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Tankless water heater repair pros in Mahwah

Avatar for Mr. Rooter Plumbing
Mr. Rooter Plumbing
230 Bank Street Unit 3
4.00(
4
)
Approved Pro
Mr. Rooter Plumbing
230 Bank Street Unit 3
4.00(
4
)
Approved Pro
Customers say: Quick response
18 local quotes requested
57 years of experience

When homeowners and businesses in Bergen County need their plumbing fixed quickly, simply, and effectively, they turn to Mr. Rooter® Plumbing. Our experienced plumbers are all licensed, bonded, and insured, providing our customers with total peace of mind when they call. Their confidence is also founded on our reputation for durable repairs - everything we do at Mr. Rooter Plumbing is designed to have your plumbing system working well for a long time to come.

"Customer service - the worst. "

Peter C on March 2025

When homeowners and businesses in Bergen County need their plumbing fixed quickly, simply, and effectively, they turn to Mr. Rooter® Plumbing. Our experienced plumbers are all licensed, bonded, and insured, providing our customers with total peace of mind when they call. Their confidence is also founded on our reputation for durable repairs - everything we do at Mr. Rooter Plumbing is designed to have your plumbing system working well for a long time to come.

"Customer service - the worst. "

Peter C on March 2025


Avatar for Red Van Plumbing & Heating
Red Van Plumbing & Heating
PO Box 730
4.61(
59
)
Approved Pro
Red Van Plumbing & Heating
PO Box 730
4.61(
59
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
29 local quotes requested

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

"Beyond rude "

Becca D on February 2025

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

"Beyond rude "

Becca D on February 2025


Avatar for Garden State Water Heaters
Garden State Water Heaters
15 Shipman Place
4.64(
427
)
Approved Pro
Garden State Water Heaters
15 Shipman Place
4.64(
427
)
Approved Pro
Super Service Award
Customers say: Super punctual
168 local quotes requested
7 years of experience

Our experience is serving our customers with 100% satisfaction on every project we take on. We will give you the peace of mind you need and deserve. Garden State Water Heaters, happily services the community with integrity, professionalism, and competitive pricing. We are fully licensed and insured, and have built a reputation for quality work with each satisfied customer. Thank you for the opportunity to introduce you to our company.

"Good plumber, explained well, decent price."

Brian R on June 2025

Our experience is serving our customers with 100% satisfaction on every project we take on. We will give you the peace of mind you need and deserve. Garden State Water Heaters, happily services the community with integrity, professionalism, and competitive pricing. We are fully licensed and insured, and have built a reputation for quality work with each satisfied customer. Thank you for the opportunity to introduce you to our company.

"Good plumber, explained well, decent price."

Brian R on June 2025


Avatar for Drain Away Sewer Service Inc
Drain Away Sewer Service Inc
P.O. Box 3065
4.82(
38
)
Approved Pro
Drain Away Sewer Service Inc
P.O. Box 3065
4.82(
38
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
15 local quotes requested

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025

At Drain Away Sewer Service, Inc., we put our customers needs first! We offer a range of drain services and we know that our customer's are the backbone of our success. Response times are quick through our 24-hour emergency service and we pride ourselves on providing competitive, up-front costs. Whether you take advantage of our maintenance and service contracts for savings, or you use us for one-time emergency services, Drain Away Sewer Service, Inc. will deliver on professional, reliable and quality work. Drain Away Sewer Service, Inc. provides both residential and commercial drain cleaning services 24 hours a day, 7 days a week and 365 days per year. Offering over 10 years of experience in the drain cleaning business, our qualified staff is prepared to handle everything from a clogged toilet to main sewer services. We are centrally located to service both Westchester and Fairfield Counties.

"Richard from Drain Away service came out the next day and fixed the clogged drain. He was also very helpful with getting Servpro out to do clean up. Richard provided full and efficient services. Very pleasant and reasonably priced. I would definitely recommend Drain Away for any plumbing issues and would use them again if needed."

Paula A on February 2025


Avatar for Traditional Remodeling LLC
Traditional Remodeling LLC
20 Memorial Ct
4.66(
29
)
Approved Pro
Traditional Remodeling LLC
20 Memorial Ct
4.66(
29
)
Approved Pro
Customers say: Quality work
160 local quotes requested
32 years of experience

For over 30 years, owner George Ellenberg, has been building high quality structures. George merged a wealth of experience and skill into a company that has earned a markable reputation as one of the leading contracting companies. George Ellenberg, and his team of professional architects, licensed plumbers and licensed electricians, combine their strengths to create an unbeatable force in construction.

"George and his team did a fantastic job with remodeling our bathroom. Unbelievably smooth process from start to finish. Would and will hire again!!"

Jim R on April 2024

For over 30 years, owner George Ellenberg, has been building high quality structures. George merged a wealth of experience and skill into a company that has earned a markable reputation as one of the leading contracting companies. George Ellenberg, and his team of professional architects, licensed plumbers and licensed electricians, combine their strengths to create an unbeatable force in construction.

"George and his team did a fantastic job with remodeling our bathroom. Unbelievably smooth process from start to finish. Would and will hire again!!"

Jim R on April 2024


Avatar for AJT Complete Construction LLC
AJT Complete Construction LLC
25 1st St
4.81(
318
)
Approved Pro
AJT Complete Construction LLC
25 1st St
4.81(
318
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
167 local quotes requested

At AJT Complete Construction, we take great pride in our experience, expertise, quality, and customer service. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. We offer free estimates and evaluations

"Great communication. Fast, reliable and professional service. Would 110% hire again!"

Oliver S on April 2025

At AJT Complete Construction, we take great pride in our experience, expertise, quality, and customer service. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. We offer free estimates and evaluations

"Great communication. Fast, reliable and professional service. Would 110% hire again!"

Oliver S on April 2025


Preferred Plumbing of New Jersey LLC
5.00(
7
)
Approved Pro
Preferred Plumbing of New Jersey LLC
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
646 local quotes requested

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Accepts CC, Zelle, Cash and Checks.

"It went very well. He was very nice and professional. He was on time. I will definitely recommend him."

Raj P on April 2025

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Accepts CC, Zelle, Cash and Checks.

"It went very well. He was very nice and professional. He was on time. I will definitely recommend him."

Raj P on April 2025


Avatar for Home Quality Remodeling
Home Quality Remodeling
40 E Midland Ave.
5.00(
2
)
Approved Pro
Home Quality Remodeling
40 E Midland Ave.
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
296 local quotes requested

Home Quality Remodeling is a residential general contractor specializing in whole home remodels, including kitchen & bathroom remodels and home additions. We are licensed & insured in New Jersey. Satisfaction guaranteed, we always aim to exceed your expectations and never leave the job until your home vision is made a reality.

"Home Quality Remodeling took such great care of us with our project. We had a pleasant experience with Jacob, he is organized and professional. We will definitely return to them for future projects."

Kim F on November 2023

Home Quality Remodeling is a residential general contractor specializing in whole home remodels, including kitchen & bathroom remodels and home additions. We are licensed & insured in New Jersey. Satisfaction guaranteed, we always aim to exceed your expectations and never leave the job until your home vision is made a reality.

"Home Quality Remodeling took such great care of us with our project. We had a pleasant experience with Jacob, he is organized and professional. We will definitely return to them for future projects."

Kim F on November 2023


Avatar for Kremar Handyman Services LLC
Kremar Handyman Services LLC
.
5.00(
7
)
Approved Pro
Kremar Handyman Services LLC
.
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
584 local quotes requested

KRERMAR Handyman Services LLC is proud to offer diversity of services to ours customers like interior and exterior painting, masonry works, carpentry, general construction inside and outside the building and many more. We have a an 8 hour minimum on every project. We are proud to offer our customers premium quality work with an out standing service. We have more then 20 years experience and are proud in delivering the work in time and good quality. Choose KRERMAR Handyman services for any project you may have for small projects to complete home renovation. We promise best possible service with a fair competitive price. Contact Miri AGARAJ owner of the business at 2017027743 and schedule an appointment with free estimate. Keep your house in good condition with KRERMAR Handyman services LLC.

"There’s not enough that can be said about Miri and his team. He was the first contractor to call me and was out the following morning. We had a bad leak behind our wall and had to gut our entire first floor. He worked quickly to give me an estimate and got right to work. Not only did he do a fantastic job, and paid attention to every detail, but he worked unbelievably fast. He was on time every morning, and put in a full days work. He’s honest, and truly a master of his craft. If you’re looking for a good and honest contractor he’s your guy hands down. My wife and I decided to do more work in our home and we’re going to use him. I’ve also recommended him to other people I know to do work in their homes."

Barry P on July 2025

KRERMAR Handyman Services LLC is proud to offer diversity of services to ours customers like interior and exterior painting, masonry works, carpentry, general construction inside and outside the building and many more. We have a an 8 hour minimum on every project. We are proud to offer our customers premium quality work with an out standing service. We have more then 20 years experience and are proud in delivering the work in time and good quality. Choose KRERMAR Handyman services for any project you may have for small projects to complete home renovation. We promise best possible service with a fair competitive price. Contact Miri AGARAJ owner of the business at 2017027743 and schedule an appointment with free estimate. Keep your house in good condition with KRERMAR Handyman services LLC.

"There’s not enough that can be said about Miri and his team. He was the first contractor to call me and was out the following morning. We had a bad leak behind our wall and had to gut our entire first floor. He worked quickly to give me an estimate and got right to work. Not only did he do a fantastic job, and paid attention to every detail, but he worked unbelievably fast. He was on time every morning, and put in a full days work. He’s honest, and truly a master of his craft. If you’re looking for a good and honest contractor he’s your guy hands down. My wife and I decided to do more work in our home and we’re going to use him. I’ve also recommended him to other people I know to do work in their homes."

Barry P on July 2025


Avatar for First Class Plumbing & Heating, LLC.
First Class Plumbing & Heating, LLC.
**
4.69(
13
)
Approved Pro
First Class Plumbing & Heating, LLC.
**
4.69(
13
)
Approved Pro
Customers say: Quality work
478 local quotes requested
28 years of experience

First Class Plumbing & Heating is a family owned and operated company that has been in business for over 15 years. We are certified Master Plumbers in NJ, and are completely insured and bonded. Our primary goal is high customer satisfaction, and we take pride in providing you the best service at all times. We currently have special offers for the Spring/Summer Season - Contact us today for more information.

"Highly recommended. Very polite and professional. I had so many little projects that went unfixed for years because other plumbers were lazy or incompetent. First Class Plumbing were able to fix things that other plumbers didn’t. In addition, they were extremely polite with my difficult mother. Other plumbers would get offended and never come back. First Class will be my go to plumbers from now on."

Amani A on June 2023

First Class Plumbing & Heating is a family owned and operated company that has been in business for over 15 years. We are certified Master Plumbers in NJ, and are completely insured and bonded. Our primary goal is high customer satisfaction, and we take pride in providing you the best service at all times. We currently have special offers for the Spring/Summer Season - Contact us today for more information.

"Highly recommended. Very polite and professional. I had so many little projects that went unfixed for years because other plumbers were lazy or incompetent. First Class Plumbing were able to fix things that other plumbers didn’t. In addition, they were extremely polite with my difficult mother. Other plumbers would get offended and never come back. First Class will be my go to plumbers from now on."

Amani A on June 2023

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FAQs for tankless water heater installation projects in Mahwah, NJ

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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