—around 20 years with proper maintenance—and require less space than traditional units. They also reduce the risk of leaks and water damage since there's no tank to corrode and fail.

Tankless water heaters, including gas-powered models, do require electricity to operate components like the ignition and control systems. This means they won't function during a power outage. If you live in an area prone to outages and want to ensure a continuous hot water supply, consider installing a battery backup system or generator to keep your tankless water heater running when the power goes out.

You should set your tankless water heater to 120 degrees Fahrenheit for optimal safety and efficiency, as recommended by the U.S. Consumer Product Safety Commission. Setting the temperature at 120 degrees prevents scalding accidents, particularly for children and the elderly, and reduces energy consumption. Temperatures above 140 degrees increase the risk of burns and promote mineral buildup, which can decrease the system's efficiency.

A 20-minute shower uses 50 to 60 gallons of water, assuming a flow rate of 2.5 to 3 gallons per minute. A typical whole-house tankless water heater can produce 4 to 8 gallons of hot water per minute, providing continuous hot water for long showers. By installing low-flow showerheads and reducing shower time, you decrease water consumption and energy costs, maximizing the efficiency of your tankless system.

With proper maintenance, a tankless water heater lasts around 20 years, significantly longer than conventional tank water heaters, which last between 8 and 12 years. Regular inspections and timely repairs can further extend its lifespan. To keep your tankless system operating efficiently, have it inspected or serviced annually and address any minor issues promptly by contacting a local tankless water heater repair service.

The Black Diamond, WA homeowners’ guide to tankless water heater installations
From average costs to expert advice, get all the answers you need to get your job done.
Plumber repairing water heater in the bathroom
Jun 25, 2025
Jun 25, 2025
Budget for water heater flush costs based on factors such as water heater size and type, the plumber’s experience level, related services, and more.
trench being dug to repair sewer main in backyard
•
Jun 21, 2025
Jun 21, 2025
Use this guide to budget for sewer line replacement costs based on factors such as location, trenching, materials, repairs, landscaping, and more.
newly remodeled bathroom with new bath tub
•
Jun 21, 2025
Jun 21, 2025
Budget for bathtub replacement costs based on factors such as bathtub type, material, removal, hardware, labor, plumbing work, and more.
A woman fixing cistern in bathroom
•
Jun 21, 2025
Jun 21, 2025
Use this guide to budget for toilet repair costs based on factors such as problem type, replacement part prices, labor, and more.
A man installs a new shower
Jun 15, 2025
Jun 15, 2025
Looking to remodel your shower? Here’s how much it costs, what factors affect cost, and what to expect.
plumber cleaning a home sewer line in yard
•
Jun 15, 2025
Jun 15, 2025
Budget for main sewer line clog repair costs based on factors such as cleaning method, sewer age, project complexity, permits, labor, and more.
Share project details to get started.