How to Safely Shut Off Your Water Heater in an Emergency
Shutting Off the Water Supply
Locate the cold water supply valve at the top of the unit and turn it clockwise to shut off incoming water. This is the first step for an actively leaking tank.
Shutting Off Power or Gas
For electric units, switch off the dedicated breaker for the water heater at your home’s electrical panel.
For gas units, turn the gas control valve on the unit itself to the "off" position — do not use the main gas shut-off for the whole house unless instructed to by your gas utility during an actual leak.
After Shutting Off
Once water, and power or gas, are shut off, call for emergency service. Move any nearby belongings away from standing water to limit additional damage while you wait.
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Frequently Asked Questions
Do I need to drain the tank myself before a specialist arrives?
Not necessarily — shutting off the water and power/gas supply is usually sufficient. A specialist can advise on draining if needed for your specific situation.
What if I can’t locate the shut-off valve?
If you’re unsure or the valve is inaccessible, shutting off your home’s main water supply valve is an acceptable temporary measure while waiting for professional help.
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