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Tankless water heater repair pros in Universal City

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


Avatar for 1-800-Plumber + Air of East San Antonio
1-800-Plumber + Air of East San Antonio
8845 FM 1976 Suite 107
4.80(
5
)
Approved Pro
1-800-Plumber + Air of East San Antonio
8845 FM 1976 Suite 107
4.80(
5
)
Approved Pro
Customers say: Quick response
131 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.

"Polite, fast friendly service. They were really nice to work with. Replaced outdoor faucet and washing machine faucets, and did a great job. Quick even with our older quirky house. I would recommend this company for friendly, professional service with a very fair price."

Suzanne L on July 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.

"Polite, fast friendly service. They were really nice to work with. Replaced outdoor faucet and washing machine faucets, and did a great job. Quick even with our older quirky house. I would recommend this company for friendly, professional service with a very fair price."

Suzanne L on July 2025


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


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

"Wonderful. "

Samantha B on June 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
66 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 Caliente Water, LLC
Caliente Water, LLC
141 Industrial Dr, Suite 204
4.88(
347
)
Approved Pro
Caliente Water, LLC
141 Industrial Dr, Suite 204
4.88(
347
)
Approved Pro
Customers say: Quick response
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers
30 local quotes requested

Our company welcomes you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality craftsmanship will accurately reflect your tasks and lifestyle. We are known for our prompt service and superior attention to detail. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You'll be pleased you did. Thank you

"Prompt and honest"

Stephen B on December 2024

Our company welcomes you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality craftsmanship will accurately reflect your tasks and lifestyle. We are known for our prompt service and superior attention to detail. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You'll be pleased you did. Thank you

"Prompt and honest"

Stephen B on December 2024


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
123 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 Constructovate
Constructovate
-
4.74(
96
)
Approved Pro
Constructovate
-
4.74(
96
)
Approved Pro
Customers say: Quality work
130 local quotes requested
20 years of experience

Constructovate is a residential/commercial construction and remodeling company servicing from New Braunfels, Tx and surrounding areas. We want to be your "go-to" contractor for you home or business. Some of our services include remodeling, masonry, painting, decks, fences. Our organization has extensive hands on experience in all areas of the construction and remodeling industry ranging from small carpentry projects to complete construction of commercial buildings. With our experience, you can be assured that we can complete projects of any size in a timely manner. Having this experience makes our projects run smoother and in a timely manner. We believe that there is ALWAYS a solution to every problem that may arise during the construction process and we always look for the positive in every situation. Call us to schedule an estimate today! Visit our website @ Constructovate.com (previously DBA: Reliant Renovations)

"Great communication, beautiful results done in a timely manner. Detailed estimate of everything at a reasonable price. I would recommend Constructovate for any project!"

Melinda B on January 2024

Constructovate is a residential/commercial construction and remodeling company servicing from New Braunfels, Tx and surrounding areas. We want to be your "go-to" contractor for you home or business. Some of our services include remodeling, masonry, painting, decks, fences. Our organization has extensive hands on experience in all areas of the construction and remodeling industry ranging from small carpentry projects to complete construction of commercial buildings. With our experience, you can be assured that we can complete projects of any size in a timely manner. Having this experience makes our projects run smoother and in a timely manner. We believe that there is ALWAYS a solution to every problem that may arise during the construction process and we always look for the positive in every situation. Call us to schedule an estimate today! Visit our website @ Constructovate.com (previously DBA: Reliant Renovations)

"Great communication, beautiful results done in a timely manner. Detailed estimate of everything at a reasonable price. I would recommend Constructovate for any project!"

Melinda B on January 2024


Avatar for Will's Plumbing & Testing Service
Will's Plumbing & Testing Service
318 E Nakoma
4.72(
1,753
)
Approved Pro
Will's Plumbing & Testing Service
318 E Nakoma
4.72(
1,753
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
1225 local quotes requested

We are a "Texas Family" owned and operated business. We have been in business over 25 years and we've built this company 1 customer at a time. We are "Dedicated to Quality" and we show it in everything we do. We send only State of Texas licensed Plumbers to your home, to ensure you get a well trained professional to service your home. We are available 24 hours a day, 7 days a week AND you'll never get an "Answering Service", you'll get a member of our staff who cares about your needs. We take great pride in the Company and our fellow employees, who are the best in the Plumbing industry. Whether they work in the field or the office, the people of Will's Plumbing & Testing Service not only make things happen, but make sure you, the customer, are happy. We are the #1 Rinnai Tankless Water Heater installers and warranty service providers. We also service & flush the systems we and others install. We also Repair, Service/Maintenance Rinnai, Navien, A.O. Smith, and many other tankless and storage type water heaters. Our Plumbers are dedicated to providing you the best in Service and Customer Satisfaction. Please call us at (210) 494-0991 in San Antonio and the surrounding areas, or find us on our website @ www.willsplumbing.com. We are an Award Winning Service Company on Angie's List since 2010 and we have been in business for over 17 years!! We have won Angie's List's highest awards in multiple categories for the last 6 years. We service customers in San Antonio and ALL surrounding counties. Additional emails: will@willsplumbing.com & info@willsplumbing.com.

"Will's Plumbing & Testing Service was extremely friendly and professional, including the owner, office and the plumbers. They responded promptly, quickly diagnosed the problem, and completed the job thoroughly. I’m very satisfied with their service and would highly recommend them!"

Joyce T on May 2025

We are a "Texas Family" owned and operated business. We have been in business over 25 years and we've built this company 1 customer at a time. We are "Dedicated to Quality" and we show it in everything we do. We send only State of Texas licensed Plumbers to your home, to ensure you get a well trained professional to service your home. We are available 24 hours a day, 7 days a week AND you'll never get an "Answering Service", you'll get a member of our staff who cares about your needs. We take great pride in the Company and our fellow employees, who are the best in the Plumbing industry. Whether they work in the field or the office, the people of Will's Plumbing & Testing Service not only make things happen, but make sure you, the customer, are happy. We are the #1 Rinnai Tankless Water Heater installers and warranty service providers. We also service & flush the systems we and others install. We also Repair, Service/Maintenance Rinnai, Navien, A.O. Smith, and many other tankless and storage type water heaters. Our Plumbers are dedicated to providing you the best in Service and Customer Satisfaction. Please call us at (210) 494-0991 in San Antonio and the surrounding areas, or find us on our website @ www.willsplumbing.com. We are an Award Winning Service Company on Angie's List since 2010 and we have been in business for over 17 years!! We have won Angie's List's highest awards in multiple categories for the last 6 years. We service customers in San Antonio and ALL surrounding counties. Additional emails: will@willsplumbing.com & info@willsplumbing.com.

"Will's Plumbing & Testing Service was extremely friendly and professional, including the owner, office and the plumbers. They responded promptly, quickly diagnosed the problem, and completed the job thoroughly. I’m very satisfied with their service and would highly recommend them!"

Joyce T on May 2025

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FAQs for tankless water heater installation projects in Universal City, 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.

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