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TRUSTED BY DOVER, MA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon231
    Verified water heater services reviews

Top-Rated Water heater pros in Dover - Updated Nov 2026

Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Dover, MA and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Excellent. The serviceman arrived on time, was knowledgable. He explained what he was doing. He went right to work and completed his work in an appropriate amount of time. Very pleased with their work. Already set up an appointment for the fall heater tuneup!"
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+2

Response time12 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Dover, MA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Live Your Most Comfortable Life with a Company You Trust. \nWe offer Same Day Service and Next Day Installation! \n \nSila 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. \nWe guarantee satisfaction and are proud to have earned over 7,000 ?A? ratings on Angie?s List and its prestigious Super Service Award!

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+6

47 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for David M. Clay Plumbing& Heating
David M. Clay Plumbing& Heating
4.1(
178
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Install - For Business+5 more

Serving Dover, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Warranties offered

"David helped me install Heat Pump Water Heater that I purchased from Home Depot. It was his first time installing a heat pump water heater but he made sure it gets installed as per code and right way. He worked with me to install stop valve in the end."
Plumbing Project
On demand waters for nail salon
Plumbing Project
Installed 6 new wall mounted gas water boilers 96 Afue
Converted a old fire station to a residential home and this is one of the bathroom we installed

+21

Response time1 day
Response rate100%
19 neighbors recently requested a quote
Avatar for Reservoir Home LLC
Reservoir Home LLC
4.8(
14
)
Water Heater - Install or Replace

Serving Dover, MA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Our mission is to make home electrification easy, affordable and awesome. We turn your water heater into a thermal battery. A Reservoir puts a heat pump, an onboard computer and industrial hydronic controls in one unit. It heats and stores water when electricity is cheapest and cleanest and holds it until your house needs it. \n

Reservoir Installs
Reservoir Installs
Reservoir Installs
Reservoir Installs
Reservoir Installs

+5

27 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for Gentille Plumbing and Heating
Gentille Plumbing and Heating
5.0(
28
)
Water Heater - Repair or ServiceTankless Water Heater - InstallTankless Water Heater - Install - For Business+5 more

Serving Dover, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"My grandson flushed his little yellow bus down the toilet Friday afternoon. I called several plumbers in the area. By late Saturday afternoon I had only 1 returned call saying they could come out Monday morning. A friend suggested I call Gentille Plumbing and Heating. I called them and they said they could come early Sunday morning. Ryan arrived promptly as promise and quickly determine how to approach the issue and retrieved the little yellow bus. Cleanup was quick and pricing fair. Ryan was professional , friendly and was on his way within 45 minutes of arrival. Thank You Gentille Plumbing and Heating"
Response time6 hrs
Response rate96%
40 neighbors recently requested a quote
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
168
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace

Serving Dover, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"I called the company on Sunday evening and they responded promptly early in the morning. My system was installed by them 3 years ago but somehow I missed last year's annual servicing. With the current heat wave it was severely underperforming. They sent out Robert Duclos within the hour. He diagnosed the problem---not enough Freon in the system, grass and mulch build-up in the compressor, valves buried under the landscaping--and fixed it all for the price of the annual service contract. I would definitely recommend them for anyone needing central a/c work."
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
60 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Pro Comfort Control LLC
Pro Comfort Control LLC
5.0(
25
)
Water Heater - Install or Replace

Serving Dover, MA and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Replaced my water heater in an emergency and went tankless. Super happy with the entire team. They provided me temporary hot water and came back the next day to put on the tankless water heater. They gave me options and I’m happy with going tankless"
Outdoor Heat Pump
Charging it all up!
Gas Boiler
Ductless Mini-split
Ductless indoor unit

+51

1 neighbors recently requested a quote
Recommended by79%of homeowners
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Showing 1-10 of 162
Water Heaters FAQs, answered by experts

While not all homes require a hot water heater expansion tank, they are necessary in most newer homes and are often mandated by local building codes. Codes typically require an expansion tank if your plumbing system is a 'closed-loop' system, which often includes a backflow preventer or pressure regulator on the main water line. Some municipalities have specific requirements. Installing an expansion tank on a closed system is crucial, as it prevents excess pressure that can damage your water heater and other appliances, potentially shortening their lifespan. However, tankless water heaters do not require an expansion tank.

Not all types of water heaters require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation.

Electric water heaters typically last 10 to 20 years, though proper maintenance can extend their lifespan. If your unit is over a decade old and showing signs of inefficiency—such as higher energy bills, frequent repairs, or leaks—replacement is a smart investment. Tankless models last over 20 years, which can make them a longer-lasting alternative to traditional tank water heaters.

Your water heater's age can affect your homeowners' insurance policy. Many policies will ask how old the heater is when you first apply for a policy—and they may make you replace a model that's over 10 years old. 

Even if your policy permits you to have an older heater, it may significantly reduce the amount of protection available. If an older water heater suddenly leaks and causes damage to parts of your home, your policy may not cover it.

While a water heater explosion is rare, it is a serious danger. Be aware of these critical warning signs:

  • Sulfur or Rotten Egg Smell: This is a major red flag, especially for gas water heaters. It can indicate a gas leak, which could ignite and cause an explosion.

  • Leaking Pressure Valve: If the temperature and pressure (T&P) relief valve is leaking, it may not be able to properly regulate internal pressure, creating a risk of bursting.

  • Shaking or Rumbling: Loud rumbling or shaking from the tank can be a sign of extreme pressure buildup.

  • Excessive Heat: If the exterior of the water heater feels unusually hot to the touch, the unit may be overheating dangerously.

  • Rust-Colored Water: This can be a symptom of severe internal corrosion that compromises the tank's integrity.

If you notice any of these signs, especially a gas smell, you must act immediately. Shut off the gas supply to the water heater and call a professional plumber right away to prevent a potential disaster.

The Dover, MA homeowners’ guide to water heater services

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