For non-pressurized tanks, when does the signal initiate when the water falls?

In the context of non-pressurized tanks, the appropriate signal initiation occurs when the water level falls 12 inches. This threshold is critical because it ensures that the monitoring system is responsive enough to detect significant changes in water levels that could indicate issues such as leaks or other problems.

By setting the initiation level at 12 inches, the system provides a reliable early warning to operators or maintenance personnel, allowing them to take timely action to prevent potential damage or operational failures. The choice of 12 inches is often based on industry standards and safety practices that aim to minimize risks associated with low water levels in non-pressurized systems.

This particular value balances the need for prompt responses with the practical realities of monitoring and maintaining water levels, ensuring systems remain efficient and safe to operate.