How to Shut Off Your Sprinkler System in an Emergency

A sprinkler head shears off, a lateral line bursts, a zone valve fails open — and suddenly you've got water gushing out of the ground and nowhere to go. Every homeowner with an irrigation system should know how to stop it fast. Here's exactly what to do, in order.

Step 1: Turn Off the Controller (The Fast Way)

Your irrigation controller (the box on the wall in your garage, utility room, or outside) is the first thing to try. Every controller has a way to immediately stop all zones. On most models:

• Rain Bird and Hunter controllers: Turn the dial to "Off" or "System Off." On LCD models, look for a power/off button or a stop icon.
• Toro controllers: Dial to "Off." Most Toro units also have a "Stop Watering" button that halts the current cycle without clearing the program.
• Smart controllers (Rachio, Hunter Hydrawise): Open the app and tap "Stop Watering" — this is usually the fastest method if you have your phone in hand. There's also typically a physical button on the unit itself.
• Older electromechanical controllers: Turn the dial to "Off" or unplug the unit from the outlet.

Important: turning the controller off stops the electrical signal to the valve solenoids, which should close the valves and stop water flow. If water keeps running after the controller is off, you have a failed valve — the solenoid or diaphragm is stuck open and won't respond to the electrical signal. Skip to Step 2.

Step 2: Shut the Valve Manually in the Valve Box

Your irrigation system has one or more valve boxes buried in the yard — usually green plastic lids at ground level. Inside each box are the zone valves. Each valve has a solenoid (the black cylinder on top) and a manual bleed screw or manual open/close mechanism on the side of the valve body.

To manually close a zone valve that's stuck open, look for a small screw on the side of the valve body — this is the manual bleed or manual override. Turn it clockwise to close. Do not force it — quarter to half a turn is all it takes. This physically closes the valve regardless of what the solenoid is doing.

If you can't find the valve box, look along the irrigation supply line from the meter — usually near the foundation, along the side of the house, or near the backflow preventer device.

Step 3: Shut Off the Irrigation Supply at the Ball Valve

Most irrigation systems have a dedicated ball valve on the irrigation supply line, usually near the backflow preventer or at the point where the irrigation line branches off the main house supply. This is typically a quarter-turn ball valve with a handle. Turn the handle perpendicular to the pipe direction to close it completely. This stops all water to the entire irrigation system without affecting your house water supply.

Know where this valve is before you need it. If you're reading this article not during an emergency, go find it now and make sure it turns freely.

Step 4: Meter Shutoff (Last Resort)

If the irrigation supply valve can't be found or is stuck and you still have water flowing, the main water meter shutoff is your last option. The meter box is typically at the property line near the street, under a small rectangular lid. Inside is the meter and a shutoff valve. This will cut off water to your entire house, not just the irrigation system — but if a line has burst, it's the right call.

You may need a meter key (a cheap T-bar wrench available at any hardware store) to operate the valve. If you don't have one, a flat-head screwdriver can sometimes work. Turn the valve a quarter-turn perpendicular to the pipe to close.

After the Emergency: What to Do Next

Once the water is stopped, assess what happened. A sheared-off head is easy to see. A burst lateral line will show as a wet area or mud with no visible head damage. A failed valve that won't close will require the valve body or solenoid to be replaced — that's not a homeowner repair.

Call us and describe what happened. We'll tell you over the phone whether it's something you can manage temporarily while we schedule a visit, or whether it needs same-day attention.