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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
)
Tankless Water Heater - InstallWater Heater - Install or ReplaceWater Heater - Repair or Service+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

"Quick and professional. We have lived in the Washington, DC area for over 40 years and at last we have found a great plumber! Fred is highly skilled, explains everything before starting work, and quotes the price, so no surprises. He is very responsive and and comes quickly, even on a Saturday. A few months ago, we had a sudden leak in one of our toilets. It was afternoon when I called Fred, but he was able to fix it the same day. I highly recommend Fred and am happy to have found a great plumber."
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 Beacon Home Services, Inc.
Beacon Home Services, Inc.
4.6(
2,092
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+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%
572 neighbors recently requested a quote
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

"Since I can do electrical and carpentry, I handled some of the work myself. GAC suggested what needed to be done, and reduced their price accordingly for the work I did. The rest was done professionally and effectively, and I have a good heating and cooling system now."
Additional Photos
6 neighbors recently requested a quote
Recommended by93%of homeowners
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%
79 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(
124
)
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%
74 neighbors recently requested a quote
Avatar for Pohlman Plumbing Inc
Pohlman Plumbing Inc
4.4(
42
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Olney, MD and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Hired Pohlman to evaluate two natural gas tank water heaters in our home, one of which was unoperational. They suggested combi-boiler for our home in lieu of two tank water heaters. They did a great job and we are very pleased. Customer service is top notch, and I highly recommend Pohlman Plumbing."
Finished Shower
Finished Shower
Panoramic View
Vanity
Mid-replacement

+10

Response time8 hrs
Response rate97%
Recommended by86%of homeowners
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Water Heaters FAQs, answered by experts

Yes, you can convert a gas water heater to an electric one, but it is a complex process. You will need to ensure there is adequate power for the new electric unit, as they require more power than gas models. The project also involves safely closing off the gas lines and ventilation, and some cities may require a permit for the conversion. The cost can range from $1,500 to $4,100, depending on the installation scope, plumbing and electrical work, and the water heater model. For an accurate quote, it's best to contact a local professional. Also, be aware that your monthly utility bills may increase after the conversion, as natural gas is typically cheaper than electricity.

Not all types of water heaters require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation.

Unless you have previous plumbing experience or extensive experience with water heaters, you should avoid replacing your electric water heater yourself. This process involves disconnecting wiring and parts from the old water heater and reinstalling them onto the new one, among other difficult tasks. This job is best left to the pros to make sure that everything is connected correctly to avoid serious leaks or malfunctions.

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.

Often, the first issue you might encounter is a lack or loss of power—this could be caused by a tripped switch or a failed heating element. If your hot water is not producing enough power and its size is not the issue, you might need to replace one of its heating elements. A leaking water heater could be caused by tank erosion.

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.