Why is my water heater leaking?
Short answer
Leaks come from the supply connections, the temperature and pressure relief valve, the drain valve, or the tank itself. Fittings and valves are usually repairable; a tank leaking from its body means the unit needs replacement.
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Locate the source
- Top fittings → connection or flex line
- Discharge pipe from the T&P valve → excess pressure or temperature
- Bottom drain valve → worn valve
- Base of the tank with no other source → internal corrosion
What to shut off
- Close the cold inlet valve at the top of the heater.
- Turn off the breaker or set the gas control to off.
- Keep clear of scalding discharge water.
Related questions
Is a leaking T&P valve dangerous?
It's a safety device doing its job, but repeated discharge signals a real pressure or temperature problem that should be diagnosed promptly.
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