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

Avatar for 1 & Done Plumbing
1 & Done Plumbing
5.0(
13
)
Tankless Water Heater - Install

Serving Cornwall, CT and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"⭐⭐⭐⭐⭐ Great experience from start to finish! They replaced my leaking hot water heater, reworked the piping, and made sure everything was properly installed and working as it should. They did a great job addressing the old piping and making the necessary repairs to ensure everything was done right. Professional, reliable, and thorough with their work. I’m very satisfied with the service and would definitely recommend them to anyone needing plumbing repairs or a hot water heater replacement!"
26 neighbors recently requested a quote
Avatar for All Around Mechanical Services, Inc.
All Around Mechanical Services, Inc.
4.6(
30
)
Water Heater - Repair or Service - For Business

Serving Cornwall, CT and surrounding areas

Approved

In business since 2011

Free estimates

Credit card accepted

"All Around Mechanical Services, Inc. and D. Scott are teriffic! He is honest and knows what he's doing...no fudging, no double talk, no bs! Does what he says and an incredible job on time or sooner! EXCELLENT, Straight A+"
1 neighbors recently requested a quote
Recommended by100%of homeowners
Premium Northeast Plumbing LLC
4.9(
4
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+3 more

Serving Cornwall, CT and surrounding areas

Approved

In business since 2023

Credit card accepted

Customers say: Quality work

"I gutted the master bathroom and redid it, hired Premium Northeast Plumbing to do all the plumbing work. Andrew the owner is awesome, professional, knowledgeable, personable and punctual. I would strongly recommend this company for any plumbing work."
Response time1 day
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Warrior Mechanical Service Company
Warrior Mechanical Service Company
5.0(
61
)
Water Heater - Install or Replace

Serving Cornwall, CT and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"Excellent! Eric installed a commercial grade hot water heater , his standard product. He used copper piping that looks really nice, he was fast, polite and courteous . Thank you warrior mechanical."
Response time3 hrs
Recommended by100%of homeowners
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Water Heaters FAQs, answered by experts

Price variations arise from size, type (tankless or tank), efficiency grades, and installation complexity, including labor and materials.

The average cost to replace a water heater is around $1,325, with a typical range of $900 to $1,800 for a standard replacement. The final price depends on the type of heater (tank vs. tankless), its size, fuel source (gas or electric), and the complexity of the installation. A simple one-to-one replacement will be on the lower end of the cost spectrum. However, if you are switching from one type of heater or energy source to another, you can expect labor costs to be significantly higher due to the extra work involved. It's also worth considering that while gas and electric heaters may have similar upfront costs, their long-term operating costs can differ based on local utility prices.

One of the primary benefits of a heat pump water heater is how cost-effective it is. How much you save will depend on your water usage and electricity costs. That being said, we can ballpark savings for the average home of between $100 and $500 per year. You can increase that savings rate by researching and applying available energy incentives available in your area. If you really want to focus on cost, consider a tankless water heater.

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.

Every type of water heater has its advantages and disadvantages. Understanding those can help you decide the best type for your situation and budget. 

Pros

  • Safer than gas or propane

  • Doesn’t require extensive venting systems

  • Lower upfront costs

  • Simpler to operate

  • No pilot light

  • Easier installation

  • More efficient heating than gas models

  • Available as point-of-use (POU) and whole-house units

Cons

  • Slower to heat water

  • Longer recovery time

  • Possibly higher operating costs

  • Doesn’t work during a power outage

  • Costs can increase without a 240-volt connection

The Cornwall, CT homeowners’ guide to water heater services

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