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Repair guide · Easy · 5 minutes

How to Shut Off Your Water in an Emergency

A burst supply line can put hundreds of gallons on your floor before a plumber can get there. The valve that stops it takes seconds to close, if you already know where it is. Here is how to find your shutoffs today, and what to do in the first five minutes of a leak.

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How to Shut Off Your Water in an Emergency

Water near outlets or the electrical panel? Stay out of standing water that could reach anything plugged in. If you can reach the breaker panel from a dry spot, shut off power to the flooded area first. If you cannot reach it without stepping in water, stay out and call SDG&E at 1-800-411-7343, then call us.

What You Need

Know These Valves Before You Need Them

A main water shutoff on the pipe rising from the ground at the front of a house
The main shutoff, at the front wall
Turning an angle stop valve under a bathroom sink
Fixture shutoffs, under sinks and toilets
An open water meter box with the leak indicator dial
The meter box, near the curb

The Fix, Step by Step

  1. Find the main shutoff now

    Most San Diego County homes are built on a slab, so the main valve is outside: on the pipe that comes up out of the ground along the front or side wall facing the street, usually near a hose bib. Older homes sometimes have it in the garage. In a condo, check the utility closet or ask your HOA, because some buildings share one valve. Tag it so anyone in the house can find it.

  2. Close the valve nearest the leak

    If the leak is at one toilet, sink, or appliance, turn the small oval handle under or behind it clockwise until it stops. That keeps water on for the rest of the house. For a leak on the hot side, close the cold inlet valve on top of the water heater.

  3. Shut the main if you cannot isolate it

    A lever handle is a ball valve: a quarter turn so the lever sits across the pipe closes it. A round wheel is a gate valve: turn it clockwise until snug, and stop there. Old gate valves can snap if forced, which turns a leak into a geyser.

  4. Drain the pressure and confirm

    Open the lowest faucet in the house, usually an outside hose bib, to empty the lines. Then check the meter box near the curb: if the small red triangle on the dial has stopped spinning, the water is off. If it is still moving, something is open or the leak is between the meter and the house.

Stop and call us if: the main valve will not turn or starts leaking at the stem when you try, you cannot find a main valve at all, or the meter keeps spinning with every valve in the house closed, which points to a leak underground or under the slab. If water is coming from the street side of the meter, that pipe belongs to your water agency; call the 24-hour number on your water bill. A seized or leaking gate valve is worth replacing with a quarter-turn ball valve before the next emergency, and it is a short job.

Water is off and you need a plumber?

Call and describe it. We will tell you what it likely is, what it usually involves, and how soon we can be there.

Related Guides & Services

What Customers Say About Paws Plumbing

Verified Google reviews from San Diego homeowners.

ThistlefinchPosted on Google
Five stars

"Plumbing issues are always stressful. Jonathan and Billy replaced our shower valve and made light work of it. What a pleasant experience opening our home to them."

Nicholas BrunoPosted on Google
Five stars

"I've used Paws for multiple things in the condo, from kitchen problems to two toilet installations. By far one of the most honest and up front companies I've used, and the only people I will use for all things plumbing related."

Dominique O'BrienPosted on Google
Five stars

"I love these guys. They always go the extra mile to make sure the repairs are done right but also quickly."

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