How to Shut Off Your Water Heater in an Emergency (Gas and Electric)
When a water heater lets go, panic wastes the minutes that matter. This is the exact sequence to follow. Read it now, while you're calm — and consider taping the key steps to the wall near your heater.
Step 1: Stop the water (both types)
Find the cold-water shutoff valve on the pipe entering the top of the heater (usually the right-side pipe). Turn it clockwise until it stops. This halts new water feeding the leak. If that valve is stuck or missing, shut off the main house valve instead — know where it is before you need it.
Step 2: Kill the heat source
Gas: find the gas shutoff valve on the gas line near the heater (a lever handle — turn it perpendicular to the pipe) and turn the gas control knob to OFF or PILOT. Electric: go to your breaker panel and switch off the breaker labeled for the water heater. Don't skip this — a dry-firing electric element burns out in seconds, and a gas burner heating an emptying tank is dangerous.
Step 3: Relieve pressure (carefully)
If water is spraying, you can attach a hose to the drain valve and run it to a floor drain, then open the valve to relieve pressure and drain the tank in a controlled way. Caution: the water may be scalding. And never open the T&P valve as a drain — it's a safety device, not a faucet.
Step 4: Power down nearby electrics
If water is spreading across the floor toward outlets, appliances, or the furnace, kill those breakers too. Water and electricity are the combination that turns a plumbing emergency into something worse.
Step 5: Call and contain
Call (833) 713-2101 — tell us it's an active leak, whether it's gas or electric, and what you've shut off. While waiting, move valuables, lay towels to channel water toward drains, and take photos for insurance. Don't try to repair anything yourself in the moment; stabilization is the goal.
After the emergency: the 24-hour checklist
Once we've stopped the leak: run fans and a dehumidifier on any wet areas (mold starts in 24-48 hours), don't use the heater until it's been serviced, and keep those photos organized for your insurance claim. We'll walk you through repair-vs-replace with the unit in front of us.
Creating a Household Emergency Plan
Don't wait for a leak to figure out your shutoff locations. Walk through your home today and identify: the water heater's cold water shutoff valve, your home's main water shutoff, the gas shutoff valve (if applicable), and the water heater's power breaker or gas control. Label each with a tag or piece of tape so anyone in the household can find them quickly.
Show every adult in the home how to operate these valves. Valves that haven't been turned in years can be stiff — exercise them annually by turning them off and on to prevent seizing. If a valve won't budge or starts leaking when operated, have it replaced before an emergency strikes.
Keep a basic emergency kit near the water heater: old towels, a bucket, a flashlight, and the phone number of a 24/7 plumber. In a panic, having supplies within reach saves critical minutes.
What NOT to Do During a Water Heater Emergency
Don't ignore a small leak hoping it will stop on its own — it won't. Water heater leaks only get worse. Don't attempt to repair a leaking tank with sealants, epoxy, or patches; these are temporary at best and can mask a dangerous condition. Don't restart a water heater that has been flooded or has a suspected gas leak — call a professional first.
Don't touch electrical components if there's standing water around the unit. Water and electricity are a lethal combination. If the area is flooded, turn off power at the breaker panel (not at the unit) before approaching. When in doubt, stay clear and call for help.
After the Emergency: Next Steps
Once the immediate crisis is controlled, document the damage with photos for insurance purposes. Contact your homeowner's insurance to start a claim if there's significant water damage. Then call a licensed plumber to assess whether the water heater can be repaired or needs replacement. If the unit is over 10 years old and the tank itself is compromised, replacement is usually more cost-effective than repair.
Frequently Asked Questions
How urgent is this issue?
Any water heater problem involving leaks, unusual sounds, or inconsistent hot water warrants prompt attention. Small issues become major failures if ignored. When in doubt, have a professional assess the situation.
Can I fix this myself or should I call a professional?
Basic maintenance like flushing and visual inspections are DIY-friendly. Repairs involving gas, 240-volt electricity, or the tank itself should be left to licensed professionals for safety and code compliance.
How can I prevent this problem in the future?
Annual professional maintenance, regular DIY inspections, prompt attention to minor issues, and following manufacturer recommendations are the best prevention. Keep records of all maintenance performed.