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TRUSTED BY KEY BISCAYNE, FL HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon40
    Verified water heater services reviews

Top-Rated Water heater pros in Key Biscayne - Updated Nov 2026

Avatar for KNIGHTS PLUMBING LLC
KNIGHTS PLUMBING LLC
5.0(
4
)
Water Heater - Install or Replace - For Business

Serving Key Biscayne, FL and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"They were very responsive and honest. He called me and gave me honest feedback about what water heater would be best for my home, as well as price options. Did not feel pressured to make a quick decision. Once I agreed, they came the following day to asses and provide an invoice and the day after that the water heater was installed. Can tell a difference in the heating of the water immediately. Would definitely recommend"
Vanity Rough
Shower Valve
Response time20 mins
Response rate92%
1 neighbors recently requested a quote
Avatar for Joe Cole Plumbing
Joe Cole Plumbing
4.1(
40
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessWater Heater - Install or Replace+1 more

Serving Key Biscayne, FL and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"We hired Joe Cole Plumbing to replace our 12-year-old 80 gallon electric water heater. We went with a 80 gallon Rheem hybrid that Joe Cole Plumbing had to order for us. Joe Cole Plumbing installed the new hybrid water heater within two days of it arriving from the manufacturer. The install went smoothly and they took away our old water heater. We love the new hybrid water heater. After about six days of usage, we are averaging under 3kWh per day for heating the new 80 gallon tank (at 130 degrees) with the side benefit of the heat pump discharging cool air that cools our garage. Ask for Johnny when you call. We obtained other estimates and Johnny was very fair with his pricing."
Water Heater Install
Commercial Heater
Plumbing & Piping
1 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for I.H.M. Services, Corp.
I.H.M. Services, Corp.
4.4(
27
)
Tankless Water Heater - InstallTankless Water Heater - Install - For BusinessTankless Water Heater - Repair+5 more

Serving Key Biscayne, FL and surrounding areas

Approved

In business since 2014

Warranties offered

Small jobs welcome

"I hired IHM to install a water heater with permit. Everything was fine until the inspection, which they FAILED. Henry sent the same technician (Andre) that did the job instead of visiting the property himself. Andre, who obviously wasn't familiar with CODE, then said relayed to Henry that the water heater model I provided wouldn't work there and that I had to buy another water heater, AND that they would charge me a higher amount to go do the job again or I would have to submit a Change of Contractor to the city. Turns out the water heater DOES VERY WELL work there but their lack of knowledge has resulted in nothing but a waste of time. CROOKS!!"
LAVATORY
SHOWER FAUCET INSTALL
NEW LAVATORY CABINET WITH FAUCET
Response time3 hrs
1 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for GGR quality construction llc
GGR quality construction llc
5.0(
13
)
Water Heater - Repair or ServiceSolar Water Heater System - InstallTankless Water Heater - Install+6 more

Serving Key Biscayne, FL and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I highly recommend this plumbing company! They did an excellent job in my home — very professional, punctual, and respectful. The technician explained everything clearly, fixed the problem quickly, and left the area clean. Their prices were fair, and the quality of work was outstanding. I will definitely use their services again and recommend them to anyone who needs reliable plumbing work. Thank you for such great service! ⭐️🔧💧"
31 neighbors recently requested a quote
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Water Heaters FAQs, answered by experts

Your water heater's age can affect your homeowners' insurance policy. Many policies will ask how old the heater is when you first apply for a policy—and they may make you replace a model that's over 10 years old. 

Even if your policy permits you to have an older heater, it may significantly reduce the amount of protection available. If an older water heater suddenly leaks and causes damage to parts of your home, your policy may not cover it.

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.

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, hybrid water heaters can be noisy — noisier than traditional water heaters. The sound they produce is often compared to the hum of a dishwasher. Its noise comes from the heat pump’s fan and compressor as they work to pull in and compress the air. While it’s not totally disruptive, especially if the unit is installed in less frequented areas, like a basement or garage, it’s something to keep in mind if you’re sensitive to noise or if the unit will be placed near bedrooms or living spaces.

Most standard residential water heaters, which are typically around 40 gallons and use 240 volts and between 3,500 and 5,500 watts, require a 30-amp, two-pole circuit breaker. For smaller, point-of-use water heaters using 120 volts and between 1,500 and 3,000 watts, a 30-amp breaker is also often adequate. However, some models may have different needs; units that use more watts than average may require a 40-amp breaker, while smaller units might only need a 20-amp breaker. Newer, tankless, or more energy-efficient models can also require a higher amperage. Having the correct breaker size is crucial for safe and efficient operation, so it's best to consult a licensed electrician to determine the specific needs of your water heater.

The Key Biscayne, FL homeowners’ guide to water heater services

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