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>

How long does it take to replace a water heater?

• <div><p>The time it takes to replace a water heater depends on the complexity of the job. Expect your contractor to spend:</p><ul><li><p>One to three hours on a standard tank-style water heater replacement</p></li><li><p>Two to three hours on a tankless water heater replacement</p></li><li><p>Four to six hours replacing a tank-style water heater with a tankless water heater</p></li><li><p>One hour for each additional parallel or point-of-use water heater</p></li></ul><p>Your project will take longer if you’re switching fuel sources, upgrading to tankless, or relocating your water heater.</p></div>

Get matched with top water heater pros in Sidon, MS

Q: Are electric water heater venting and installation requirements the same from state to state?

• <div><p>No state requires you to vent an electric water heater. Other installation requirements for water heaters will vary, though, depending on the state and local jurisdiction in which you live. Some places require permits, while others don&rsquo;t. Some may force you to place the appliance a certain distance from any walls or other appliances, while others don't. When you find a <a href="https://www.angi.com/articles/who-can-install-water-heater.htm">local professional to install a water heater</a>, this expert will ensure you follow all the local regulations. </p></div>

Q: What is the proper way to vent a gas water heater?

• <div><p>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.</p></div>

Q: Should I replace my 20-year-old gas water heater?

• <div><p>If your gas water heater is over 20 years old, it should be replaced. Gas water heaters can last up to 12 years and while they can exceed this expectancy if well-maintained, a heater that's 20 years old would require replacement. The heater is unlikely to run as efficiently as a new model and could be more expensive to do so.</p></div>

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Verified Reviews for Water Heater Service pros in Sidon, MS

*The Angi rating for Water Heater Service companies in Sidon, MS 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 Sidon, MS 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 November 22, 2025

Reviewed in September 2014
Excellent! Very good work by a friendly, dependable plumber who doesn't overcharge or find "something else wrong."
Emergency Plumber
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Reviewed in July 2012
The installation service was good, but after he installed it the hot water temperature wasn't high enough because he forgot to adjust it, and he went on vacation so I had to wait until he got back to fix it. Even then I had to call him to remind him, so I wouldn't rate the responsiveness very...
Bruce King Plumbing
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Reviewed in July 2014
I called about 7 AM and they were on the here at a little after 8 AM. They immediately looked at the water heater and found the problem. The heater was over 12 years old and I told them to replace it. They left and returned with a new heater and had it installed in less than an hour. I had a...
Ray Miller Plumbing
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Reviewed in September 2013
I recently purchased a foreclosed home so of course there were some repairs needed even though the realtor had "everything repaired" I placed a phone call about a leaky gas line to the water heater and Mr Rooter sent someone out in less than 2 hours. The tech was great and extremely patient with...
Mr. Rooter Plumbing of Tupelo and Oxford
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Reviewed in October 2015
DID A GREAT JOB. HAD QUITE A BIT OF MANUAL LABOR AND WAS BY HIMSELF FOR THE DAY. HE DID IT HIMSELF RATHER THAN WAITING UNTIL ANOTHER DAY FOR HIS HELP TO COME DO IT.
Bobby Wilson Plumbing
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Reviewed in February 2016
Tom is a honest decent professional who is detail oriented and did not leave until he was sure both my hot water heater & furnace were working; he even changed the bulbs & adjusted the ceiling light for this short senior citizen. He has done work before for me and I have only good things to say...
Dirty Works Services, LLC
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Reviewed in June 2014
We were real pleased with what he did. It had to be done by a licensed plumber. He did a good job because it was pouring down rain and freezing cold. I would recommend him. He did good work and it was reasonably priced. He even gave receipts for all the parts that he had to buy that we...
rick hoskins
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Find Water heater pros in Sidon

Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

Customers say: Super punctual

Recommended by 94% of Angi customers

29463 local quotes requested

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"Did a great job "

Don F on November 2025

"Did a great job "

Don F on November 2025

Triton Construction Company

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Triton Construction Company

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10 years of experience

Triton Construction Company has 3 employees! We have a page on Facebook where are pictures of our jobs are it is under Triton Construction Company! We love helping people for a cheap and reasonable price. Thanks and have a great day!!!

Krell Distributing Co Inc

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Krell Distributing Co Inc

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53 years of experience

Additional DBA - Krell Industries. Family owned & operated. Nationwide service.

Southern Sewer And Drain

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Southern Sewer And Drain

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10 years of experience

Locally owned and operated, family plumbing services dedicated to providing all customers with Quality and Dependable customer service. We do it all, The complete plumbing service.

David's Plumbing

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David's Plumbing

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24 years of experience

From plumbing repairs to installations, we can help with your pipe problem! Need pipe, septic, water heater, or irrigation system fix? With over 14 years of experience, we can help you through our reliable and affordable service.

Solar Wolf Energy

2.00(

)

Solar Wolf Energy

2.00(

)

10 years of experience

Solar Wolf is a full service solar company with a great reputation and an old world belief to our customers. To under-promise and over-deliver, period. We have 18 years experience in construction, remodeling, roofing, solar water heaters, solar pv systems, battery back-up systems and much more. See what Solar Wolf Energy can do for you!

Trust our proven reputation to take care of your plumbing needs. We have been voted reader's choice best plumber in the triangle for 2 years running. As we're licensed, bonded, and insured master plumber, you can count on us.

Liberty Plumbing LLC.

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Liberty Plumbing LLC.

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With over 20 years of experience, we're the best choice for all your plumbing needs.

Mark's Home Improvement

5.00(

)

Mark's Home Improvement

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

We do a lot of remodeling. Our main concern is to make our customers happy. We are experienced in all of the construction job titles. Quality is the key.

Showing 1-10 of 25

Water Heaters questions, answered by experts

No state requires you to vent an electric water heater. Other installation requirements for water heaters will vary, though, depending on the state and local jurisdiction in which you live. Some places require permits, while others don’t. Some may force you to place the appliance a certain distance from any walls or other appliances, while others don't. When you find a local professional to install a water heater, this expert will ensure you follow all the local regulations.

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.

The time it takes to replace a water heater depends on the complexity of the job. Expect your contractor to spend:

One to three hours on a standard tank-style water heater replacement
Two to three hours on a tankless water heater replacement
Four to six hours replacing a tank-style water heater with a tankless water heater
One hour for each additional parallel or point-of-use water heater

Your project will take longer if you’re switching fuel sources, upgrading to tankless, or relocating your water heater.

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.

If your gas water heater is over 20 years old, it should be replaced. Gas water heaters can last up to 12 years and while they can exceed this expectancy if well-maintained, a heater that's 20 years old would require replacement. The heater is unlikely to run as efficiently as a new model and could be more expensive to do so.

The Sidon, MS homeowners’ guide to water heater services

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

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