How much does water expand in a water heater?

• <div><p>Water expands when heated and also when freezing. When water is heated, it expands by around 4%. For a full water heater, this is one of the main reasons malfunctions occur—the hot water has nowhere else to go but out. Due to the constant expansion and reduction in volume, it’s recommended (required in most places) that an expansion tank be installed. </p></div>

What is the lifespan of a heat pump water heater?

• <div><p>On average, a tankless water heater should last between 10 and 15 years. Its lifespan will be affected by how much it's used, the effect of weather where your home is on the unit—colder is harsher and will shorten lifespan—and if the heater is maintained appropriately and regularly. There are many signs your <a href="https://www.angi.com/articles/4-signs-your-water-heater-about-fail.htm">water heater needs to be replaced</a>, so pay attention to anything that changes with your heater or hot water. </p></div>

Can you switch to a tankless water heater from a heater with a tank?

• <div><p>Yes, you can replace a current tank water heater with a tankless model or vice versa. If you’re maintaining the same fuel source—gas or electricity—the switchover should be smooth. A conventional tank requires open floor space, while a tankless model can be wall-mounted. If you’re switching to a tank water heater, you might need to clear space for it. Gas-powered tankless water heaters need a large volume of gas when they start running to heat the water instantly. You might need to increase the size of the gas line when going from a tank to a tankless model.</p></div>

Get matched with top water heater pros in Dover, MN

Q: Can you still use water if your water heater is leaking?

• <div><p>We recommend you turn off the unit, the power, and the water supply as soon as you notice a leak. Your water heater tank should have a dedicated shut-off valve located on the cold inlet pipes. If the valve is broken or inoperable, use the shut-off valve to your home's main water supply to stop the flow to the entire house.</p><p>Avoid touching valves or pipes directly without confirming if they are hot. Wear gloves and other safety gear to keep from coming into contact with hot levers or components when turning off your leaking water heater.</p></div>

Q: What is the most efficient type of hot water heater?

• <div><p>Heat pump water heaters, also known as hybrid water heaters, are the most efficient types of water heaters&mdash;both in terms of carbon emission and energy efficiency. This type of water heater utilizes as little as half of the energy of a traditional water heater while releasing no direct emissions. Tankless water heaters are also extremely efficient, although slightly less so than hybrid heaters.</p></div>

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Verified Reviews for Water Heater Service pros in Dover, MN

*The Angi rating for Water Heater Service companies in Dover, MN is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

*The HomeAdvisor rating for Water Heater Service companies in Dover, MN is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

Last update on January 02, 2025

Reviewed in January 2025
Caleb was recommended by a friend and I could not be happier that I took the advice! He fixed my water heater issue in a timely manner and is just a nice guy. Stop looking and call Felton Plumbing.
Felton Plumbing, LLC
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Reviewed in March 2020
We had a water leak in an upstairs bathroom that damaged a downstairs ceiling and the subfloor. He brought in his subs to replace the flooring, subfloor, toilet flange, sheetrock, ceiling, popcorn texture, and painting. Everything he did and all of his subcontractors were fantastic. Highly...
Clark Custom Construction, LLC
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Reviewed in February 2020
I got a new water softener 1 week ago. So far so good. Fast and Friendly service.
Eco-Water
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Reviewed in January 2020
THE WATER SHOULD BE HOTTER.
Bill Metzger Plumbing
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Reviewed in September 2014
"BUYER BEWARE!!! We bought a Samsung washer and dryer from Appliance Village because they had a good reputation in Rochester. Our Kenmore washer had finally died and I wanted a large washer so I could wash the bedspreads. When my husband and I first arrived, the salesman did not ask what we...
Appliance Village Co
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Reviewed in October 2013
He was able to arrive earlier than planned, which was wonderful. He did excellent work and went beyond my expectations. He turned my water back on and power-washed the roof, which needed it desperately. He cleaned up after himself and left the area looking better than before. He also remembered...
Squeegee Squad
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Reviewed in October 2012
Matt came out and talked with us checking both the water heater and furnace. He found a crack in the furnace and immediately said he would order the part to fix it. He also told us the furnace part was under warranty which we did not know. The furnace was not purchased from Tri-County yet...
TRI-COUNTY PLUMBING & HEATING
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Reviewed in August 2010
I work in a commercial setting. I used K and S for everything for heating, air conditioning, and even electrical work. They were good up until the point that I needed them to work on a water heater. They did everything from installing a new gas line to putting in a new gas valve, then a new...
K & S Heating and Air Conditioning
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Reviewed in June 2010
I called this company last November, received a quote to fix a leak from my skylights and to fix the water damage in my living room. We waited until spring to complete the job because snow was starting to fall. I attempted to call the company in the spring and they called me back to set up an...
AMEK Custom Builders
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Reviewed in March 2010
Their bid was $40 per window cheaper than their competition. He included $400 extra in the bid for "worst case scenario" on the one water damaged window. They scheduled their carpenter to come out and measure the window. Upon talking to the carpenter he mentioned how they were going to...
Bob's Construction Inc
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Find Water heater pros in Dover

K&A Plumbing, LLC

4.8(

)

Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+5 more

Serving Dover, MN and surrounding areas

Approved

In business since 2018

Free estimates

Offers commercial services

"Derrick and Eric, did a terrific job, they replaced our water heater the same day that I Called. Derrick even replace a water shut off control that had been bothering us They are a couple of guys that really do a great job for their customers. They are really service oriented. They are my first and only call for my plumbing needs. A +++"

25 neighbors recently requested a quote

Recommended by38%of homeowners

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Water Works Plumbing, LLC

4.7(

)

Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+3 more

Serving Dover, MN and surrounding areas

In business since 2010

Free estimates

Emergency services offered

Water Works Plumbing, LLC provides local area clients with superior quality plumbing services. With years of experience in the industry, you can be sure your project will be handled promptly and professionally. Call Water Works Plumbing, LLC today to set an appointment for your local project! 24 hour emergency services provided!

Recommended by96%of homeowners

Water Heater - Install or ReplaceWater Heater - Repair or Service

Serving Dover, MN and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"Caleb was recommended by a friend and I could not be happier that I took the advice! He fixed my water heater issue in a timely manner and is just a nice guy. Stop looking and call Felton Plumbing."

Response time1 day

Recommended by91%of homeowners

Water Heater - Install or ReplaceWater Heater - Install or Replace - For Business

Serving Dover, MN and surrounding areas

In business since 2018

Free estimates

Offers commercial services

"They responded right away, and we were able to get the installation of the water softener done in a very reasonable amount of time. Would highly recommend this company."

Response time3 hrs

Recommended by100%of homeowners

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American Home Shield – Home Warranty

3.5(

5,688

)

Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Dover, MN and surrounding areas

In business since 1971

Credit card accepted

"He was very nice to talk with and repaired our washing machine. He even helped sweep the water out."

Recommended by65%of homeowners

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Petteys Plumbing LLC

New to Angi

Tankless Water Heater - InstallWater Heater - Install or ReplaceWater Heater - Repair or Service

Serving Dover, MN and surrounding areas

In business since 2024

Free estimates

Offers commercial services

We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. \nBeing a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!\n

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B&F Plumbing & Sons

New to Angi

Tankless Water Heater - InstallWater Heater - Install or Replace

Serving Dover, MN and surrounding areas

In business since 2013

Free estimates

We are 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.\n

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Household Water Softening

New to Angi

Water Heater - Install or Replace

Serving Dover, MN and surrounding areas

In business since 1994

Free estimates

Credit card accepted

20 years of experience.

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QualityFast

New to Angi

Water Heater - Install or ReplaceWater Heater - Repair or ServiceWater Heater - Repair or Service - For Business

Serving Dover, MN and surrounding areas

In business since 2022

Free estimates

Emergency services offered

QualityFast 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.

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Water Heaters questions, answered by experts

We recommend you turn off the unit, the power, and the water supply as soon as you notice a leak. Your water heater tank should have a dedicated shut-off valve located on the cold inlet pipes. If the valve is broken or inoperable, use the shut-off valve to your home's main water supply to stop the flow to the entire house.

Avoid touching valves or pipes directly without confirming if they are hot. Wear gloves and other safety gear to keep from coming into contact with hot levers or components when turning off your leaking water heater.

Water expands when heated and also when freezing. When water is heated, it expands by around 4%. For a full water heater, this is one of the main reasons malfunctions occur—the hot water has nowhere else to go but out. Due to the constant expansion and reduction in volume, it’s recommended (required in most places) that an expansion tank be installed.

On average, a tankless water heater should last between 10 and 15 years. Its lifespan will be affected by how much it's used, the effect of weather where your home is on the unit—colder is harsher and will shorten lifespan—and if the heater is maintained appropriately and regularly. There are many signs your water heater needs to be replaced, so pay attention to anything that changes with your heater or hot water.

Yes, you can replace a current tank water heater with a tankless model or vice versa. If you’re maintaining the same fuel source—gas or electricity—the switchover should be smooth. A conventional tank requires open floor space, while a tankless model can be wall-mounted. If you’re switching to a tank water heater, you might need to clear space for it. Gas-powered tankless water heaters need a large volume of gas when they start running to heat the water instantly. You might need to increase the size of the gas line when going from a tank to a tankless model.

Heat pump water heaters, also known as hybrid water heaters, are the most efficient types of water heaters—both in terms of carbon emission and energy efficiency. This type of water heater utilizes as little as half of the energy of a traditional water heater while releasing no direct emissions. Tankless water heaters are also extremely efficient, although slightly less so than hybrid heaters.

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