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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon61
    Verified water heater services reviews

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

Avatar for Aqua Knight Plumbing Co.
Aqua Knight Plumbing Co.
5.0(
16
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Mchenry, IL and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

With 24 years of experience we are dedicated to providing our clients with the very best in service, installation, and repairs for all phases of your plumbing needs. We specialize in a variety of residential and commercial services from water heater installations, sewer main installations, sump pump installations, repairs and so much more! We take pride in the attention to detail put into each of the projects \nwere involved with. Were known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction. \n \nAll Work Is Warrantied - Inquire Within \n \nMilitary Veteran and First Responders Discounts Available - Inquire Within \n \nDeposits May Be Required - Inquire Within \n \nAccepts Cash, Checks & Major Credit Cards \n \nFinancing Options Are Available - Inquire Within \n \n24/7 Emergency Services Available \n \naquaknightplumbing.com

New Sump Pit
Outside Clean Out
Outside Clean Out
March 2026
July Clog Log

+178

5 neighbors recently requested a quote
Recommended by31%of homeowners
Avatar for Toptec Heating, Cooling, Plumbing & Electrical, Inc.
Toptec Heating, Cooling, Plumbing & Electrical, Inc.
4.4(
615
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Mchenry, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1993

Free estimates

Emergency services offered

"I called Top Tec Oct 4 to check my existing water heater. Steve came out and looked it over and gave me the bad news. My 9 year old water heater was shot. The next day, Steve removed my old water heater and installed a new Rheem water heater. I could not be more pleased with how quickly the work was completed and with Steve’s expertise!"
Duct Cleaning Before/After
Additional Photos
Additional Photos
Barrington Geothermal Lake Heat Exchangers
Barrington Geothermal - WaterFurnace Geothermal Heating/Cooling Systems with Desuperheaters

+48

Response time1 day
Response rate100%
10 neighbors recently requested a quote
Avatar for Pinos Plumbing, Inc.
Pinos Plumbing, Inc.
4.5(
122
)
Water Heater - Install or ReplaceWater Heater - Install or Replace - For BusinessWater Heater - Repair or Service+1 more

Serving Mchenry, IL and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I was very pleased with all the work Joe did at my Mom's house and mine in Cary. At my Mom's he put in a new utility sink and repaired it and also repaired a significant leak downline from a toilet. When I saw the quality of his work I hired him to work at my house. There he removed and replaced a hot water heater and repaired a big leak in my utility sink and replaced the faucet. With the water heater he had to remove the black pipe to remove the heater then repipe after. After he was done both houses were cleaner in the areas he worked . I would hire him again if I need any plumbing done in the future."
Busted sewer
Busted sewer
Busted sewer
Install new water meter.
Install new water meter.

+10

Response time7 hrs
Response rate100%
14 neighbors recently requested a quote
Avatar for Aqua Doctor Plumbing
Aqua Doctor Plumbing
4.5(
111
)
Water Heater - Install or Replace

Serving Mchenry, IL and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Went great! They didn't charge us at all since all they had to do was tighten a bolt at the base of the toilet. Tenant contacted us saying that there was water leaking out of the base of the toilet, Aqua Doctors got out there the same day we called, determined it was just a loose bolt and not a wax ring issue, and tightened the bolt at no charge! Will definitely hire again."
Additional Photos
Additional Photos
Response time11 hrs
Recommended by87%of homeowners
Avatar for Mr. Rooter Plumbing Of Cook County
Mr. Rooter Plumbing Of Cook County
3.9(
42
)
Water Heater - Install or ReplaceWater Heater - Repair or Service

Serving Mchenry, IL and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"I coordinated the work with Mr. Rooter's home office. Unfortunately, they didn't relay to the technician that he needed certain materials to get the job done. This caused about a 60 minutes of extra time for the technician to search around for the part and then go pick it up. Other than that, the water heater gas control valve was successfully installed and I've got hot water again."
Response time8 hrs
Response rate99%
91 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

The amount of time it takes to replace an electric water heater will depend on the skill level of the individual who is replacing it. For example, if you replace it yourself–and you don’t have much experience–you can expect the project to take a full day. 

However, if you have a certified plumber or water heater contractor install your new water heater, it can take as little as 2 to 3 hours.

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.

Depending on the brand of water heater, you may need to install an expansion tank in order to meet the conditions for warranty coverage. It’s important for consumers to read the fine print of the warranty to see if an expansion tank is necessary. Even if an expansion tank isn’t required for the warranty, it’s usually mandated by building codes—although not for tankless water heaters.

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.

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.

The Mchenry, IL homeowners’ guide to water heater services

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