Water heater leaking in a condo closet? What to do first

In a lot of Miami condos, the water heater sits in a closet next to the air handler. Under it there is a drain pan, a slab and the ceiling of the unit below. When the tank starts to leak, the first few minutes matter most.

Stop the water first

Start with the valve on the cold water line at the top of the tank. Turn it clockwise until it stops. That cuts off new water to the heater, so the leak can only drain what is already inside.

If that valve is stuck or you can’t reach it, close the main valve for your unit. In many condos it is in the same closet, near the front door or under the kitchen sink.

Next, switch off the breaker for the water heater. An electric tank should not keep heating while it is losing water.

If water has already spread past the pan, let building management know. They can check the unit below and the shared walls.

Find where it’s coming from

Where the water comes from tells you a lot about the fix.

• Top of the tank. Water around the pipe connections usually means a loose fitting or a worn valve. These are often simple repairs.
• The relief valve on the side. This valve opens when temperature or pressure gets too high. A steady drip can mean the valve is worn, or that pressure in the line needs a look.
• The bottom or the seam of the tank. This is the tank itself. Once the steel inside has rusted through, it can’t be repaired.

Take a photo of what you see before you mop up. It helps us bring the right parts.

Repair or replace?

A leaking fitting on a tank that is only a few years old is worth repairing. A tank leaking from the bottom needs replacing, whatever its age.

Age matters for everything in between. Electric tanks past about 10 years old are usually near the end of their life, and a repair buys less time. The label on the side of the tank shows the manufacture date, or a serial number that includes it.

If you are replacing it, this is a good time to decide on size and type. Some owners switch to an electric tankless unit to free up the closet. It needs the right electrical supply, so we check the panel before recommending it.

Why the pan matters

The pan under the tank catches small leaks before they reach the floor. Its drain line carries that water away. If the pan is rusted or the drain is blocked, a slow leak can soak the slab without anyone seeing it.

When we replace a water heater, we check the pan and its drain as part of the job.

When to call

Call right away if water is past the pan, if it is showing up on the ceiling below or if the tank is leaking from the bottom. We answer 24 hours a day, including holidays, at (786) 269-3783.