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 San Antonio

Avatar for Plumbing Diagnostic & Repair
Plumbing Diagnostic & Repair
PO BOX 116
New on HomeAdvisorNew on Angi
Approved Pro
Plumbing Diagnostic & Repair
PO BOX 116
New on AngiNew on HomeAdvisor
Approved Pro
6 years of experience
Free onsite estimate

Plumbing Diagnostic & Repair 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. Please give us a call today!

Plumbing Diagnostic & Repair 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. Please give us a call today!


Avatar for Juan's Plumbing Services, LLC
Juan's Plumbing Services, LLC
10730 Potranco Rd, Suite 122 Box 203
5.00(
5
)
Approved Pro
Juan's Plumbing Services, LLC
10730 Potranco Rd, Suite 122 Box 203
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

Juan's Plumbing Services is a locally owned & operated business located in San Antonio. With over 14 years of experience as a Master Plumber, you can trust us to complete your plumbing project to perfection every single time. We pride ourselves on delivering exceptional customer service and turning every customer into a life-time customer. Call today to set an appointment! You'll be glad you did.

"Will definitely recommend Juanâ s plumbing. Had my repair done the same day."

Maria J on May 2023

Juan's Plumbing Services is a locally owned & operated business located in San Antonio. With over 14 years of experience as a Master Plumber, you can trust us to complete your plumbing project to perfection every single time. We pride ourselves on delivering exceptional customer service and turning every customer into a life-time customer. Call today to set an appointment! You'll be glad you did.

"Will definitely recommend Juanâ s plumbing. Had my repair done the same day."

Maria J on May 2023


Owners have combined 10+ years in service, Plumbers have over 50

"They were honest and did exactly what they were supposed to do"

Lance S on April 2025


Avatar for Reliant Plumbing
Reliant Plumbing
1119 Fresno St
4.29(
14
)
Approved Pro
Reliant Plumbing
1119 Fresno St
4.29(
14
)
Approved Pro
Customers say: Quick response
103 local quotes requested
13 years of experience

Reliant Plumbing is your local Central Texas plumbing company. We live and work in the greater San Antonio areas, where we offer all plumbing services. We pride ourselves on understanding the unique plumbing needs that come with living in this area. We are committed to providing only the highest quality plumbing repairs, and vow to provide exceptional customer service. We believe in keeping this promise to each and every customer and that's why we guarantee our work.

"Fast job, discussed options openly, performed work excellently!"

Ken B on March 2025

Reliant Plumbing is your local Central Texas plumbing company. We live and work in the greater San Antonio areas, where we offer all plumbing services. We pride ourselves on understanding the unique plumbing needs that come with living in this area. We are committed to providing only the highest quality plumbing repairs, and vow to provide exceptional customer service. We believe in keeping this promise to each and every customer and that's why we guarantee our work.

"Fast job, discussed options openly, performed work excellently!"

Ken B on March 2025


Avatar for Champion A/C, Inc.
Champion A/C, Inc.
2709 Bulverde Rd
4.62(
85
)
Approved Pro
Champion A/C, Inc.
2709 Bulverde Rd
4.62(
85
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
48 local quotes requested

Undefeated at home since 2007, Champion Cooling, Heating, Plumbing, & Electrical does whatever it takes to clinch total home comfort & 100% customer satisfaction throughout South Central Texas. With honesty & determination, Champion prioritizes the satisfaction of every customer through transparent pricing, educated options, & peace of mind provided by some of the most skilled & community-committed technicians in Texas.

"Very professional and good at communicating. The technician did a great and quick job with the water heater. "

Steve R on March 2025

Undefeated at home since 2007, Champion Cooling, Heating, Plumbing, & Electrical does whatever it takes to clinch total home comfort & 100% customer satisfaction throughout South Central Texas. With honesty & determination, Champion prioritizes the satisfaction of every customer through transparent pricing, educated options, & peace of mind provided by some of the most skilled & community-committed technicians in Texas.

"Very professional and good at communicating. The technician did a great and quick job with the water heater. "

Steve R on March 2025


Avatar for 1-800-Plumber + Air of East San Antonio
1-800-Plumber + Air of East San Antonio
8845 FM 1976 Suite 107
4.75(
4
)
Approved Pro
1-800-Plumber + Air of East San Antonio
8845 FM 1976 Suite 107
4.75(
4
)
Approved Pro
Customers say: Quick response
128 local quotes requested
1 years of experience

1-800-Plumber + Air is focused on being the BEST! It's not about being better than everyone else, instead our focus is on providing you with the fast, dependable plumbing and emergency services when you need it most. Our goal is to give you the BEST experience you have ever received from a service based business.

"Excellent Service. I highly recommend. They explain and show ed me the service they could provide for my house."

Olga S on May 2025

1-800-Plumber + Air is focused on being the BEST! It's not about being better than everyone else, instead our focus is on providing you with the fast, dependable plumbing and emergency services when you need it most. Our goal is to give you the BEST experience you have ever received from a service based business.

"Excellent Service. I highly recommend. They explain and show ed me the service they could provide for my house."

Olga S on May 2025


Avatar for Beyer Plumbing
Beyer Plumbing
17197 Beyer John Dr
4.75(
12
)
Approved Pro
Beyer Plumbing
17197 Beyer John Dr
4.75(
12
)
Approved Pro
Super Service Award
Customers say: True professional
168 local quotes requested
27 years of experience

Beyer Plumbing is one of San Antonio's largest residential and commercial plumbing companies. As a family-owned business, we view our clients as an extension of our family and have been providing trusted results to residential and commercial customers in the greater San Antonio area since 1990. With over 40 years of collective experience, our technicians are trained, certified, and ready to accommodate your plumbing needs. That means our clients can expect fair treatment, committed service, straight talk, and a focus on quality. We keep up with the latest advances and products so that we can serve you in a reliable manner. Whether it's a hot water problem or a request for a fixture installation, we'll respond promptly. Making sure you're confident in the service we're providing is a priority for us. We believe the most important factor in business success is building long-term relationships with our customers.

"Efficient, on time, neat but very expensive. I received 3 estimates and 2 were prohibitive."

Rosalind H on October 2024

Beyer Plumbing is one of San Antonio's largest residential and commercial plumbing companies. As a family-owned business, we view our clients as an extension of our family and have been providing trusted results to residential and commercial customers in the greater San Antonio area since 1990. With over 40 years of collective experience, our technicians are trained, certified, and ready to accommodate your plumbing needs. That means our clients can expect fair treatment, committed service, straight talk, and a focus on quality. We keep up with the latest advances and products so that we can serve you in a reliable manner. Whether it's a hot water problem or a request for a fixture installation, we'll respond promptly. Making sure you're confident in the service we're providing is a priority for us. We believe the most important factor in business success is building long-term relationships with our customers.

"Efficient, on time, neat but very expensive. I received 3 estimates and 2 were prohibitive."

Rosalind H on October 2024


Avatar for CoverAll Plumbing Solutions
CoverAll Plumbing Solutions
1005 Perez St
5.00(
3
)
Approved Pro
CoverAll Plumbing Solutions
1005 Perez St
5.00(
3
)
Approved Pro
Customers say: Quick response
2 years of experience
Free onsite estimate

Here at CoverAll Plumbing Solutions, we are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of quality home improvement services. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guaranteeing your satisfaction! We offer 24-hour emergency services.

"My water heater went out, called Coverall plumbing within same day I had a new tank ! Installed, tested, and ready to use! They were very proficient, on time and kept me up to par with all and any updates."

Chris C on January 2024

Here at CoverAll Plumbing Solutions, we are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of quality home improvement services. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guaranteeing your satisfaction! We offer 24-hour emergency services.

"My water heater went out, called Coverall plumbing within same day I had a new tank ! Installed, tested, and ready to use! They were very proficient, on time and kept me up to par with all and any updates."

Chris C on January 2024


Avatar for 4m Plumbing Services
4m Plumbing Services
5707 Horizon Dr.
5.00(
11
)
Approved Pro
4m Plumbing Services
5707 Horizon Dr.
5.00(
11
)
Approved Pro
4 years of experience
Free onsite estimate

San Antonio homeowners are smart and we know you’re tired of being overcharged by out-of-town companies that treat you like just another number. At 4M Plumbing, we were born and raised right here in San Antonio. We don’t answer to shareholders, we answer to our neighbors. That’s why we built a plumbing company around what matters to real people here: ✔️ Fair prices that don’t feel like hospital bills ✔️ Quick response times ✔️ Clear communication — start to finish ✔️ Clean, respectful, professional service We specialize in water heaters, sewer line replacements, leak repairs, and more, plus we back our work with real warranties: 🔧 10 years on water heaters 🔧 5 years on sewer line replacements No corporate tricks. Just good plumbing.

"Yes he did! Very knowledgeable and great customer service ?"

devin o on May 2025

San Antonio homeowners are smart and we know you’re tired of being overcharged by out-of-town companies that treat you like just another number. At 4M Plumbing, we were born and raised right here in San Antonio. We don’t answer to shareholders, we answer to our neighbors. That’s why we built a plumbing company around what matters to real people here: ✔️ Fair prices that don’t feel like hospital bills ✔️ Quick response times ✔️ Clear communication — start to finish ✔️ Clean, respectful, professional service We specialize in water heaters, sewer line replacements, leak repairs, and more, plus we back our work with real warranties: 🔧 10 years on water heaters 🔧 5 years on sewer line replacements No corporate tricks. Just good plumbing.

"Yes he did! Very knowledgeable and great customer service ?"

devin o on May 2025


Avatar for Jilly Plumbing
Jilly Plumbing
28991 Interstate 10 West Suite 107
4.84(
615
)
Approved Pro
Jilly Plumbing
28991 Interstate 10 West Suite 107
4.84(
615
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
4 years of experience

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!

"While I did not proceed with the overall project, Jillie Plumbing was outstanding in providing advice and cost estimates were inline and even better than competitors. I was so impressed that I have my go to plumber! Recommend you seek Jillie Plumbing with confidence he’ll do only the work needed at a fair price."

Patrick E on December 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!

"While I did not proceed with the overall project, Jillie Plumbing was outstanding in providing advice and cost estimates were inline and even better than competitors. I was so impressed that I have my go to plumber! Recommend you seek Jillie Plumbing with confidence he’ll do only the work needed at a fair price."

Patrick E on December 2024

...
Showing 1-10 of 952

FAQs for tankless water heater installation projects in San Antonio, TX

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.