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Tankless water heater repair pros in Knoxville

Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
2115 Ona Rd
4.97(
288
)
Approved Pro
Robert Johnson Plumbing
2115 Ona Rd
4.97(
288
)
Approved Pro
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
29 local quotes requested

Robert Johnson has a reputation for being one of the most reliable plumbers in the Hillsborough County area. Robert specializes in water heater installations, service calls, boiler installations, and water softener/filtration system installations. Please do not hesitate to reach out and schedule an appointment today.

"Bob did a great job installing our new water heater! He came out the same day and gave me a very fair estimate, and then was able to come early the next morning and get the job done. He was straightforward and easy to work with. I highly recommend him!"

Nat S on June 2025

Robert Johnson has a reputation for being one of the most reliable plumbers in the Hillsborough County area. Robert specializes in water heater installations, service calls, boiler installations, and water softener/filtration system installations. Please do not hesitate to reach out and schedule an appointment today.

"Bob did a great job installing our new water heater! He came out the same day and gave me a very fair estimate, and then was able to come early the next morning and get the job done. He was straightforward and easy to work with. I highly recommend him!"

Nat S on June 2025


Avatar for Valley Plumbing, Inc.
Valley Plumbing, Inc.
4028 Papermill Dr NW Suite 4
New on HomeAdvisorNew on Angi
Approved Pro
Valley Plumbing, Inc.
4028 Papermill Dr NW Suite 4
New on AngiNew on HomeAdvisor
Approved Pro
61 local quotes requested
3 years of experience

A Good Plumber is not only the name of my company, it is what I am. With years of experience, I provide the utmost in quality, professionalism and integrity to every customer. I tackle anything from the pesky drain clog to a full bathtub/shower install. It is my goal to make every customer happy on every project I complete. I look forward to hearing from you and solving your plumbing problems!

A Good Plumber is not only the name of my company, it is what I am. With years of experience, I provide the utmost in quality, professionalism and integrity to every customer. I tackle anything from the pesky drain clog to a full bathtub/shower install. It is my goal to make every customer happy on every project I complete. I look forward to hearing from you and solving your plumbing problems!


Avatar for The Plumbing Authority, Inc.
The Plumbing Authority, Inc.
1209 Buchanan Ave
4.67(
201
)
Approved Pro
The Plumbing Authority, Inc.
1209 Buchanan Ave
4.67(
201
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
33 local quotes requested

At The Plumbing Authority, we know that you want to be able to relax and not deal with plumbing problems. Undependable plumbing causes you stress and frustration. You deserve to enjoy your home without worrying about your plumbing. This is why we send licensed plumbers out to your home, so that you can relax knowing your problem is in good hands. We do not just care about plumbing. We care about you and your home. We have helped thousands of homeowners solve their plumbing problems for over 29 years. Do not let unexpected plumbing issues ruin your day. Instead, find relief when you call us or schedule online.

"Great work, fast & cleaned up after. Ray & Josh were extremely knowledgeable and explained everything to me. Would definitely hire again."

Susan H on May 2025

At The Plumbing Authority, we know that you want to be able to relax and not deal with plumbing problems. Undependable plumbing causes you stress and frustration. You deserve to enjoy your home without worrying about your plumbing. This is why we send licensed plumbers out to your home, so that you can relax knowing your problem is in good hands. We do not just care about plumbing. We care about you and your home. We have helped thousands of homeowners solve their plumbing problems for over 29 years. Do not let unexpected plumbing issues ruin your day. Instead, find relief when you call us or schedule online.

"Great work, fast & cleaned up after. Ray & Josh were extremely knowledgeable and explained everything to me. Would definitely hire again."

Susan H on May 2025


Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
2115 Ona Road
5.00(
25
)
Approved Pro
Robert Johnson Plumbing
2115 Ona Road
5.00(
25
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
65 local quotes requested

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Bob did a great job! He was timely, explained what needed to be done, had a very fair price, and got the job done quickly. I would hire again without thinking about it!"

Nat S on June 2025

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Bob did a great job! He was timely, explained what needed to be done, had a very fair price, and got the job done quickly. I would hire again without thinking about it!"

Nat S on June 2025


Avatar for Best Deal Plumbing, LLC
Best Deal Plumbing, LLC
5.00(
3
)
Approved Pro
Best Deal Plumbing, LLC
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

Best Deal Plumbing specializes in sewer and water lines, water heaters, new construction and remodeling. Over 15 years of experience.

"They were super professional, punctual, and gave us a great price for replacing our water heater. They made sure everything was working great before leaving, and got the job done efficiently! Would definitely hire them again."

Jessica M on April 2025

Best Deal Plumbing specializes in sewer and water lines, water heaters, new construction and remodeling. Over 15 years of experience.

"They were super professional, punctual, and gave us a great price for replacing our water heater. They made sure everything was working great before leaving, and got the job done efficiently! Would definitely hire them again."

Jessica M on April 2025


Clark Pump Sales and Service
1305 Jones Creek Way
5.00(
1
)
Approved Pro
Clark Pump Sales and Service
1305 Jones Creek Way
5.00(
1
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 local quotes requested

We have the experience and dedication to get the job done right! Specializing in Wells and Pump services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"Excellent."

Billy H on September 2023

We have the experience and dedication to get the job done right! Specializing in Wells and Pump services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"Excellent."

Billy H on September 2023


K & S Construction, LLC
Sevierville, TN And Surrounding
5.00(
1
)
Approved Pro
K & S Construction, LLC
Sevierville, TN And Surrounding
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
228 local quotes requested

K & S Construction is your premier choice for all your construction and excavation needs in Sevierville, TN, and beyond! With over three decades of experience, K & S Construction, led by owner Kevin Keck, brings a legacy of craftsmanship and dedication to every project we undertake. As a second-generation home builder rooted in the heart of Sevier County, Kevin's passion for quality construction runs deep. Construction Division: Whether you're dreaming of your perfect custom home or looking to breathe new life into your existing space with a major renovation, our Construction Division is here to turn your vision into reality. From start to finish, we handle everything with precision and care. Simply bring us your house plan, and we'll build it on your site, ensuring a home you'll cherish for years to come. Excavating Division: Led by Kevin's son, Aaron Keck, our Excavating Division specializes in a wide range of excavation projects. From site clearing to utility installation, septic system repairs to yard grading, our skilled team ensures every aspect of your project is completed with expertise and efficiency. No job is too big or too small for K & S Construction. Whether you're embarking on a new home build, planning a renovation, or in need of excavation services, we're here to exceed your expectations. Contact Kevin @ 865-388-8385 for home-building inquiries or Aaron @ 865-399-6349 for excavating projects. Let's build something incredible together!

"They came out in a timely manner. Worked with the health department very well, and fixed my fill lines in no time. No more poop backing up into my showers"

Tyler K on July 2024

K & S Construction is your premier choice for all your construction and excavation needs in Sevierville, TN, and beyond! With over three decades of experience, K & S Construction, led by owner Kevin Keck, brings a legacy of craftsmanship and dedication to every project we undertake. As a second-generation home builder rooted in the heart of Sevier County, Kevin's passion for quality construction runs deep. Construction Division: Whether you're dreaming of your perfect custom home or looking to breathe new life into your existing space with a major renovation, our Construction Division is here to turn your vision into reality. From start to finish, we handle everything with precision and care. Simply bring us your house plan, and we'll build it on your site, ensuring a home you'll cherish for years to come. Excavating Division: Led by Kevin's son, Aaron Keck, our Excavating Division specializes in a wide range of excavation projects. From site clearing to utility installation, septic system repairs to yard grading, our skilled team ensures every aspect of your project is completed with expertise and efficiency. No job is too big or too small for K & S Construction. Whether you're embarking on a new home build, planning a renovation, or in need of excavation services, we're here to exceed your expectations. Contact Kevin @ 865-388-8385 for home-building inquiries or Aaron @ 865-399-6349 for excavating projects. Let's build something incredible together!

"They came out in a timely manner. Worked with the health department very well, and fixed my fill lines in no time. No more poop backing up into my showers"

Tyler K on July 2024


Avatar for Smoky Mountain Kitchens & Baths
Smoky Mountain Kitchens & Baths
711 Dolly Parton Pkwy # 6341
5.00(
5
)
Approved Pro
Smoky Mountain Kitchens & Baths
711 Dolly Parton Pkwy # 6341
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
92 local quotes requested

We have renovated for over 35 years, as general contractors, real estate investors, landlords, and personal property owners. That depth and range of experience helps us to have a unique perspective on the unrealized potential that every home has. Our goal is to do each project as if we were going to live in the finished home ourselves. We do everything in our power to insure that each of our clients is totally satisfied with their project.

"If you’re looking for a contractor that is prompt, honest, courteous and has an extreme eye for detail, THIS is definitely your guy!"

Shana T on April 2024

We have renovated for over 35 years, as general contractors, real estate investors, landlords, and personal property owners. That depth and range of experience helps us to have a unique perspective on the unrealized potential that every home has. Our goal is to do each project as if we were going to live in the finished home ourselves. We do everything in our power to insure that each of our clients is totally satisfied with their project.

"If you’re looking for a contractor that is prompt, honest, courteous and has an extreme eye for detail, THIS is definitely your guy!"

Shana T on April 2024


ASAP Home Worx, LLC
127 Black Oak Hill Lane
5.00(
1
)
Approved Pro
ASAP Home Worx, LLC
127 Black Oak Hill Lane
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
309 local quotes requested

ASAP Homeworx 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.

"Bill was excellent! He was on time, personable, and very knowledgeable. Amazing customer service. 10/10 I wouldn’t choose anyone else for plumbing/drain work!"

Alysha s on January 2025

ASAP Homeworx 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.

"Bill was excellent! He was on time, personable, and very knowledgeable. Amazing customer service. 10/10 I wouldn’t choose anyone else for plumbing/drain work!"

Alysha s on January 2025


Avatar for Wilkes Plumbing & Sewer
Wilkes Plumbing & Sewer
4.67(
12
)
Approved Pro
Wilkes Plumbing & Sewer
4.67(
12
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
320 local quotes requested

20 years of experience with Residential and Commercial Plumbing

"It very well. He was polite. Kept me informed what he was doing. And he completed the job quickly the same day."

Stuart B on May 2025

20 years of experience with Residential and Commercial Plumbing

"It very well. He was polite. Kept me informed what he was doing. And he completed the job quickly the same day."

Stuart B on May 2025

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FAQs for tankless water heater installation projects in Knoxville, TN

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.

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