Why is it important to monitor the speed of a variable speed pump in a water system?

Monitoring the speed of a variable speed pump in a water system is critical to preventing cavitation, which can significantly damage the pump and reduce its efficiency. Cavitation occurs when the pressure within the pump falls below the vapor pressure of the water, leading to the formation of vapor bubbles. When these bubbles collapse, they can create shock waves that can erode the pump components, leading to costly repairs and reduced operational life.

By adjusting the speed of the pump appropriately, operators can maintain sufficient pressure to avoid conditions conducive to cavitation, ensuring the pump operates efficiently and reliably. This also enhances the overall stability of the water system, as it helps in managing flow rates and pressure levels effectively, thereby contributing to the longevity of the infrastructure.