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TRUSTED BY OLNEY, MD HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon104
    Verified water heater services reviews

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

Avatar for Jimmy Gusky Heating & Air LLC
Jimmy Gusky Heating & Air LLC
4.3(
374
)
Water Heater - Repair or ServiceTankless Water Heater - InstallWater Heater - Repair or Service - For Business+6 more

Serving Olney, MD and surrounding areas

Approved

In business since 1996

Emergency services offered

Credit card accepted

"Jimmy Gusky HVAC is truly as good as it gets. One of our AC units went down and through the warranty company found our way to Jimmy Gusky himself. Although out of their territory, Jimmy was willing to make the extra trip to diagnose the problem. He was very responsive to get our initial service call scheduled and determined the unit needed to be replaced, and we all know these units usually decide to break down only when pushed to the limit in the hottest summer months and we need AC the most. He did the legwork to get the warranty company to honor the recommendation and as you can see from the attached photo put in a much more substantial unit that is doing a fabulous job cooling the home. Add to that he actually had the unit and scheduled the install even before the warranty company approved the swap out. I that isn't one of the greatest examples of outstanding customer service and going above and beyond to exceed expectations, I don't know what is. Big thanks to Jimmy and team for their commitment to excellence!"
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
4 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Fred and Son Plumbing
Fred and Son Plumbing
4.8(
68
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Olney, MD and surrounding areas

Approved

In business since 1990

Free estimates

Customers say: True professional

"Fred was responsive (same day), courteous and professional, got to work immediately and was quick and efficient.  He gave me thoughtful advice as well regarding getting maximum life out of my appliances-I solicited him on replacing my water heater vs the other way around.  Pricing was very reasonable.  Highly recommend.
"
Recommended by100%of homeowners
Avatar for Pipeworks Plumbing, Heating, and Air
Pipeworks Plumbing, Heating, and Air
4.8(
622
)
Water Heater - Repair or Service

Serving Olney, MD and surrounding areas

Approved

In business since 2016

Emergency services offered

Small jobs welcome

"Johnny was very professional in performance of the hot water heater installation and helpful in answering all of my questions. Highly recommend the company. Cheers"
Lennox 14ACX (Photo 1)
Lennox XC16
Trane Heat Pump 5
Its the details that count
Lennox 14ACX (Photo 2)

+66

Response time2 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for GAC Services
GAC Services
4.7(
295
)
Tankless Water Heater - InstallTankless Water Heater - RepairWater Heater - Install or Replace+1 more

Serving Olney, MD and surrounding areas

Approved (Corporate)

In business since 1970

Free estimates

Warranties offered

"Great company. We have used them for over 20 years and they have always performed well.  Recently, we installed carpet in our basement and this made the A/C condensation pipe too short.  We did not notice the situation at first but found out later that the water had soaked that area of carpet.  We went into a panic and called GAC.  They sent a tech out right away and solved the draining problem.  Always prompt and professional, one of best contractors that we have ever used."
Additional Photos
6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Beacon Home Services, Inc.
Beacon Home Services, Inc.
4.6(
2,093
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Repair+2 more

Serving Olney, MD and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Jamie our plumber arrived right on time & very efficiently performed three jobs for us. These included replacing a kitchen disposal, installing a vanity water faucet, flushing the water heater. He patiently explained each task and stayed until all were completed. We were so pleased we've entered into a service contract with Beacon Home Services."
Beacon Home Services - Electric, Plumbing, Drains
New water heater replacement
Our Team
Electrician - Installing 2 new electrical panels
Beacon Home Services - Electrician

+31

Response time30 mins
Response rate100%
578 neighbors recently requested a quote
Avatar for Supreme Service Today
Supreme Service Today
4.4(
479
)
Water Heater - Repair or ServiceTankless Water Heater - Repair

Serving Olney, MD and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"They were up front with what is wrong. Provided explanation of the quote. Asked permission to get access to places. They explain the reasoning for the cost and the risks if ignored. Pricing was fair. Went above an beyond to solve the water heater issue we had. Even calling in an electrician to help with a fix. They were on-time to early on their scheduled appointments. Excellent customer service."
Response time9 hrs
Response rate100%
88 neighbors recently requested a quote
Markool Heating & Cooling, LLC
4.7(
18
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+5 more

Serving Olney, MD and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Woke up this morning to my hvac leaking and contacted Markool. I have never used them before and was in a pinch. They fit me right in this morning and were out at my house within 2 hours. The tech stepped in the door and placed covers for his shoes so he did not track in any dirt which was impressive! The tech was very professional and super friendly. Problem was diagnosed and FIXED within an hour. The price was extremely reasonable to the point I was shocked in a good way (expecting a higher price). Anyways, I will most certainly be a returning customer. Thank you Markool Heating Cooling Plumbing."
Response time1 day
15 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Atlantic Blue Water Services
Atlantic Blue Water Services
4.8(
125
)
Water Heater - Install or Replace

Serving Olney, MD and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"On time, in fact earlier than expected. Courteous technicians. Provided options for repair or replacement and was forthcoming about what he saw. Recommended a highly reviewed water heater. All around excellent."
The Fleet
The Building on Rt. 140
Main water line replacement!
Well Pump Replacement
Training Session!

+22

Response time10 hrs
Response rate88%
88 neighbors recently requested a quote
Avatar for McCarthy Services MD
McCarthy Services MD
4.2(
385
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Olney, MD and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Emergency services offered

"Mr. Brian Langford made all the arrangements with the installation of our gas hot water heater from Lowe's via McCarthy plumbing. He was extremely helpful,patient, professional and available to answer all questions. Due to his approach to his work, we will be working with both companies in the future. Only concern I have is the warranty between Lowe's and AO Smith Hot water heaters. Once the heater is installed, Lowe's severs ties. If there is a problem with the hot water heater, you cannot return it to Lowe's although it was purchased through them, this is clearly stated on the Hot water heater in bold writing."
Installing a new A/C system.
Recommended by87%of homeowners
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Water Heaters FAQs, answered by experts

No, you’ll need to drain the tank before changing a water heater element, as the water heater element sticks through the side of the tank and uses a gasket to prevent water from pouring out. However, you don’t always need to drain it completely. If you’re only replacing the upper heating element, you can drain the tank until the water line is below the element. If you’re replacing the lower element, you’ll need to drain the whole thing.

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.

Yes, a water heater can be replaced in a day and can take between two and three hours to install from start to finish. Even if you encounter extra tasks that need to be completed, the job can still be completed in one day.

No. Expansion tanks must be installed on the supply side (where heated water flows out) of the boiler. There’s also a list of other requirements for most boilers, including being above the pressure relief valves, being on the inner side of any circulator, and more. Your installation manual should have more information on expansion tank installation requirements and what sort of tank the system is made for.

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.

The Olney, MD homeowners’ guide to water heater services

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