What is it called when a pump is running out of water?

When a pump is running out of water, it is referred to as pump cavitation. Cavitation occurs when the pressure in the pump falls below the vapor pressure of the liquid being pumped, which leads to the formation of vapor bubbles. These bubbles can collapse violently, resulting in damage to the pump impeller and other components and significantly reducing the efficiency of the pump.

Pump cavitation is a critical condition to recognize because it can lead to operational failures and costly repairs. This phenomenon is especially important in fire service operations, as maintaining the proper functioning of equipment is crucial for effective firefighting efforts and ensuring the safety of personnel. Awareness of this issue helps in diligently monitoring the water supply and pump operation to prevent cavitation and its detrimental effects.