What is the function of a zone wire in an irrigation system?

The function of a zone wire in an irrigation system is to connect the controller to a specific valve. This connection is crucial because it allows the controller to communicate with the individual irrigation valves that are responsible for watering designated areas, or zones, of a landscape or garden.

When the irrigation controller activates a zone, it sends an electrical signal through the zone wire to open the corresponding valve, permitting water to flow into that specific section. This controlled operation is essential for managing water distribution efficiently, ensuring that each area receives the appropriate amount of water based on its needs. The ability to independently operate different zones enhances the overall efficiency of the irrigation system by adapting to varied plant requirements and local conditions.

The other options do not accurately describe the role of a zone wire. Distributing water evenly to plants relates more to the design and function of the irrigation system itself rather than the wiring. Regulating system pressure and collecting data on soil moisture levels involve different components and technologies that are not the responsibility of the zone wire. Thus, recognizing the zone wire's role in connecting the controller to the valve is key to understanding its importance in an irrigation system.