What should be done if there is a continual decrease in water level while drafting?

Opening the tank fill valve is the appropriate action when there is a continual decrease in the water level while drafting. This scenario typically indicates that the water source may be becoming depleted or that the drafting operations are drawing more water than the source can provide. By opening the tank fill valve, you allow for a replenishing flow of water into the tank, which can help maintain an adequate water supply for ongoing operations.

This action is crucial because it enables continuous firefighting efforts without interruption due to a lack of water. It is a proactive measure to ensure that there is always enough water available for pumping, which is vital in emergency situations.

In contrast, replacing the pump would be premature and is not a solution to the immediate issue of insufficient water supply. Checking for leaks might be relevant but does not address the urgent need for water replenishment. Shutting down operations immediately could lead to adverse outcomes, especially during an active incident where maintaining water supply is critical.