Shut off your main water in 30 seconds.
A burst pipe can dump gallons a minute. The difference between a mop-up and a disaster is knowing where your main shutoff is before the water starts. Find it today — this takes five minutes on a calm Saturday, not during a leak.
What you'll need
Five minutes and:
- A flashlight — valves hide in dark corners
- Work gloves — ground boxes are grimy
- A tag or zip tie — mark it so anyone can find it
- Five calm minutes — do it now, not during a leak
3 steps, 5 minutes.
Do this once on a quiet Saturday and you'll never panic during a leak.
Find it
Check three places, in this order. Outside front wall — near the hose bib, where the line comes out of the house. Ground box by the sidewalk or street — lift the lid (it's often marked "water"); the valve is inside. Inside — garage, utility closet, or the wall facing the street where the line enters. One of the three will have it.
Identify the valve
Round wheel means a gate valve: turn it clockwise — righty-tighty — several full turns until it stops. Lever handle means a ball valve: quarter-turn it so the handle sits perpendicular (across) the pipe — that's off. Handle parallel to the pipe means on. Remember: across is off.
Test it and tag it
Turn it off, then open a faucet — the water should slow to a stop. Turn the valve back on. Now tag it (a luggage tag or zip tie works) and tell everyone in the house where it is and which way is off. A shutoff nobody else can find is barely a shutoff at all.
If it's stuck, don't be a hero.
Forcing a corroded valve is how a $200 valve replacement becomes a flood.
Forcing it breaks it
Old gate valves seize from years of disuse. If the wheel won't turn with firm hand pressure — or the lever won't budge — stop. Forcing it snaps the stem, and then you have no shutoff and a leak. That's a valve replacement call, and it's cheap insurance compared to a flood.
Every fixture has its own shutoff
Toilets, sinks, and washing machines each have little shutoff valves underneath or behind them. For one fixture's leak, you don't need the main — just turn that fixture's valve clockwise. Your water heater has its own too: the cold-water shutoff on top of the tank.
Worn-out valves lie
Sometimes the wheel turns freely but the water keeps flowing — the gate inside has worn away or broken off its stem. The valve looks fine and does nothing. Same fix: replace it now, on your schedule, not at 2 AM during a burst pipe.
When to call a plumber.
The valve is your first line of defense — make sure it works:
Valve is stuck or corroded
Don't wait for the emergency to discover it. A main shutoff replacement is a small, flat-rate job — and it's the cheapest flood insurance you'll ever buy.
It spins but water keeps flowing
A worn-out gate valve gives you false confidence. If your test in step 3 didn't stop the water, the valve needs replacing before you actually need it.
No accessible shutoff at all
Some older homes have no homeowner shutoff — only the city's curb valve. We can install an accessible main shutoff, and while we're at it, check the main water line itself.
Main water valve FAQ
Straight answers, no sales pitch.
Which way do I turn the valve to shut off the water?
Righty-tighty: clockwise for a round gate-wheel valve, several full turns until it stops. For a lever-style ball valve, quarter-turn it so the handle sits perpendicular — across — the pipe. That's off. Handle parallel to the pipe means on.
What if I can't find my main water shutoff?
Check the ground-level box near the sidewalk or street — lift the lid, it's often marked "water." Some older homes genuinely have no accessible main shutoff, only the city's curb valve. If that's you, call us at (818) 669-9019 — installing one is a small job and cheap insurance.
Should I shut off the water when I go on vacation?
For trips longer than a few days, yes — it's the cheapest flood insurance there is. Turn the water heater to vacation or pilot mode too, so it isn't heating an empty tank while you're gone.
The valve drips when I turn it — is that bad?
Usually it's just the packing nut under the handle working loose with age. Try gently snugging that nut — the nut, not the valve itself. If it keeps dripping, or the valve won't fully stop the water, it's worn out and needs replacing before you need it in a real emergency.
Valve stuck? Don't force it.
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