Electric Water Heater Leaking at the Bottom Element
On this page (5 sections)
The Short Answer: Water around the lower element cover usually comes from the element’s gasket or threads, which is a repairable part. It can also come from the tank itself, near the element, which isn’t repairable. Turn off the breaker first, because the element terminals sit behind that cover. A technician then confirms whether the leak is at the element flange or from the tank.
Make it safe
- Turn off the water heater’s breaker from a dry spot. Don’t touch the heater while standing in water.
- Close the cold-water inlet on top of the heater if water is actively running.
- Leave the access cover on. Water in the compartment with the thermostat and element terminals is an electrical hazard.
Element gasket or tank?
| What you notice | Points to | Outcome |
|---|---|---|
| Water or white mineral crust coming from the edge of the cover, other fittings dry | Element gasket or threads | Element and gasket replaced |
| The leak started soon after an element was replaced | Gasket not seated or element not tightened correctly | Element refitted with a new gasket |
| Rust streaks below the cover, an older tank, rusty hot water | Corrosion at the tank opening or the tank wall | Often replacement |
| Water coming from the insulation all around the bottom, not just the cover | Tank | Replacement |
| Water only in the pan, under the drain valve or relief pipe | A different source | See why water leaks from the bottom of a water tank |
Before deciding, rule out water running down from above. Dry the top fittings, the relief valve pipe and the drain valve, then check which one gets wet first. Water from a top connection can run down inside the jacket and come out at the element cover.
What the repair involves
A technician isolates the power and confirms it’s off, then removes the cover and insulation. They look at where the water is coming from: the element’s gasket face, its threads, or the tank metal around the opening. If it’s the gasket, they lower the water level below the element, then replace the element and gasket together, since old gaskets rarely reseal. They refill the tank completely and purge the air before restoring power. Powering an element that isn’t covered by water burns it out. Any thermostat or wiring soaked by the leak is checked and replaced if it’s damaged.
If the tank opening is corroded or damaged, or the tank wall is weeping near the element, a new element won’t seal it. The heater needs replacing.
Repair or replace?
- Repair: gasket or element leak on a tank with a dry, sound body.
- Replace: water coming from the tank wall or insulation, a corroded or deformed element opening, or an older tank that also shows rust at the base or rusty water.
For other wet spots on electric tanks, see water heater gasket leak and water heater leaking from upper thermostat.
Frequently Asked Questions
Q: Can I just tighten the element to stop the leak? A: Reaching it means removing the electrical cover, and over-tightening can damage the gasket or the tank opening. Old, hardened gaskets usually need replacing, not tightening. Leave it to the technician.
Q: Can I keep using the heater until it’s fixed? A: Leave the breaker off while water is near the electrical compartment. You can usually keep cold water running to the rest of the house with the heater’s inlet closed. See can you still use water if the water heater is leaking.
Q: The element compartment was full of water. Is the element now bad? A: Not necessarily. But the thermostat, wiring and terminals may be corroded or damaged, and the technician should check them before power is restored.
Manuals and supporting references
These links distinguish general safety information from model-specific documentation. A manual directory helps you locate your unit’s instructions; it does not establish that every model uses the same parts, codes, or test values.
- A. O. Smith technical bulletin 51: puddles around a heater (opens in a new tab)Common water-leak sources and the distinction between fittings and a failed tank.
- A. O. Smith: standard electric no-hot-water diagnostic chart (opens in a new tab)Professional diagnostic context for standard electric storage heaters; not instructions to open or test your appliance.
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