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TRUSTED BY MERRIMACK, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon44
    Verified water heater services reviews

Find Water heater pros in Merrimack

Ayotte Home Improvements

4.93(
67
)
Approved Pro

Ayotte Home Improvements

4.93(
67
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
90 local quotes requested

Ayotte Home Improvements is a fully licensed and insured remodeling/construction company. We offer free estimates and years of experience.Take a look at our website for some of our past projects.

"Bob was great- this was our first renovation as new homeowners and he helped us through the process, answering all of our questions and listening to what we wanted. We absolutely love the end result!"

John A on January 2025

Ayotte Home Improvements is a fully licensed and insured remodeling/construction company. We offer free estimates and years of experience.Take a look at our website for some of our past projects.

"Bob was great- this was our first renovation as new homeowners and he helped us through the process, answering all of our questions and listening to what we wanted. We absolutely love the end result!"

John A on January 2025


E Star HVAC

New on AngiNew on Angi
Approved Pro

E Star HVAC

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

E Star HVAC LLC 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.

E Star HVAC LLC 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 ACQ Home Improvement

ACQ Home Improvement

4.94(
8
)
Approved Pro

ACQ Home Improvement

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 JMS Plumbing and Heating, LLC

JMS Plumbing and Heating, LLC

4.66(
28
)
Approved Pro

JMS Plumbing and Heating, LLC

4.66(
28
)
Approved Pro
Customers say: Quick response
25 years of experience
Free onsite estimate

Whether you need a simple faucet installation or complete waterline replacement, we offer a wide range of residential and commercial plumbing services to meet your needs. We continually strive to exceed expectations by ensuring that each client receives the very best service. Individualized Plumbing Options We strive to exceed expectations by ensuring all your plumbing work is completed to the highest standards. We will provide you with a free consultation to explain all of your available options so you can choose the scope or work that?s right for your home or business.

"great service and 5 star results "

Mikes V on January 2025

Whether you need a simple faucet installation or complete waterline replacement, we offer a wide range of residential and commercial plumbing services to meet your needs. We continually strive to exceed expectations by ensuring that each client receives the very best service. Individualized Plumbing Options We strive to exceed expectations by ensuring all your plumbing work is completed to the highest standards. We will provide you with a free consultation to explain all of your available options so you can choose the scope or work that?s right for your home or business.

"great service and 5 star results "

Mikes V on January 2025


Avatar for Easy A's Plumbing & Heating, LLC

Easy A's Plumbing & Heating, LLC

4.50(
3
)
Approved Pro

Easy A's Plumbing & Heating, LLC

4.50(
3
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

Welcome to Easy A's Plumbing & Heating, LLC. We are excited to exceed your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices, and customer satisfaction is our number one priority. Call us now!

"It took much longer than expected, but they were so much more reasonable price wise, it was worth the wait."

Paula S on July 2019

Welcome to Easy A's Plumbing & Heating, LLC. We are excited to exceed your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices, and customer satisfaction is our number one priority. Call us now!

"It took much longer than expected, but they were so much more reasonable price wise, it was worth the wait."

Paula S on July 2019


Avatar for Derry Plumbing & Heating

Derry Plumbing & Heating

4.50(
30
)
Approved Pro

Derry Plumbing & Heating

4.50(
30
)
Approved Pro
Customers say: Quality work
36 years of experience
Free onsite estimate

If you�re familiar with plumbing, you know that doing it right takes just the right recipe: two parts job knowledge and three parts skill. At Londonderry Plumbing and Heating, we provide everything you need to secure the perfect plumbing solution, a mixture that will do you right, just like home cooking! No job is too small or too challenging for our dedicated professionals! Londonderry Plumbing and Heating can tackle your most challenging plumbing problems and do so at affordable rates. If you are looking for a plumber who is highly qualified, quick to respond and a pleasure to do business with, give us a call. We look forward to adding you to our list of satisfied customers!

"Once again Derry Plumbing has met all my expectations for quality work and complete professional service. Mike and Christian just removed a tub unit and replaced with a walk-in shower unit. They were courteous, answered all my questions and kept everything spotlessly clean every day, I've used them for years and will continue to do so and will recommend them to friends!"

Karen N on August 2022

If you�re familiar with plumbing, you know that doing it right takes just the right recipe: two parts job knowledge and three parts skill. At Londonderry Plumbing and Heating, we provide everything you need to secure the perfect plumbing solution, a mixture that will do you right, just like home cooking! No job is too small or too challenging for our dedicated professionals! Londonderry Plumbing and Heating can tackle your most challenging plumbing problems and do so at affordable rates. If you are looking for a plumber who is highly qualified, quick to respond and a pleasure to do business with, give us a call. We look forward to adding you to our list of satisfied customers!

"Once again Derry Plumbing has met all my expectations for quality work and complete professional service. Mike and Christian just removed a tub unit and replaced with a walk-in shower unit. They were courteous, answered all my questions and kept everything spotlessly clean every day, I've used them for years and will continue to do so and will recommend them to friends!"

Karen N on August 2022


Avatar for Septic Designs of NH, LLC

Septic Designs of NH, LLC

4.75(
25
)
Approved Pro

Septic Designs of NH, LLC

4.75(
25
)
Approved Pro
Customers say: Terrific value
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
20 local quotes requested

Septic Designs of NH LLC is a Veteran owned small business with BBB accreditation. We take great pride in our work and are not satisfied until you are. We do Septic Designs, Inspections, Tank Replacements, and Septic Repairs. We also clear main sewer lines and do Trenchless Pipe Repair. Which is a NO DIG solution for pipe replacements. Our jetter is also a HEATED jetter for that tough grease or other buildup where you need some extra hot water to really clean the pipe.

"I called every plumber around and Septic Design of NH had the best price to put a camera down the sewer line. Problem was located in no time."

Vickie C on September 2021

Septic Designs of NH LLC is a Veteran owned small business with BBB accreditation. We take great pride in our work and are not satisfied until you are. We do Septic Designs, Inspections, Tank Replacements, and Septic Repairs. We also clear main sewer lines and do Trenchless Pipe Repair. Which is a NO DIG solution for pipe replacements. Our jetter is also a HEATED jetter for that tough grease or other buildup where you need some extra hot water to really clean the pipe.

"I called every plumber around and Septic Design of NH had the best price to put a camera down the sewer line. Problem was located in no time."

Vickie C on September 2021


Avatar for Patriot Bath Remodeling LLC

Patriot Bath Remodeling LLC

4.80(
10
)
Approved Pro

Patriot Bath Remodeling LLC

4.80(
10
)
Approved Pro
Customers say: Quick response
246 local quotes requested
1 years of experience

Patriot was established by four industry leaders with over 50 years of collective experience. Drawing from extensive collaboration with major home improvement corporations, we developed a strategic vision that culminated in the formation of Patriot. Our motivation stemmed from identifying inefficiencies within prominent home improvement firms and their impact on everyday consumers. At Patriot, our mission is rooted in a commitment to serve the community.

"Although I am pleased with the completed shower, I did not have a great experience. Mason was the sales man, and he was lovely except during the sales process he showed me doors that they no longer stock. No big deal except the doors that we agreed on were not what was delivered. Jim the project manager came out and measured the enclosure , then ordered what we had agreed and put a deposit on. We were told it may take 10 weeks to come in?. It did. The team came in the following week and removed the old tub and walls, did all the prep and plumbing on Monday. We were told as soon as the plumbing inspector came out , and passed their work they would come right back out and start the installation. Passed at 10 AM Tuesday morning, Jim said he would send a crew that afternoon, no one showed up. This went on till Friday, keep in mind, I only have one shower. Friday arrived, the installer was here with everything needed to install my new shower. About a half hour later the installer let me kn"

Mary M on November 2025

Patriot was established by four industry leaders with over 50 years of collective experience. Drawing from extensive collaboration with major home improvement corporations, we developed a strategic vision that culminated in the formation of Patriot. Our motivation stemmed from identifying inefficiencies within prominent home improvement firms and their impact on everyday consumers. At Patriot, our mission is rooted in a commitment to serve the community.

"Although I am pleased with the completed shower, I did not have a great experience. Mason was the sales man, and he was lovely except during the sales process he showed me doors that they no longer stock. No big deal except the doors that we agreed on were not what was delivered. Jim the project manager came out and measured the enclosure , then ordered what we had agreed and put a deposit on. We were told it may take 10 weeks to come in?. It did. The team came in the following week and removed the old tub and walls, did all the prep and plumbing on Monday. We were told as soon as the plumbing inspector came out , and passed their work they would come right back out and start the installation. Passed at 10 AM Tuesday morning, Jim said he would send a crew that afternoon, no one showed up. This went on till Friday, keep in mind, I only have one shower. Friday arrived, the installer was here with everything needed to install my new shower. About a half hour later the installer let me kn"

Mary M on November 2025


Avatar for Long Home

Long Home

4.68(
167
)
Approved Pro

Long Home

4.68(
167
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
241 local quotes requested

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing projects and specialize in asphalt shingle installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Long Home did an awesome job installing my new shower, vanity, and bathroom floor. It looks beautiful!"

Peter M on April 2025

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing projects and specialize in asphalt shingle installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Long Home did an awesome job installing my new shower, vanity, and bathroom floor. It looks beautiful!"

Peter M on April 2025

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Water Heaters questions, answered by experts

Due to the high temperature, using stainless steel vent pipes for your tankless water heater’s exhaust vent is best. Also, it is safe to use a flexible vent duct as the exhaust fan. If installing the exhaust fan yourself, make sure you are using heat-resistant silicon to connect the exhaust vent and the duct on your water heater.

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

When replacing an old unit, you might want to switch from a gas water heater to an electric water heater or vice versa. To do this, you will likely need to add infrastructure to the area. For example, you likely don’t have a gas line that served your old electric water heater. You’d have to call a plumber to put in a new gas line. If you’re replacing a gas unit with an electric one, the plumber will need to safely cap the old gas line. You will then need an electrician to add wiring for the new electric unit.

The right way to vent a gas water heater is to have a pipe directly upward or slopes upward out of the house. Because hot air naturally rises, this type of venting will efficiently ensure that all gas moves out of the house. Your system may rely on fans or blowers as well.

The cost to replace a water heater depends on the type you choose (tank versus tankless) and the fuel type. You can expect to pay anywhere from $880 to $1,780 for a one-to-one replacement. If you’re switching from one type or energy source to another, labor costs will rise significantly for the extra amount of work. 

The Merrimack, NH homeowners’ guide to water heater services

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