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 Marino

Avatar for West Coast Plumbing
West Coast Plumbing
723 East Valencia Ave
5.00(
3
)
Approved Pro
West Coast Plumbing
723 East Valencia Ave
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

At West Coast Plumbing, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"We used West coast plumbing to help with a leak we had in the house. They did an exceptional job. They were very prompt and informative about the issue and the work that needed to be performed. We will be calling them for any future needs."

Lucy C on September 2023

At West Coast Plumbing, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"We used West coast plumbing to help with a leak we had in the house. They did an exceptional job. They were very prompt and informative about the issue and the work that needed to be performed. We will be calling them for any future needs."

Lucy C on September 2023


Avatar for Top Notch Plumbing, Inc.
Top Notch Plumbing, Inc.
4903 North Vecino Drive
4.89(
22
)
Approved Pro
Top Notch Plumbing, Inc.
4903 North Vecino Drive
4.89(
22
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
9 years of experience

At Top Notch Plumbing Inc. we are your premiere source for Plumbing Since 2016 our company has offered the finest in craftsmanship and quality. For the best of the best call today for your next project.

"The work performed was excellent, but I felt they were expensive"

Kathy W on May 2024

At Top Notch Plumbing Inc. we are your premiere source for Plumbing Since 2016 our company has offered the finest in craftsmanship and quality. For the best of the best call today for your next project.

"The work performed was excellent, but I felt they were expensive"

Kathy W on May 2024


Avatar for California Drains Incorporated
California Drains Incorporated
1424 7th Street
5.00(
6
)
Approved Pro
California Drains Incorporated
1424 7th Street
5.00(
6
)
Approved Pro
Customers say: Quick response
115 local quotes requested
11 years of experience

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"This company is the best. They were upfront on the cost of the repairs and did a fantastic job. They will aways be our first choice for any future plumbing projects. Thank you, California Drains!"

Nikolai W on February 2025

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"This company is the best. They were upfront on the cost of the repairs and did a fantastic job. They will aways be our first choice for any future plumbing projects. Thank you, California Drains!"

Nikolai W on February 2025


Avatar for INCREDIBLE PLUMBER
INCREDIBLE PLUMBER
17922 Collins St
New on HomeAdvisorNew on Angi
Approved Pro
INCREDIBLE PLUMBER
17922 Collins St
New on AngiNew on HomeAdvisor
Approved Pro
3 years of experience
Free onsite estimate

Incredible Plumber 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.

Incredible Plumber 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.


Avatar for Leon Plumbing
Leon Plumbing
2409 Janet Lee Drive
4.92(
60
)
Approved Pro
Leon Plumbing
2409 Janet Lee Drive
4.92(
60
)
Approved Pro
Customers say: True professional
19 local quotes requested
42 years of experience

We are a locally family owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of Heating/ Air Conditioning services and more. Providing customization to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction. With 20 years of experience in the field we offer excellence every time.

"Great service, reasonable prices, and they keep their word on time and estimates. My machine is running just like new. "

Nick T on June 2025

We are a locally family owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of Heating/ Air Conditioning services and more. Providing customization to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction. With 20 years of experience in the field we offer excellence every time.

"Great service, reasonable prices, and they keep their word on time and estimates. My machine is running just like new. "

Nick T on June 2025


Avatar for Legacy Pro Plumbing
Legacy Pro Plumbing
3722 Almansa Way
5.00(
8
)
Approved Pro
Legacy Pro Plumbing
3722 Almansa Way
5.00(
8
)
Approved Pro
Customers say: Quick response
102 local quotes requested
20 years of experience

We’re dedicated to providing our clients with the very best in service, installation, and repair to meet your plumbing needs. We specialize in mechanical piping and a variety of residential and commercial services. We take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Excellent work and very professional! "

Monica D on May 2025

We’re dedicated to providing our clients with the very best in service, installation, and repair to meet your plumbing needs. We specialize in mechanical piping and a variety of residential and commercial services. We take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Excellent work and very professional! "

Monica D on May 2025


Avatar for Premiere 1 Plumbing, Inc.
Premiere 1 Plumbing, Inc.
5.00(
3
)
Approved Pro
Premiere 1 Plumbing, Inc.
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
145 local quotes requested

Our mission is to be a plumbing contractor 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!

"Premier 1 Plumbing was professional from start to finish! They replaced the water line under my crawlspace with great attention to detail and kept me informed every step of the way. The team was respectful, knowledgeable, and thorough in their work. I really appreciated their clear communication and professionalism. I would definitely hire them again and highly recommend them to anyone in need of plumbing services."

alexis R on February 2025

Our mission is to be a plumbing contractor 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!

"Premier 1 Plumbing was professional from start to finish! They replaced the water line under my crawlspace with great attention to detail and kept me informed every step of the way. The team was respectful, knowledgeable, and thorough in their work. I really appreciated their clear communication and professionalism. I would definitely hire them again and highly recommend them to anyone in need of plumbing services."

alexis R on February 2025


Avatar for Alpine Plumbing and Rooter
Alpine Plumbing and Rooter
462 Borrego Ct
4.67(
24
)
Approved Pro
Alpine Plumbing and Rooter
462 Borrego Ct
4.67(
24
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
1108 local quotes requested

Need fast, reliable plumbing help? Alpine Plumbing & Rooter serves residents and business owners throughout San Dimas, La Verne, and surrounding areas with expert services. Call the plumbers you can trust when you’re faced with a problem you need fixed right away. We have the fastest response time in the area - we’ll be at your door within 90 minutes! We put our customers first - one call can solve your home plumbing issues. We are a local, family owned and operated company based in San Dimas, specializing in drain cleaning, sewer replacement, and sewer repair services. Call the plumbers you can trust to schedule an appointment today.

"Mike and Bert took care of me from beginning to end. Whole house piped. Would highly recommend to anyone"

Jonathan H on April 2025

Need fast, reliable plumbing help? Alpine Plumbing & Rooter serves residents and business owners throughout San Dimas, La Verne, and surrounding areas with expert services. Call the plumbers you can trust when you’re faced with a problem you need fixed right away. We have the fastest response time in the area - we’ll be at your door within 90 minutes! We put our customers first - one call can solve your home plumbing issues. We are a local, family owned and operated company based in San Dimas, specializing in drain cleaning, sewer replacement, and sewer repair services. Call the plumbers you can trust to schedule an appointment today.

"Mike and Bert took care of me from beginning to end. Whole house piped. Would highly recommend to anyone"

Jonathan H on April 2025


Avatar for Proview Plumbing & Rooter Inc.
Proview Plumbing & Rooter Inc.
701 University Avenue
5.00(
6
)
Approved Pro
Proview Plumbing & Rooter Inc.
701 University Avenue
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
202 local quotes requested

Following my grandfathers foot steps, I started Proview Plumbing & Rooter as a trustworthy, Family owned business. We are licensed, bonded and insured company ready to provide 24/7 service!

"I had a fantastic experience with Proview Plumbing & Rooter! Alex and Arthur were both incredibly professional from start to finish. They arrived right on time, communicated each step clearly, and offered solid options before beginning the job. In my case, they replaced a leaking hot water heater and also tackled a high water pressure issue by installing a new regulator. They worked quickly and efficiently, ensuring everything was up to code, and their workmanship was first-rate. Best of all, they made the entire process easy and worry-free. Highly recommend!"

Keenan J on January 2025

Following my grandfathers foot steps, I started Proview Plumbing & Rooter as a trustworthy, Family owned business. We are licensed, bonded and insured company ready to provide 24/7 service!

"I had a fantastic experience with Proview Plumbing & Rooter! Alex and Arthur were both incredibly professional from start to finish. They arrived right on time, communicated each step clearly, and offered solid options before beginning the job. In my case, they replaced a leaking hot water heater and also tackled a high water pressure issue by installing a new regulator. They worked quickly and efficiently, ensuring everything was up to code, and their workmanship was first-rate. Best of all, they made the entire process easy and worry-free. Highly recommend!"

Keenan J on January 2025


Avatar for Hard Hat Rooter & Plumbing
Hard Hat Rooter & Plumbing
416 East Cypress Avenue
4.81(
449
)
Approved Pro
Hard Hat Rooter & Plumbing
416 East Cypress Avenue
4.81(
449
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
698 local quotes requested

We are committed in providing the best service at a competitive price. We have been serving the greater Los Angeles communities for over 25 years. Our employees are well trained and are ready to satisfy all your plumbing needs. We have 3 trucks out on the field to provide fast service. We offer estimates over the phone and in person. We are Green Plumbing accredited.

"Great service and very easy to communicate with. The technician was professional and on time. Excellent work at a very reasonable price."

Ariga B on March 2025

We are committed in providing the best service at a competitive price. We have been serving the greater Los Angeles communities for over 25 years. Our employees are well trained and are ready to satisfy all your plumbing needs. We have 3 trucks out on the field to provide fast service. We offer estimates over the phone and in person. We are Green Plumbing accredited.

"Great service and very easy to communicate with. The technician was professional and on time. Excellent work at a very reasonable price."

Ariga B on March 2025

...
Showing 1-10 of 921

FAQs for tankless water heater installation projects in San Marino, CA

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.