Irrigation Shutoff Valves

You can find the shutoff valve for your irrigation system in your basement or utility area. 

Well Systems

The valve is found between the incoming well line and the pressure tank.
Shutoff Well2

City Water Systems

The valve is usually found in the ceiling between the water meter and hot water tank, on the cold water line. 
City-Plumbed-510-X-382

Irrigation ON

The valve handle is in line (parallel) with the shutoff valve
Shutoff in ON

Irrigation OFF

The valve handle is at right angles (perpendicular) to the shutoff valve
Shutoff in OFF