Water Heater Leaking? What to Do First
Immediate Steps
If safe to do so, shut off the water supply valve at the top of the unit to stop the leak from worsening, then cut power at the breaker (electric units) or turn the gas supply valve to off (gas units).
Move any nearby belongings away from the affected area to prevent additional water damage while you wait for service.
Identifying the Source
A leak from a fitting, valve, or connection is often repairable. A leak from the tank itself — typically visible as rust or corrosion at the seams — usually means the tank has failed and needs full replacement.
When It’s an Emergency
Active, ongoing leaking that is pooling on the floor is a genuine plumbing emergency — this is the kind of situation where same-day emergency response matters most to limit water damage.
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Frequently Asked Questions
How can I tell if the leak is from the tank or a fitting?
Dry off the unit and surrounding area, then check again after a short time — moisture reappearing at a specific fitting or valve suggests a repairable leak, while moisture along the tank body itself suggests tank failure.
Is a small amount of water around my water heater always an emergency?
Not always — condensation can sometimes be mistaken for a leak, especially with a change in temperature. But any leak that is actively growing or pooling should be treated urgently.
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