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

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 Waterloo, IL 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 Froggy's Heating & Air LLC
Froggy's Heating & Air LLC
4.2(
143
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Waterloo, IL and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"When my house was built 25 years ago the wrong gas line, type M was installed.  Earlier this year me and other neighbors were informed by letter from our county that when we had a new gas water heater installed we would also have to update the gas line to code.   Jeremiah had to replace the copper line with 'iron' lines, he did a great job!!  He is very knowledgeable, friendly and helpful
with questions I ask him.  When I need a new air conditioning and heating unit Froggy's Heating & Air will be the first company I will contact."
Working hard for you.
We do plumbing too
Look for our truck
Recommended by84%of homeowners
Avatar for Spengler Plumbing, Heating and Cooling
Spengler Plumbing, Heating and Cooling
3.8(
75
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Waterloo, IL and surrounding areas

In business since 1971

Emergency services offered

Credit card accepted

"Our water heater went out the other night. I called and explained what was going on and they assured me that someone will be out as soon as possible.  A bit later the technician came to the house ,first he greeted us then he put on his shoe covers before coming into the house.  When I showed the technician the problem he was very patient in explaining to me what all needed to be done and he answered all my questions in a way that i could understand. I was impressed with his knowledge of the business but more impressed with his people skills. That night was our first time to call a plumber and if we ever need one again we will definitely call them!"
Recommended by68%of homeowners
Avatar for CG Handyman Services
CG Handyman Services
5.0(
13
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Waterloo, IL and surrounding areas

In business since 2009

Emergency services offered

Over 25 Years Experience,Also work as a plumber for the government contractor, also served as a plumber instructor for Vatterott college,Home Advisor as a plumber, Handyman Connection as a plumber, family own business since 2009. BBB Accredited Business.

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+6

Recommended by100%of homeowners
Avatar for All State Mechanical, LLC
All State Mechanical, LLC
4.2(
34
)
Water Heater - Install or Replace

Serving Waterloo, IL and surrounding areas

In business since 2017

Free estimates

Credit card accepted

Welcome to All State Mechanical, LLC. We are family owned and operated. We are a full-service HVAC and mechanical contractor. From St. Louis to Columbia, to Cape Girardeau to Poplar Bluff, we have you covered in Missouri. From Jerseyville to Cair, we have you covered in Illinois as well. Our workmanship and quality of service is top of the line in both residential and commercial service.

furnace
Response time12 hrs
Recommended by92%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Waterloo, IL and surrounding areas

In business since 1971

Credit card accepted

"The yearly service works out to be $50 a month. We've had two water heaters replaced through them because of a fault in them. They're usually very responsive. I like that I can request the service online. The only thing is, I wish that there was a better avenue for emergency services. If something doesn't work right away usually it takes a couple of days to get someone out and sometimes you can't wait two days without water."
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+2

Recommended by65%of homeowners
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Water Heaters FAQs, answered by experts

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.

You can use multiple tankless water heaters, but that doesn’t mean you should. Adding multiple tankless heaters adds considerable cost to your home in both parts and installation costs. Also, you’re adding many more points of failure in the system, making plumbing issues harder to diagnose. More heaters mean more maintenance, and insurers may want a word regarding the increased risk of water damage. A single, larger unit makes more sense in most situations.

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.

A tankless water heater can last up to 20 years, which is nearly double the lifespan of a conventional tank heater. However, their longevity is highly dependent on several factors. With proper installation and regular maintenance, such as descaling to prevent mineral buildup from hard water, you can expect a lifespan of 15 to 20 years. Without proper care, a tankless unit may begin to fail in as little as 12 years. Other factors that affect its lifespan include household usage and the quality of the local water supply. While they have a higher upfront cost, their energy savings, smaller size, and longer life make them a worthwhile investment for many homeowners.

Due to the high temperature, using stainless steel vent pipes for your tankless water heater’s exhaust vent is best. Also, it is safe to use a flexible vent duct as the exhaust fan. If installing the exhaust fan yourself, make sure you are using heat-resistant silicon to connect the exhaust vent and the duct on your water heater.

The Waterloo, IL homeowners’ guide to water heater services

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