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Plumbing
My water heater is leaking — what should I do?
A leaking water heater is serious. Here's how to identify where it's leaking from, what it means, and what to do right now.
Most common causes
- 01Leaking from bottom: internal tank failure (tank must be replaced)
- 02Leaking from top: loose inlet/outlet connections or pressure relief valve
- 03Leaking from drain valve: worn valve packing
- 04Leaking from side: failing pressure relief valve
What to do right now
1
Turn off the cold water supply valve at the top of the water heater2
For gas: turn the thermostat to 'Pilot'3
For electric: flip the water heater breaker in your panel4
Do not use hot water — it will pull cold water into the leaking tank5
Place towels or a bucket — do not leave water standing on wood floorsWhen to call a professional
A leaking tank water heater almost always requires replacement — call a plumber same day. A bottom leak means the tank has failed internally. Delaying causes water damage and mold.
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