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

Avatar for Rardin Plumbing Heating & A/C
Rardin Plumbing Heating & A/C
4.6(
11
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Sullivan, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Excellent service.  Oscar and his crew go far and above what is necessary to fix or replace plumbing.  They are very conscientious, courteous and respectful.  They are also very considerate of your property, taking measures to insure that floors are kept clean and all debris is removed when they leave.  I will hire Rardin Plumbing and Heating again, and I highly recommend them.
"
Recommended by100%of homeowners
Avatar for McDonagh & Sons Plumbing & Sewer Inc
McDonagh & Sons Plumbing & Sewer Inc
4.1(
69
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Sullivan, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I own a two flat in the city. Today i got a call from one of my tenants telling me that there was a leak. i called mcDonoagh and Sons and within two hours, they ha a Technician come out on st Patrick's day diagnose the problem, get the appropriate parts and fix it. I was very impressed with the responsiveness and the speed of service. He also made helpful recommendations for how to maintain my water heaters.
"
Recommended by96%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 Sullivan, IL and surrounding areas

In business since 1971

Credit card accepted

"Service guy came as scheduled. Sent his "service" requirements to home base Home base calls back and lists, a very long list of what needs to be done and a very long list of what is not covered and what each item costs. The overall cost was outrageous and they weren't willing to give it to me in writing. Everything I had to pay for was overpriced, of course! They told me my other option would be to purchase my own water heater and they would reimburse me for what there water heater would cost, but no reimbursement for Labor, building permit, or any upgrades required by the local building department. The requirements of the building department were minimal. I went to Home Depot and had them do the installation and saved many hundreds of dollars. Lesson learned, have AHS do simpler repairs that don't require municipal building department approval. Have AHS pay for the equipment, and purchase installation from a trusted local installer."
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Recommended by65%of homeowners
Avatar for Green Earth Enterprises Inc
Green Earth Enterprises Inc
4.7(
7
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Sullivan, IL and surrounding areas

In business since 2009

Free estimates

Emergency services offered

We’re here to change your perceptions of what it means to be a property owner in today’s fast paced marketplace. Whether you are a landowner with rental property, or if you would like to “flip” a property you've just purchased or maybe you're a Realty Management Company seeking to prepare your managed property for the market or simply the next tenant. We're here to help you meet your needs in an affordable & efficient manner. We offer a wide array of services to choose from in whole or in part, as it fits your needs & budget. We look forward to doing business with you! Additional Emails - [email protected], [email protected], [email protected]. Additional Address - Princeton, IL 61356.

Recommended by71%of homeowners
Dick's Plumbing & Heating
New to Angi
Water Heater - Install or ReplaceWater Heater - Repair or Service

Serving Sullivan, IL and surrounding areas

In business since 2000

Free estimates

Dick's Plumbing & Heating is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 12 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

Sarah Moseley dba Nugget Plumbing and Heating
New to Angi
Water Heater - Install or Replace

Serving Sullivan, IL and surrounding areas

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

Response time3 days
Water Heaters FAQs, answered by experts

You should replace your gas water heater when it’s reached the end of its lifespan, which is a maximum of 12 years in most cases. If your unit is over a decade old and showing signs of inefficiency, leaks, or frequent malfunctions, it may be time to replace your water heater. Research how to best maintain your gas water heater to help extend its lifespan.

If your system is not vented properly, you could experience what’s called backdrafting. Backdrafting is when your ventilation system isn’t working as it should, and instead of releasing gases outside, they get trapped inside your home. 

Gas and propane water heaters create a few types of combustion gases, but the most dangerous is carbon monoxide. If there’s too much build-up of these gases inside your home, it can lead to carbon monoxide poisoning.

No, boilers and water heaters are not interchangeable because they serve different primary functions. Boilers are used for central heating systems, providing hot water or steam to heat your home. In contrast, a water heater's purpose is to supply hot water for daily household use, such as for faucets and showers. A water heater alone cannot supply the warm water or steam needed for a central heating system.

While they are not interchangeable, it is common to have both a boiler and a water heater. In fact, a conventional boiler often works best when a water heater system is already in place. The two systems can be combined to provide both heating and hot water, either by pairing a boiler with an indirect water heater or by installing a premade combination boiler-water heater unit. For home heating, some homeowners may also opt for a furnace instead of a boiler.

Yes, a heat pump water heater can work in colder climates but it’s much more effective where it’s warm. The reason is that the heat pump needs ambient warmth in the air to compress. The less warmth, the more compression required, thus using more electricity and offsetting the energy-efficient benefits.

The average cost to install a new water heater is approximately $1,300, with a typical price range between $880 and $1,800. The final cost depends on several factors, including the type and size of the unit, its location and accessibility, and the amount of labor required. For example, installing a unit in a tight space like a crawl space can increase labor costs. The type of water heater significantly impacts the price: while a conventional gas heater might cost less than $1,000, tankless models can cost around $2,600 to install (and up to $3,500), and solar heaters can cost upwards of $3,700. Other factors that can affect the total price include the fuel type, vent system requirements, permits, and whether any additional plumbing work or repairs from previous water heater damage are needed.

The Sullivan, IL homeowners’ guide to water heater services

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