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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

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

An average-sized empty water heater weighs around 150 pounds. Tankless water heaters are much lighter, weighing between 10 and 50 pounds. The smaller size and added convenience come at a price, though—tankless water heaters average about twice the price of their traditional counterparts.

Going from a tank to a tankless water heater is one of the most effective ways to lower your utility bills. The switch also frees up more space and ensures a consistent hot water supply, as the water is heated on an as-needed basis. It costs between $5,400 and $7,400 to install a new tankless water heater. Most installation companies will also help dispose of your old water tank.

If your gas water heater is over 20 years old, it should be replaced. Gas water heaters can last up to 12 years and while they can exceed this expectancy if well-maintained, a heater that's 20 years old would require replacement. The heater is unlikely to run as efficiently as a new model and could be more expensive to do so.

In most municipalities, a license is not mandatory for water heater installation or replacement. However, we strongly recommend hiring a licensed plumber or water heater installer to handle the work. Licensed installers are far less likely to make a mistake during the installation, which means paying for the experience decreases your risk of a leak and other issues. You can use our state licensing tool to find out if a contractor you’re considering in your area holds a plumber’s license.

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.