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Water Won't Stop: What Do I Do First?

Shut off the main water valve, switch off electricity to wet areas only if it's safe, turn off the water heater, open the lowest tap to drain the lines, and send an urgent request.

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Find the main shut-off

Basement or crawl space wall where the pipe enters, or the meter box near the street. Turn a wheel clockwise or a lever a quarter turn.

Diagram: the two common kinds of main water shut-off valve, gate and ball, in the open and closed positions.
Diagram: gate valves have a round wheel; ball valves have a lever that's closed when it crosses the pipe.

Electricity

If water is near outlets, the panel or appliances, don't touch them. Switch off those breakers only if you can stand somewhere dry.

Water heater

With the water off, turn a gas heater to pilot or an electric heater's breaker off so it doesn't heat an empty tank.

Drain the lines

Open the lowest faucet in the house to let the water in the pipes run out, which reduces pressure on the break.

Limit the damage

Move valuables, take photos for insurance, and start mopping. Wet drywall and carpet can grow mold within a couple of days.

Get help

Send an urgent request and say what broke, where, and that the main is off. See emergency plumbing.

What should I tell my insurer?

When it started, what failed, what got wet, and the photos you took. Keep the broken part if the plumber removes it, plus the plumber's written report and receipt. Call early, since many policies expect prompt reporting.

How do I stop it happening again?

Ask the plumber why the pipe failed. Freezing, old galvanized pipe, high water pressure or a failed supply hose each have a different fix, and the right one can stop a repeat.

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