What is the maximum recommended distance for 18-gauge wire from the controller to the valve?

The maximum recommended distance for an 18-gauge wire from the controller to the valve is 800 feet. This guideline is established to ensure that the signal sent from the irrigation controller to the valve remains strong enough to operate the valve efficiently.

Longer distances can result in voltage drop, which may impair the ability of the controller to effectively open or close the valve. An 18-gauge wire has specific characteristics regarding resistance and current capacity, making it suitable for runs up to 800 feet. Beyond this distance, issues such as inconsistent valve operation or failure to activate can occur, leading to inefficiencies in the irrigation system.

Understanding this limitation is crucial for proper installation practices in irrigation. It helps technicians maintain system performance and avoid potential operational problems with valve control.