What is a common indicator of cavitation in a pump?

Cavitation in a pump is often indicated by symptoms such as vibrations and noises that resemble the sound of pumping rocks. This phenomenon occurs when pressure in the pump drops below the vapor pressure of the liquid, leading to the formation and collapse of vapor bubbles within the fluid. When these bubbles collapse, they create shock waves and high-frequency noises, which can be perceived as harsh or irregular sounds. This disruptive behavior causes both vibrations and notable noise levels, deterring the smooth operation of the pump and signaling a problem that needs addressing.

In contrast, high energy consumption often results from inefficiencies but may not indicate cavitation directly. Intermittent noises can be a symptom of various pump issues, but they do not clearly or specifically denote cavitation as distinctively as the sounds of cavitation do. Consistent performance would suggest a well-functioning pump, and therefore would not be associated with cavitation, which typically disrupts normal operation.