Locating the Main Shutoff Valve for an Existing Sprinkler System

When a newly purchased home's 15-station sprinkler system shows power at all solenoids but no water flows, the issue is almost certainly a closed main shutoff valve. These are often overlooked because they're separate from the house's main water valve.

Where to Look

• Near the house main shutoff: A dedicated ball or gate valve on the irrigation supply line, usually above ground in a box or near the foundation.
• At the water meter: A valve box buried near the meter where the irrigation tee connects to the service line.
• Follow the wires: Trace valve wires from the controller to the valve manifold—the main shutoff is typically within a few feet.

If You Can't Find It

Gentle excavation along the suspected supply line every 2–3 feet will reveal the connection point. Once located, install a visible valve box for future access. Don't assume the system is broken—most "dead" systems just need the main valve opened.