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Get matched with top water heater pros in Londonderry, NH

There are 8 highly-rated local water heater pros.

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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon15
    Verified water heater services reviews

Find Water heater pros in Londonderry

Merrimack Valley Plumbing & Home Services

72 S. Kimball St.
New on AngiNew on Angi
Approved Pro

Merrimack Valley Plumbing & Home Services

72 S. Kimball St.
New on AngiNew on Angi
Approved Pro
154 local quotes requested
8 years of experience

Merrimack Valley Plumbing, LLC is a locally-owned and operated company committed to providing fast, affordable, and high-quality Plumbing. We offer HVAC repair, installation, and replacement services. We specialize in heating controls and simplifying complicated plumbing and HVAC systems to make them user-friendly. We strive to find solutions that fit everyone’s comfort needs, from construction projects to air conditioner replacement.

Merrimack Valley Plumbing, LLC is a locally-owned and operated company committed to providing fast, affordable, and high-quality Plumbing. We offer HVAC repair, installation, and replacement services. We specialize in heating controls and simplifying complicated plumbing and HVAC systems to make them user-friendly. We strive to find solutions that fit everyone’s comfort needs, from construction projects to air conditioner replacement.


Avatar for Sila Heating, Cooling, Plumbing and Electrical

Sila Heating, Cooling, Plumbing and Electrical

12 Manison St
4.54(
5,209
)
Approved Pro

Sila Heating, Cooling, Plumbing and Electrical

12 Manison St
4.54(
5,209
)
Approved Pro
Customers say: Super punctual
641 local quotes requested
36 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Charged $2,000 (that's right, $2,000!) to install a new sprayer faucet and soap dispenser in Boston. $1,500 went to labor, which took less than 2 hours. I'm sorry, but $750/hr is outrageous. I did pay it because I wanted to expedite solving the problem for the tenants, but I now regret as their dishwasher is not working and I suspect the plumber failed to reconnect everything probably."

Joel R on August 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Charged $2,000 (that's right, $2,000!) to install a new sprayer faucet and soap dispenser in Boston. $1,500 went to labor, which took less than 2 hours. I'm sorry, but $750/hr is outrageous. I did pay it because I wanted to expedite solving the problem for the tenants, but I now regret as their dishwasher is not working and I suspect the plumber failed to reconnect everything probably."

Joel R on August 2025


Avatar for Heritage Home Service

Heritage Home Service

28 Commercial Ct
4.18(
421
)
Approved Pro

Heritage Home Service

28 Commercial Ct
4.18(
421
)
Approved Pro
Customers say: Super punctual
39 years of experience
Free onsite estimate

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Excellent experience, technician arrived on time. Friendly, efficient, kept me up to date on the plan. Leak was diagnosed and toilet replaced in no time!"

Elizabeth S on July 2025

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Excellent experience, technician arrived on time. Friendly, efficient, kept me up to date on the plan. Leak was diagnosed and toilet replaced in no time!"

Elizabeth S on July 2025


Avatar for Village Home Services

Village Home Services

9 Kidder Road
5.00(
13
)
Approved Pro

Village Home Services

9 Kidder Road
5.00(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
92 local quotes requested

Village Home Services formally known as Village Electric and Village HVAC. We stand at the intersection of expertise and community spirit. With our plumbing, electrical, and HVAC services, we go beyond fixing problems; we enrich lives, one home at a time. In our village, your comfort and safety are our top priorities.

"Addressed quickly and professionally"

Mary W on October 2025

Village Home Services formally known as Village Electric and Village HVAC. We stand at the intersection of expertise and community spirit. With our plumbing, electrical, and HVAC services, we go beyond fixing problems; we enrich lives, one home at a time. In our village, your comfort and safety are our top priorities.

"Addressed quickly and professionally"

Mary W on October 2025


Avatar for A Really Good Plumber

A Really Good Plumber

5 Elder Williams Rd
4.27(
11
)
Approved Pro

A Really Good Plumber

5 Elder Williams Rd
4.27(
11
)
Approved Pro
Customers say: Quality work
32 local quotes requested
18 years of experience

At A Really Good Plumber, we pride ourselves on providing our customers with reasonable pricing, quality workmanship, and professional service on every call. When you work with A Really Good Plumber, you know you are getting high quality products and exceptional service facilitated by cutting edge technology. Our certified technicians use this technology in all installations, and to diagnose, and repair existing problems. These services will ultimately benefit the ones you love by keeping you and your family comfortable and safe all year round.

"He was very observant of all the permissions needed for a gas water heater. I definitely would recommend them to anybody easy to talk to and great work."

Dave B on December 2024

At A Really Good Plumber, we pride ourselves on providing our customers with reasonable pricing, quality workmanship, and professional service on every call. When you work with A Really Good Plumber, you know you are getting high quality products and exceptional service facilitated by cutting edge technology. Our certified technicians use this technology in all installations, and to diagnose, and repair existing problems. These services will ultimately benefit the ones you love by keeping you and your family comfortable and safe all year round.

"He was very observant of all the permissions needed for a gas water heater. I definitely would recommend them to anybody easy to talk to and great work."

Dave B on December 2024


"Eric was very precise in his work. We had some speed bumps that occurred due to the full gut of the bathroom. He dealt with problems effectively and kept us informed as to what he needed to do and why. Eric was great to work with and the end product was perfect. We would recommend Hot & Cold Plumming!"

Mill G on October 2025

SUPER SERVICE AWARD 2023, 2022, 2021, 2020, 2019,2018,2017,2016, 2015, 2014 AND 2013 PLUMBING. Hot & Cold Plumbing & Heating LLC is a full service plumbing, heating and gas-fitting company. For an immediate response to all your plumbing and heating needs, CALL (978) 701-1617.

"Eric was very precise in his work. We had some speed bumps that occurred due to the full gut of the bathroom. He dealt with problems effectively and kept us informed as to what he needed to do and why. Eric was great to work with and the end product was perfect. We would recommend Hot & Cold Plumming!"

Mill G on October 2025


Avatar for Walley’s Heating & Air Conditioning

Walley’s Heating & Air Conditioning

35 East Hollis Street
4.80(
99
)
Approved Pro

Walley’s Heating & Air Conditioning

35 East Hollis Street
4.80(
99
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
44 local quotes requested

Walley’s is not your average HVAC contractor. From our in-house sales and support center to our modern fleet of licensed technicians, our team has the tools, trucks, and training to handle all of your mechanical needs. But more than that, we are committed to giving back and playing a bigger role in our community. Through our work with local charities, educational providers, and our continued efforts towards promoting energy-efficient products, ethical business practices, and enforcing the highest industry standards, Walley’s is delivering real value to the community every day! Our entire team is grateful for the opportunity to show you what we are made of. Thank you for your consideration.

"Badly. 2 different techs came out. We paid for a Premium service and within hours of that tech coming out, our burner stopped working completely. Mind you there is a snowstorm. They sent out a new technician and he saw nothing wrong with the system at all. He said we had no oil. He said there was no footprints even going to my intake on the side of my house. It had snowed 2 times since oil was delivered, so that makes no sense. The tech was absolutely sure we had no oil. 3 days since the first visit now and we had oil delivered and the tank filled completely. Only 150 gallons went into my 250 gallon tank. So that's wrong. And I look at the front of my furnace and now see a slow drip from the front underneath the box on the front of the furnace. First tech recommended i replace the electrodes but said it didnt need it. Second tech didnt even mention that and said our system was good. Now, I will have to contact Angi for support and my insurance company. TERRIBLE TERRIBLE TERRIBLE"

Paul C on February 2025

Walley’s is not your average HVAC contractor. From our in-house sales and support center to our modern fleet of licensed technicians, our team has the tools, trucks, and training to handle all of your mechanical needs. But more than that, we are committed to giving back and playing a bigger role in our community. Through our work with local charities, educational providers, and our continued efforts towards promoting energy-efficient products, ethical business practices, and enforcing the highest industry standards, Walley’s is delivering real value to the community every day! Our entire team is grateful for the opportunity to show you what we are made of. Thank you for your consideration.

"Badly. 2 different techs came out. We paid for a Premium service and within hours of that tech coming out, our burner stopped working completely. Mind you there is a snowstorm. They sent out a new technician and he saw nothing wrong with the system at all. He said we had no oil. He said there was no footprints even going to my intake on the side of my house. It had snowed 2 times since oil was delivered, so that makes no sense. The tech was absolutely sure we had no oil. 3 days since the first visit now and we had oil delivered and the tank filled completely. Only 150 gallons went into my 250 gallon tank. So that's wrong. And I look at the front of my furnace and now see a slow drip from the front underneath the box on the front of the furnace. First tech recommended i replace the electrodes but said it didnt need it. Second tech didnt even mention that and said our system was good. Now, I will have to contact Angi for support and my insurance company. TERRIBLE TERRIBLE TERRIBLE"

Paul C on February 2025


Avatar for ACQ Home Improvement

ACQ Home Improvement

129 Edgewood Ave
4.94(
8
)
Approved Pro

ACQ Home Improvement

129 Edgewood Ave
4.94(
8
)
Approved Pro
Customers say: Quick response
25 years of experience
Free onsite estimate

With over 20 yrs of experience, ACQ Home Improvement is dedicated to providing our customers with the best quality at a great price. In addition, we are here to build relationships with our customers and communities and provide our employees with a great place to work. We look forward to working with you!

"Jeremy and crew are professional, and expert at what they do. Very customer focused and back their work 100 percent. It was a pleasure working with them"

Curt C on March 2023

With over 20 yrs of experience, ACQ Home Improvement is dedicated to providing our customers with the best quality at a great price. In addition, we are here to build relationships with our customers and communities and provide our employees with a great place to work. We look forward to working with you!

"Jeremy and crew are professional, and expert at what they do. Very customer focused and back their work 100 percent. It was a pleasure working with them"

Curt C on March 2023


"Bright knows exactly what he's doing and how to fix a major plumbing issue. Very professional, prompt, has very clear communication, is hard working, very hard working, and personable. He has the proper equipment do diagnose and fix the problem in a timely manner. His knowledge of plumbing is also exemplary. It was a pleasure doing business with him and will hire him for future jobs. Thank you Bright!"

Ava D on January 2022

We pride ourselves on reliability, communication, integrity, and quality work. We are experts in our trade. We look forward to earning your business! Please call 978-941 5561 For all drain and sewer services

"Bright knows exactly what he's doing and how to fix a major plumbing issue. Very professional, prompt, has very clear communication, is hard working, very hard working, and personable. He has the proper equipment do diagnose and fix the problem in a timely manner. His knowledge of plumbing is also exemplary. It was a pleasure doing business with him and will hire him for future jobs. Thank you Bright!"

Ava D on January 2022


Avatar for Top Dog Sewer & Drain

Top Dog Sewer & Drain

10 Morrison Road
4.87(
36
)
Approved Pro

Top Dog Sewer & Drain

10 Morrison Road
4.87(
36
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
7 years of experience

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.

"Charlie came out and in no time cleared the blockage. When I called they said about 2 hrs , he was here within an hr. He was very professional, knowledgeable and affordable. Definitely recommend this company."

Pamela P 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.

"Charlie came out and in no time cleared the blockage. When I called they said about 2 hrs , he was here within an hr. He was very professional, knowledgeable and affordable. Definitely recommend this company."

Pamela P on February 2025

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Water Heaters questions, answered by experts

The average lifespan of a water heater is eight to 12 years. If your water heater is approaching its first decade of life and is giving you problems, talk to a plumber about your replacement options.

Keep in mind that certain parts of a water heater, such as the anode rod, may need replacement long before the heater itself. An anode rod often has a lifespan of three to five years.

Depending on the brand of water heater, you may need to install an expansion tank in order to meet the conditions for warranty coverage. It’s important for consumers to read the fine print of the warranty to see if an expansion tank is necessary. Even if an expansion tank isn’t required for the warranty, it’s usually mandated by building codes—although not for tankless water heaters.

Going from a tank to a tankless water heater is one of the most effective ways to lower your utility bills. The switch also frees up more space and ensures a consistent hot water supply, as the water is heated on an as-needed basis. It costs between $5,400 and $7,400 to install a new tankless water heater. Most installation companies will also help dispose of your old water tank.

You should replace your gas water heater when it’s reached the end of its lifespan, which is a maximum of 12 years in most cases. If your unit is over a decade old and showing signs of inefficiency, leaks, or frequent malfunctions, it may be time to replace your water heater. Research how to best maintain your gas water heater to help extend its lifespan.

Signs that your water heater may explode include rust-colored water coming from hot water taps, the smell of sulfur or rotten eggs coming from the water, shaking or rumbling in the tank, and a leaky temperature and pressure valve. If the water heater feels excessively hot to the touch, it could also indicate the prospect of an explosion. If you suspect your water heater might explode, call a pro immediately to address the problem.

The Londonderry, NH homeowners’ guide to water heater services

From average costs to expert advice, get all the answers you need to get your job done.

What do you need done? We’ll find top pros.
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