When water is pouring out, knowing how to shut it off in seconds is the single most valuable plumbing skill you can have. Here is where your shutoff valves are and how to use them — before you ever need to.
Written bySteven Lockhart·Reviewed byMiguel Lopez, Owner & Licensed Plumber (CSLB #974600)·Last reviewedJune 2026 · 5 min read
Quick Answer
To shut off your water in an emergency, use the fixture’s own valve if the problem is at one fixture, or the main shutoff valve to stop all water to the house. The main is usually where the supply enters the home — in a garage, basement, an exterior wall, or near the water meter at the curb. Turn it clockwise (right) to close, or a quarter-turn for a lever valve. Find and test it now, before an emergency. This is part of our complete guide to emergency plumbing in West Los Angeles.
The main water shutoff valve stops all water to your home, and finding it before an emergency is the whole point. In Los Angeles homes it is commonly where the water line enters the house — along an exterior wall, in the garage, or in a utility area — and there is also a valve at the water meter, usually near the curb in a covered box. The home-side valve is the one you want for a fast indoor shutoff. This guide is part of our complete resource on emergency plumbing in West Los Angeles.
The main water shutoff valve is the valve that stops all water flowing into the home, typically located where the supply line enters the house or at the water meter near the curb.
Common water shutoff valve locations are worth checking now. The table lists where to look and what the valve typically looks like.
| Where | What you'll find | How to close |
|---|---|---|
| Where the line enters | Home-side main valve | Clockwise / quarter-turn |
| At the water meter (curb) | Meter-side valve in a box | May need a meter key |
| Under sinks & toilets | Fixture (angle) stops | Clockwise to close |
| At the water heater | Cold-inlet valve | Clockwise to close |
Here is the emergency water shut off sequence — how to turn off water to the house quickly and safely.
If the leak is at one fixture (toilet, sink), close that fixture’s shutoff valve first — it stops the problem without cutting water to the whole home.
If you can’t isolate it, head to the main shutoff where the line enters the house.
Turn a round handle clockwise until it stops, or a lever valve a quarter-turn so it sits across the pipe.
Open a low faucet to relieve pressure and drain the remaining water in the lines, then call for repair.
Want this for your home? We assess your pipes and quote a flat rate.
Get a Free QuoteA homeowner had New Pro point out their main shutoff during a routine visit.
Months later a supply line fails while they are home, and they close the main in under a minute.
The flooding stops almost immediately, damage is minimal, and New Pro repairs the line on an emergency visit — a save that started with simply knowing where the valve was.
The Bottom Line
The most valuable plumbing skill is shutting off your water fast — fixture valve for one fixture, main valve for the whole house. Find and test your main shutoff today, while it is calm, so a future leak is a minor event instead of a disaster. Need help locating it? We will show you. Call any time. More on our emergency plumbing page.
Use the main shutoff valve, usually where the water line enters the home (an exterior wall, garage, or utility area) or at the meter near the curb. Turn a round handle clockwise until it stops, or a lever valve a quarter-turn. For one fixture, use that fixture’s own valve instead.
Commonly where the supply line enters the house — along an exterior wall, in the garage, or a utility area — and also at the water meter near the curb in a covered box. The home-side valve is best for a fast indoor shutoff. Locate it before you need it.
Clockwise (to the right) to close a round-handle valve — “righty-tighty.” A lever-style (ball) valve closes with a quarter-turn so the handle sits across, perpendicular to, the pipe.
If the problem is at a single fixture, close that fixture’s shutoff valve — it stops the issue without cutting water everywhere. If you can’t isolate it or water is spreading, close the main to stop all flow.
Open a low faucet to relieve pressure and drain the lines, address any standing water safely (kill power first if water is near electrical), and call for repair. Draining reduces what is left to leak out.
Call us — we can locate it and, if it is stuck or corroded, replace it so it works when you need it. It is also worth having us point out and test your shutoff during any routine visit.
Written by the New Pro Plumbing content team and reviewed for technical accuracy by Miguel Lopez, owner and California-licensed plumber (CSLB #974600). Pipe lifespans are presented as typical ranges, not guarantees, and any pricing is confirmed in writing before work begins.
What's new: June 2026 — first publication.
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