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Tankless water heater repair pros in South Pasadena

Avatar for ESB Plumbing
ESB Plumbing
1304 West 51st Street
5.00(
2
)
Approved Pro
ESB Plumbing
1304 West 51st Street
5.00(
2
)
Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

ESB 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.

"Very honest and professional. Mindful of safety regulations. Price is very reasonable. My whole family uses ESB and we recommend them to others. First time the owner came out he didn't even charge me. He tried to find the least expensive solution. This is so uncommon in today's world. I'm grateful and very satisfied."

Rachel A on May 2021

ESB 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.

"Very honest and professional. Mindful of safety regulations. Price is very reasonable. My whole family uses ESB and we recommend them to others. First time the owner came out he didn't even charge me. He tried to find the least expensive solution. This is so uncommon in today's world. I'm grateful and very satisfied."

Rachel A on May 2021


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


Water Heater Pros
7101 Ramsgate Ave
5.00(
2
)
Approved Pro
Water Heater Pros
7101 Ramsgate Ave
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
9 years of experience

Water Heater Pros prides itself on being the number one water heater company in the area. We built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being screened and approved as well as a licensed and insured professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started! Let us do the dirty work!

"They do good work, honest and reliable."

sylvia c on October 2018

Water Heater Pros prides itself on being the number one water heater company in the area. We built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being screened and approved as well as a licensed and insured professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started! Let us do the dirty work!

"They do good work, honest and reliable."

sylvia c on October 2018


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 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 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
20 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 R R Electric Heating & Air
R R Electric Heating & Air
331 Science Drive,
4.90(
10
)
Approved Pro
R R Electric Heating & Air
331 Science Drive,
4.90(
10
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
31 years of experience

R R Electric Heating & Air proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"Estimating for the project was carefully done and checked so there were no surprises."

Curtis H on October 2023

R R Electric Heating & Air proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"Estimating for the project was carefully done and checked so there were no surprises."

Curtis H on October 2023


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
107 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 Monroy's Father & Son Restoration
Monroy's Father & Son Restoration
916 East 41st Place
5.00(
3
)
Approved Pro
Monroy's Father & Son Restoration
916 East 41st Place
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
724 local quotes requested

Monroy's Father & Son Restoration is a Local Company with Over 15 Years of Experience in the Restoration Industry When disaster strikes your Los Angeles property, you need a team that you can trust to handle the situation with care and efficiency. Monroy’s Father & Son Restoration is a top-rated restoration company that has been serving our community for years. We are not a national chain or franchise but a local business that truly cares about our customers and their properties. Our name has become synonymous with excellent customer service, attention to detail, and top-quality workmanship. You can expect nothing less from our dedicated and experienced team. Unlike other restoration companies, we prioritize service over profits. We are passionate about helping you recover from any type of property damage, whether it be from water, fire, mold, or other man-made and natural disasters.

"I had the headache of trying to finding a reputable company to fix the mold problem at my father’s house. I sifted through 5 other companies and for one reason or another they didn’t work out. Until I found Monroy's Father and Son Restoration. From the moment I contacted them, Daniel was a dream to work with. I knew I was in good hands. Dealing with mold is stressful and overwhelming, but everyone I spoke or dealt with immediately put my mind at ease with their professional and compassionate approach. Daniel was responsive and answered every question I had. He made this process so easy! They weren't just trying to sell me a service; they genuinely cared about helping me and me get the house back to a safe environment. The team arrived promptly for the work and sent status updates at the end of each day. During the remediation their attention to detail was impeccable. They treated our home with the utmost respect. They worked efficiently and diligently, and I was impressed by their commitment to doing the job right the first time. Thanks to Monroy’s Father & Son Restoration our home is now mold-free, and we can breathe easy again. If you're looking for a reliable, trustworthy, and genuinely caring mold remediation company, look no further. You won't be disappointed! I highly recommend them to anyone dealing with a mold issue. Support small business!"

Rebecca R on May 2025

Monroy's Father & Son Restoration is a Local Company with Over 15 Years of Experience in the Restoration Industry When disaster strikes your Los Angeles property, you need a team that you can trust to handle the situation with care and efficiency. Monroy’s Father & Son Restoration is a top-rated restoration company that has been serving our community for years. We are not a national chain or franchise but a local business that truly cares about our customers and their properties. Our name has become synonymous with excellent customer service, attention to detail, and top-quality workmanship. You can expect nothing less from our dedicated and experienced team. Unlike other restoration companies, we prioritize service over profits. We are passionate about helping you recover from any type of property damage, whether it be from water, fire, mold, or other man-made and natural disasters.

"I had the headache of trying to finding a reputable company to fix the mold problem at my father’s house. I sifted through 5 other companies and for one reason or another they didn’t work out. Until I found Monroy's Father and Son Restoration. From the moment I contacted them, Daniel was a dream to work with. I knew I was in good hands. Dealing with mold is stressful and overwhelming, but everyone I spoke or dealt with immediately put my mind at ease with their professional and compassionate approach. Daniel was responsive and answered every question I had. He made this process so easy! They weren't just trying to sell me a service; they genuinely cared about helping me and me get the house back to a safe environment. The team arrived promptly for the work and sent status updates at the end of each day. During the remediation their attention to detail was impeccable. They treated our home with the utmost respect. They worked efficiently and diligently, and I was impressed by their commitment to doing the job right the first time. Thanks to Monroy’s Father & Son Restoration our home is now mold-free, and we can breathe easy again. If you're looking for a reliable, trustworthy, and genuinely caring mold remediation company, look no further. You won't be disappointed! I highly recommend them to anyone dealing with a mold issue. Support small business!"

Rebecca R on May 2025


Avatar for Haven Electric & Plumbing
Haven Electric & Plumbing
11121 First Ave
5.00(
11
)
Approved Pro
Haven Electric & Plumbing
11121 First Ave
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1428 local quotes requested

Haven Electric and Plumbing is dedicated to delivering exceptional electrical and plumbing services tailored to meet the unique needs of each client. Our mission is to ensure reliability and quality through customized solutions, supported by a team of highly skilled and experienced technicians who are always prepared to provide outstanding service. We are committed to your satisfaction and will not consider the job complete until it meets our high standards. Our pride lies in the quality of our work and our commitment to excellent customer service. Explore the range of services we offer below, and feel free to call or click to schedule your free estimate today!

"The team did a great job! They were prompt, polite, efficient, kept me informed and left the area clean."

Robert M on August 2024

Haven Electric and Plumbing is dedicated to delivering exceptional electrical and plumbing services tailored to meet the unique needs of each client. Our mission is to ensure reliability and quality through customized solutions, supported by a team of highly skilled and experienced technicians who are always prepared to provide outstanding service. We are committed to your satisfaction and will not consider the job complete until it meets our high standards. Our pride lies in the quality of our work and our commitment to excellent customer service. Explore the range of services we offer below, and feel free to call or click to schedule your free estimate today!

"The team did a great job! They were prompt, polite, efficient, kept me informed and left the area clean."

Robert M on August 2024

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FAQs for tankless water heater installation projects in South Pasadena, 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.

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