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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon63
    Verified water heater services reviews

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

Avatar for David Drain and Sewer
David Drain and Sewer
4.4(
135
)
Water Heater - Install or ReplaceWater Heater - Install or Replace - For BusinessWater Heater - Repair or Service

Serving Ossining, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Emergency services offered

Warranties offered

"Was able to come the same day. He picked up and installed a new gas hot water heater and the Installation costs were very reasonable. Would highly recommend. He even called after the installation to make sure I was getting hot water and there were no leaks."
Recent Work
Recent Work
Recent Work
Recent Work
Recent Work

+10

Response time4 hrs
Response rate99%
Recommended by64%of homeowners
Avatar for Aldos plumbing
Aldos plumbing
5.0(
35
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Ossining, NY and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"When we realized our water heater was leaking, Aldo's was fast both to respond to the inquiry and to get us a replacement; within 36 hours, we were back to having hot water with a new tankless setup. Pricing was within the range we expected and the team was very communicative; I'd hire Aldo's plumbing again!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+41

1 neighbors recently requested a quote
Recommended by44%of homeowners
Avatar for NY Connect Plumbing & Heating
NY Connect Plumbing & Heating
4.6(
50
)
Water Heater - Install or ReplaceWater Heater - Install or Replace - For Business

Serving Ossining, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Edwin followed up quickly and set accurate expectations regarding his arrival time and project cost. Despite being challenged by an old, rusted infrastructure, he maintained a positive, can-do attitude. The work was completed in a professional manner; cleanup was complete. We have already identified opportunities for future engagement."
Weil Mclean ultra 550
Navien Combi Boiler Install
Foxwoods
Foxwoods
Response time10 hrs
1 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Cassidy Plumbing and Heating, Inc
Cassidy Plumbing and Heating, Inc
4.5(
32
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Ossining, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1992

Emergency services offered

Warranties offered

"Anji recommended four plumbers. Cassidy was the first to respond on Friday afternoon. One other plumber responded but I could not understand his heavy accent, and he asked me if I wanted him to replace the whole burner assembly. That made no sense to me and I questioned him about it. Suddenly he became "too busy" and hung up the phone. Another plumber didn't respond until Monday morning. Too late. The fourth plumber never responded at all. Cassidy asked if it was an emergency or could wait until Monday. I said Monday. and asked what time? I did not get an answer on Friday. Around 8:30P I called and got an answering service which told me that I wouldn't get a response until Monday because their office closed at 8:00P. I had asked about what time on Monday before 6:00P George arrived Monday morning. He was friendly. He knew what he was doing. He replaced the thermocouple. All work was done neatly and professionally. We have hot water again. I'd use Cassidy again."
Heating System
Heating System
Plumbing
The Team
Navien Water Heater

+3

Response time2 days
Response rate100%
8 neighbors recently requested a quote
Affordable Heating & Cooling of NY Inc.
4.3(
53
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Install - For Business+5 more

Serving Ossining, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Dave saved us money and got the job done. Another company diagnosed the problem incorrectly and recommended changing a more expensive part that wouldn't have solved the problem. Dave did his own thorough assessment, found the real issue and fixed it right away. Couldn't be more grateful for heat and hot water. Thank you Dave."
Response time4 hrs
Response rate86%
10 neighbors recently requested a quote
Charles Mechanical
5.0(
37
)
Water Heater - Install or ReplaceTankless Water Heater - InstallTankless Water Heater - Install - For Business+5 more

Serving Ossining, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Credit card accepted

Offers commercial services

"I can do all the basics on my boiler. But he's the only one who showed app on time. Completed the job and I'm happy as health. I will recommend him to everybody. I'm a harbor flowing contractor any time. I can pass some business. Don't get this young man, I'm going to do it. Thank you , thank you , thank you"
Response time10 hrs
Response rate93%
7 neighbors recently requested a quote
Scarps Plumbing
4.8(
26
)
Water Heater - Install or ReplaceWater Heater - Repair or ServiceTankless Water Heater - Install+3 more

Serving Ossining, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"I recently had Nick out to fix my oil burner, and I couldn’t be happier with the experience. My heating system suddenly stopped working properly during a cold snap, leaving us without heat. From the first call, the team was responsive, professional, and got someone out quickly. Nick arrived on time, was polite, knowledgeable, and took the time to thoroughly diagnose the issue. He explained everything clearly, what was wrong, why it happened, and what needed to be done without any upsell pressure or confusing language. The repair was done efficiently and cleanly; he left the area spotless, which I really appreciated. My oil burner is now running better than ever. Heat is consistent, and I feel much more confident going into the rest of the cold weather. Honest, skilled work at a fair price."
22 neighbors recently requested a quote
Recommended by62%of homeowners
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Water Heaters FAQs, answered by experts

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.

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

Water heater installation code requirements are in place to keep your family and home safe. Water heaters that are installed wrong can simply not work. However, that's an, if you're lucky, type of situation. More commonly, incorrectly installed water heaters pose a real threat from carbon monoxide poisoning, gas leaks, water leaks, and even explosions. 

The time it takes to install or replace a water heater depends on the type of heater and the complexity of the job. A professional can typically replace a standard tank-style water heater in one to three hours. However, if the work area is tight, such as a small closet or crawl space, the job could take four to five hours. Replacing an existing tankless unit takes about two to three hours, while upgrading from a tank-style to a tankless water heater is more complex and can take four to six hours. The project will take longer if you are switching fuel sources, such as installing a gas heater which can add about an hour to the timeline, or if the unit needs to be relocated.

If you want instant hot water and to reduce water waste while improving convenience, a hot water recirculating system is worth it, especially if you find your hot water heater is not hot enough. These systems can save thousands of gallons of water each year so you don't have to wait for hot water at faucets and showers. The upfront investment can be high, especially for systems requiring additional plumbing, but the long-term savings on water bills and added comfort make them a worthwhile upgrade.

The Ossining, NY homeowners’ guide to water heater services

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