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

Avatar for Mr. Rooter Plumbing of St. Charles
Mr. Rooter Plumbing of St. Charles
4.9(
7
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Union, MO and surrounding areas

Approved

In business since 2001

Emergency services offered

Warranties offered

"I called Mr. Rooter because I had called another Plumbing company to come out the night before and they were a no show.  They were extremely friendly over the phone.  I called at approx 8AM and said they'd be able to come out by 11AM.  They called at about 9:30 to say someone was available to come out now and I said that was perfect.  They arrived at 10AM.

Jason was the plumber who arrived and he was very very friendly and professional.  I told him the problem and we discussed pricing up front.  I had a coupon which he said they would definitely honor.  He immediately got to work.  He wore footies over his shoes while in the house.  He worked diligently and answered all of my questions.  After about an hour and being certain the line was clear he cleaned up, we took care of payment which was exactly what was discussed beforehand, and he was on his way.

A very pleasant and hassle free experience.  I will definitely be calling Mr. Rooter for the Franklin County area again for any plumbing needs and would recommend them to anyone needing this kind of work.

The job also comes with a 30 day warranty which I thought was great and definitely put my mind at ease just in case something happened again."
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+2

1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Tap Heating & Cooling
Tap Heating & Cooling
4.5(
19
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Union, MO and surrounding areas

In business since 2006

Emergency services offered

Credit card accepted

"They were very good. I had two different residencies. So I used one of the Angie's List big deals at each location. They were on time, very prompt and professional. They were very easy to work with. I was very pleased. With regard to price, they were very reasonable. I didn’t feel like I was pressured to buy anything additional that I didn’t need. They told me exactly what was going on. Their responsiveness and punctuality were very good. I love the email system that they have. As soon as I buy a coupon, they send me an email and say let's schedule this. I love that because it's a very easy way to communicate without having to get calls all day. I would absolutely sue them again in the future. I have to give them extra kudos as well because I did have two residences. I had my Harrisonville address on record. I was waiting for them 6:10.9 to 6:15.1probably about 15-20 miles away from this address. I thought that they would be out here anytime. Then it dawned on me that I did not give them the updated address. So I called them immediately and said that it was my mistake for sending them the wrong address. They were very gracious in owning up to my mistake."
install
Cage
Installers Van
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+5

Recommended by94%of homeowners
Avatar for JONES AIR & WATER
JONES AIR & WATER
5.0(
8
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Union, MO and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"We had Jones Air & Water come out to install filtration and replace a catalytic core system that we had installed to prevent descaling. In our situation, we had a high volume of Chlorine in the water that you could definitely smell and taste. The catalytic core system, didn't live up to the expectations and we still had to deal with a heavy scale build up noticeable on all of our faucets and with two Rinnai units for on demand hot water that raised concerns about what type of build up we were having on what we couldn't see. Everett came out and was very thorough in testing the water and then explaining a recommended solution. We finally decided on a dual media tank solution that Everett and JD installed that provides us with an efficient way to not only handle the Chlorine issue, but truly conditions the water and we're noticing all of the differences that Everett explained we should see. We are very satisfied with the whole process from the review of what our situation is, the recommended solution, the installation and the end result. We highly recommend using Everett for a water treatment solution."
Recommended by100%of homeowners
Avatar for Re-Bath
Re-Bath
4.2(
38
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Union, MO and surrounding areas

In business since 1979

Free estimates

Credit card accepted

"Overall, Rebath people are pleasant to work with. Brendan was a top notch craftsman, 'BJ' in office stayed in touch as work progressed. there were some problems with ordering product, receiving wrong product, miscommunication in scheduling, which delayed completion of job beyond our expectations. However job was completed to our satisfaction at last, and quality of product and of work are good.
"
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+8

Recommended by70%of homeowners
Avatar for Collective Enterprise
Collective Enterprise
5.0(
20
)
Tankless Water Heater - InstallWater Heater - Install or ReplaceWater Heater - Install or Replace - For Business+1 more

Serving Union, MO and surrounding areas

In business since 2021

Free estimates

Emergency services offered

"Mr Sam did a wonderful job removing a bad water heater and installed a new one. He also reconfigured my plumbing under the kitchen sink and installed a new sink and faucet. He was on time, polite, patient with my son who asked a million questions, and left a tidy workspace when finished. I am excited to hire him again for my many other projects that are needing done. I highly recommend this company."
Response time2 days
Response rate99%
2 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

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.

Choosing between an electric water heater vs. a gas water heater comes down to personal preference. Overall, electric heaters are more energy efficient than their gas competitors. They’re also quieter to operate, take up less room, and don’t come with a risk of gas leaks. 

The downside is that electric water heaters cost more to operate than gas. They might also struggle to heat water fast enough for households that use large amounts of hot water. Lastly, a power outage could cause your electric water heater to stop working, whereas gas water heaters may still function.

It takes between one and three hours to replace a hot water heater element, depending on whether you hire a pro or do the work yourself. For example, a professional plumber with all the necessary tools and experience can often finish the job in one to two hours, whereas DIY will take two to three hours because it'll involve more preparation and troubleshooting.

When the water expands in a hot water heater, it puts pressure on your hot water pipes and can cause leaks or a rupture in the hot water tank under certain conditions. Pipes or water heaters may split due to the pressure where there is a backflow preventer that prevents the hot water heater from diffusing pressure by releasing water back to the public water line.

In these scenarios, a hot water heater expansion tank provides a place for the hot water heater to relieve pressure and prevent bursts and leaks.

Every city and state will have its own set of installation codes and laws. Some won’t require you to obtain a permit before replacing your water heater, though we recommend you do, regardless of the local codes. On the other hand, some cities and states might require secondary permits for plumbing and electrical work related to the installation. Check with a local water heater installation company and local building codes to confirm which permits are required and what the specific laws are.

The Union, MO homeowners’ guide to water heater services

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