Serving Montclair & the Inland Empire
Licensed & Insured Honest. Reliable. Local.
Sweetwater Plumbing 💬 Text us ☎ (909) 312-4516

How to shut off
water to your house.

When a pipe bursts or a major leak happens, every minute matters. Knowing where your main water shut-off is and how to use it can save you thousands in damage. Find yours now, before you need it. We put this guide together to help, and if you can't find your shut-off or it won't turn, we are always just a call away.

Short answer

Where is the main water shut-off valve in Inland Empire homes?

Most Inland Empire homes have the main shut-off outside on the wall closest to the street or in the garage along the front wall. If you can't find it, the water provider's valve in the meter box at the curb also shuts off the house. For a ball valve (lever handle), turn the lever a quarter turn so it sits crosswise to the pipe. For an older gate valve (round wheel handle), turn it clockwise until it stops. Test it once a year; gate valves in particular seize after long periods unused. Every member of the household should know where this is before there's an emergency.

Find your shut-off

Where to look for your main water shut-off

The main water shut-off is usually in one of these locations:

  • Outside near the front of the house: usually a valve on the pipe that comes up out of the ground near the front hose bib, often next to the pressure regulator
  • In a curbside meter box: the water provider’s valve at the property line, a backup if you can’t find your own; it needs a water meter key
  • In the garage: wall-mounted ball valve or gate valve, often near where the water line enters
  • In a utility closet: newer homes, sometimes near the water heater
  • In a crawlspace: older homes, where the line first enters the structure

Right now (not in a pinch): walk around your house and locate it. Take a photo. Show family members. Make sure it actually turns. Many shut-offs corrode in place and don't work when you need them. If yours is stuck or leaks, call (909) 312-4516 or text (909) 247-6791; we'll go over your options for replacing it.

Step by step

How do I shut off the main water valve?

  1. Go to the main shut-off: Use the list above to find it.
  2. Close the valve: Lever handle (ball valve): turn it a quarter turn so it sits crosswise to the pipe. Round wheel (gate valve): turn it clockwise until it stops. Don't force a stuck gate valve with a wrench; old ones can break.
  3. Confirm the water is off: Open a faucet inside to make sure the water has stopped and to drain pressure from the pipes.
  4. If it won't close: In an emergency, close the valve at the meter with a water meter key. It belongs to your water provider, so turn it gently and don't force it. Then call us.
  5. Turn it back on slowly: After the repair, open the valve slowly with a faucet open to let air out of the pipes.
Service Area

Serving 24 cities across the Inland Empire.

Chino · Chino Hills · Claremont · Colton · Corona · Diamond Bar · Eastvale · Fontana · Grand Terrace · Highland · La Verne · Loma Linda · Mira Loma · Montclair · Norco · Ontario · Pomona · Rancho Cucamonga · Redlands · Rialto · Riverside · San Bernardino · San Dimas · Upland

Common Questions

Frequently asked questions.

When should I call a plumber about my main water shut-off?
Call Sweetwater right away if water is pouring and you can't find or turn the main shut-off. Call or text if your valve is stuck, leaks at the handle, or doesn't fully stop the water; we'll go over your options for replacing it. On every service call, our techs label each shut-off they find. Call (909) 312-4516 (phones answered 24/7) or text (909) 247-6791.
Is it safe to do this yourself?
Yes. Closing the main water shut-off is something every homeowner should be able to do. Turn it by hand, don't force a stuck valve, and keep clear of water near outlets or cords.
Do I need special tools?
Usually not. Most main shut-offs turn by hand. A valve in a curbside meter box needs a water meter key, so keep one with your tools.
What if water keeps running after I close the valve?
The valve may not be sealing all the way. Close the valve at the meter as described above. Call (909) 312-4516 (phones answered 24/7) or text (909) 247-6791, and Sweetwater Plumbing will take it from there.

Related Guides

Related Services

(909) 312-4516 Text us