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What to Do When Your Water Heater Leaks: Step-by-Step Emergency Plan

A leaking water heater at midnight is stressful. This calm, step-by-step plan tells you exactly what to shut off, what to move, and when to call.

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Technician repairing a corroded leaking water heater
Lowcountry humidity accelerates water heater corrosion — early detection saves tanks.

You found water spreading from your water heater. Take a breath — this is manageable if you work the steps in order. The goal in the first ten minutes is simple: stop new water from entering the tank, remove the energy source, and protect your home while help is on the way.

Step 1: Stop the water supply

Find the cold-water shutoff valve on the pipe entering the top of the heater and turn it clockwise until it stops. This halts the 40–80 psi feed that turns a weep into a flood. If the valve is seized — common on older Lowcountry installs — shut off the home's main instead and call us.

Step 2: Cut the energy source

For electric heaters, switch the dedicated breaker OFF at the panel. For gas, turn the gas control knob to PILOT or OFF. Never work around a leaking heater with power or gas still feeding it.

Step 3: Drain pressure safely

If water is actively flowing, attach a garden hose to the drain valve at the tank's base and run it to a floor drain or outside, then open the valve. Also open a hot-water tap somewhere in the house to let air in so the tank drains.

Step 4: Contain and protect

Move boxes, electronics, and anything absorbent away from the water. Lay towels to channel water toward a drain. In Goose Creek's humidity, start airflow immediately — a fan on the wet area fights the mold that loves our climate.

Step 5: Document, then call

Snap photos of the leak source, the water extent, and the heater's label (model/serial helps us bring parts). Then call (833) 713-2101 — describe what you see and what you have shut off, and we will guide the next steps.

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Prefer to read first? Browse our guides or contact us.

Frequently asked questions

Should I drain the whole tank myself?

Draining to relieve pressure is fine and helpful. A full drain-down can wait for the technician — partially drained is safer for you and preserves evidence of the leak source.

Is it safe to touch the water?

Standing water near electrical equipment is never assumed safe. Do not wade in or touch wet wiring; shut the breaker first, wear rubber-soled shoes, and keep clear of the heater's electrical compartment.

What if I smell gas?

Stop everything, leave the house, and call your gas utility or 911 from outside. Do not flip switches or use your phone indoors near the leak.

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