What should be performed after securing the water supply?

Securing the water supply is a critical step in fire operations, and closing the tank to the pump is important to prevent water from inadvertently leaving the pump system after the supply has been established. This action helps in maintaining the water pressure and ensures the pump remains primed, allowing firefighters to effectively manage the water flow to protect lives and property.

While other options might seem relevant in different contexts, they do not directly follow the procedure of securing the water supply. For instance, testing the pressure gauge typically occurs before securing the water supply to ensure the system is operational and functioning correctly. Removing hoses is generally done after the fire suppression activities have concluded and is not a priority immediately after establishing the water supply. Starting the engine, while necessary for operations, may also precede or coincide with securing the water supply rather than being a sequential step to follow it.

Therefore, closing the tank to the pump is a critical action to safeguard the water supply system and maintain effective operations during firefighting efforts.