A leaking water heater can damage floors and walls fast. The first few minutes matter, and the source of the leak tells you whether a repair is possible.
Do This First
- Turn off the power (breaker for electric) or set the gas control to off.
- Close the cold water shutoff valve on top of the heater.
- Protect the area. Move items, mop standing water and use towels or a wet vac.
- Take photos if you may need to document damage for an insurance claim.
- Call a licensed plumber or water heater technician.
Where the Leak Comes From
- Fittings and connections: often fixable with tightening or new parts.
- Temperature and pressure relief valve: may be a bad valve or a sign of high pressure.
- Drain valve: a worn valve can be replaced.
- The tank itself: a leak from the bottom or body of the tank usually means internal corrosion, and the unit needs replacing.
Repair or Replace
If the leak is from a fitting or valve, repair is possible. If the tank has failed, replacement is the answer. Read how long water heaters last and what affects replacement cost.
If water has already spread, see our statewide resources, or request service in San Antonio or your city from the home page.
Frequently Asked Questions
Is a leaking water heater an emergency?
Yes, because it can cause water damage quickly. Shut off power or gas and the water supply, then call a professional.
Can a leaking water heater be repaired?
If the leak is from a fitting, valve or connection, often yes. A leaking tank usually needs replacement.
Why is my water heater leaking from the bottom?
It may be a drain valve, a fitting or a failed tank. Tank failure from corrosion is the most serious cause.
Should I turn off my water heater if it is leaking?
Yes. Turn off the power or gas first, then close the cold water supply valve.
Water Heater Leaking Right Now?
24/7 emergency service across Texas. Call and we will get a licensed technician to you.
Call (888) 492-0093 (24/7)This guide covers safe homeowner checks only. Gas, electrical, and pressurized-plumbing repairs should be performed by licensed professionals. When in doubt, call.