Solar Water Boiler Leaking

Solar or Electric Water Heater Leaking? Here’s What You Need to Know.

If your water heater is leaking and looks corroded or rusty, you’re probably wondering what to do. This is a common issue with all kinds of systems – whether it’s a solar water heater, a standard electric heater, or a combination system with a separate pressure tank.

From what I’ve seen, once the tank itself starts leaking and shows visible rust on the outside, the problem is almost always on the inside. The metal tank has likely corroded through. I’ll show you the steps to diagnose the issue and what your options are.

Why a Leaking Tank Usually Can’t Be Fixed

Here’s the simple truth about a corroded, leaking tank:

• The leak starts from the inside out. The water constantly inside the tank causes the steel to rust over many years.
• You can’t seal it from the outside. Any patch or sealant is just a temporary bandage on a growing internal problem.
• The damage is permanent. By the time you see water and rust on the outside, the metal is often too weak to repair safely.

How to Diagnose Your Leaking Water Heater

Follow these steps to figure out what’s happening:

1. Find the exact leak source. Dry the tank completely with a towel.
2. Check all the connections. Look at the pipe fittings on top and the pressure relief valve. Sometimes a loose connection here can be tightened.
3. Look at the tank body. If the water is seeping directly from the tank’s metal shell, especially near the bottom or at corroded spots, the tank itself has failed.
4. Check the expansion tank. If you have a separate small tank (often near the main heater), check for corrosion or moisture at its base. These tanks often fail and need replacement.

Your Likely Solution: Replacement

For a tank leaking from its body, replacement is the most reliable and safe fix. A failed tank can suddenly burst, causing significant water damage.

Learn how to handle the replacement process:

• Call a professional plumber. This is the recommended route. They can safely disconnect the old unit, handle the disposal, and install a new, correctly sized heater.
• Consider an upgrade. If you’re replacing it, it’s a good time to look at more efficient models or consider if your current system type (solar, electric, hybrid) is still the best for your home.

What About the Expansion/Pressure Tank?

If the leak is only from the smaller expansion tank, the fix is easier. This component is designed to be replaced separately. A plumber can quickly swap it out for a new one, which is much less costly than replacing the main water heater.

In short, if your water heater tank is leaking through its own metal walls, it’s telling you it’s time for a new one. Don’t risk a major flood – getting it assessed by a pro is the best next step.