Say a pipe splits in your house tonight. Do you know, right now, without looking, where the main shutoff is? If your honest answer is “in the basement somewhere,” you’re in good company, but that answer doesn’t stop water.
That’s a bad time to start looking, because the water doesn’t wait while you move boxes around. Better to go find it today, when nothing is leaking.
Look by the water meter. The line from the street comes through the foundation there, and the valve is normally close by. Got an older Bergen or Hudson County house with a basement? Head for the front wall, the one closest to the street.
Where to look first
Main Water Shutoff Valve
| Your home | Check here |
| House with a basement | Wall facing the street, near the meter |
| Crawlspace | Near the access hatch, along the incoming line |
| Slab, no basement | Utility closet, garage, near the water heater |
| Condo or apartment | Under sinks, near the water heater, or ask the building |
| Outside | Curb box near the street, but that one’s for the water company |
Where is the main water shutoff valve in most homes?
Go find the water meter. Seriously, that’s the trick. The pipe running into the meter is your main. Put your hand on it and follow it back to the wall. Somewhere on that short run, you’ll find a wheel or a lever. Could be before the meter, it could be after it. Some houses have one on each side, too, which can be confusing the first time you go looking. Veolia’s frozen-pipe tips even call out valves on either side of the meter, so finding two is normal.
Slab house, no basement? Try the garage. Then the utility closet. Then the area around the water heater.
Finished basements are their own headache. Somebody puts up drywall and a drop ceiling, and the valve gets closed in behind a ceiling tile or a small access panel. So if the meter area is all finished over, start pushing up ceiling tiles near it and look for a little square door in the wall. Don’t start cutting.
Out by the sidewalk, there’s probably one more, under a small round metal lid. That’s the curb stop. Not yours to play with. That one and the meter belong to the water company’s crew.
What does the valve look like?
Round wheel or flat lever. That’s pretty much it.
The wheel is a gate valve, and you see a lot of them in older houses. Looks a bit like a tiny steering wheel bolted to the pipe, and you crank it clockwise until it won’t go any further. The lever is a ball valve. Way quicker. A quarter turn and you’re done, and you can tell where it’s at just by looking: lever lined up with the pipe means water’s on, lever sitting across the pipe means it’s off.
How do you test your main water shutoff valve?
Wait until nobody’s showering and the washing machine is quiet. Then head down to the lowest floor of the house and turn on a cold faucet, a laundry sink is perfect if you have one. Leave it running.
Now go close the main. Turn the wheel clockwise, a quarter turn on the lever. Walk back over to the faucet and watch it. The stream should fade off and stop within a minute or so. American Water’s cold-weather page has a nice way of putting it: if nothing comes out of any faucet, congratulations, you found your shutoff.
Then open the main back up. Slowly, please. Let that faucet sputter and spit air until it runs smoothly again, then turn it off. Snapping the valve open fast can send a shock through the lines and get the pipes knocking, which is the same thing we get into in Why Do Pipes Bang When You Turn Off a Faucet? Understanding Water Hammer.
And if the valve fights you? Don’t win that fight. American Water says a gate valve should turn easily and may need service if it doesn’t, and that matches what a stiff old valve tends to do when someone goes at it with a pipe wrench. The stem can snap. The packing nut can start dripping. Now you’ve got a leak at the one valve that’s supposed to stop leaks. If it won’t move by hand, or it closes and the faucet still trickles, leave it and give us a call.
Should you label the shutoff valve?
Yep. Tie a tag on it. American Water recommends hanging an ID tag on the valve so it’s easy to spot in a hurry, ideally before the cold weather shows up. Veolia goes one step further and says everyone in the house should know where it is and how to work it.
Everyone means everyone. Your spouse, the teenager, the in-laws who house-sit in February. Walk them down there once and show them which way it turns. And that shelf of paint cans parked in front of the valve? Move it.
What do you do when a pipe bursts?
Main off. Right away, before you grab towels or start moving furniture. New Jersey American Water’s winter tips say to shut the water off immediately if a pipe freezes or bursts, and not to try thawing a frozen pipe until the water is off.
Once it’s closed, open a faucet somewhere low in the house so the water left in the lines has somewhere to go. Then call us, or whoever your plumber is. When the repair’s done, don’t just crank the water back on. New Jersey American Water says to turn it on slowly and check for cracks and leaks, because a freeze can crack a pipe somewhere you can’t see yet.
Water on the basement floor? Check that the sump pump is keeping up. And if it seems to run nonstop even on dry days, that’s a separate problem, covered in Why Does My Sump Pump Keep Running Even When It Hasn’t Rained?
Frequently asked questions
Which way do I turn the main water shutoff?
A round wheel goes clockwise, all the way. A lever only needs a quarter turn, until it sits across the pipe.
My shutoff valve won’t turn. Can I use a wrench?
We’d skip the wrench. Forcing an old gate valve can break it or start a leak, so have a plumber service it or swap it out.
How do I know the valve is fully closed?
Leave a faucet running on the lowest floor. Once it stops completely, you’re closed.
Is the valve by the curb mine to use?
No. That’s the water company’s, same as the meter.
Can’t find your shutoff, or you found it and it won’t budge? Muccia Plumbing, Heating & AC has been serving North Jersey since 1978. We’re a master plumber, owned and operated, licensed, bonded and insured, and we answer emergency calls 24/7. Call 201-343-1414 or stop by 57 Orchard St in Hackensack. You can also look through our Plumbing Services and Water Heaters pages, see our Service Areas across Bergen, Hudson, Passaic, and Sussex County, or contact us online.
