What is the likely cause of pump cavitation in a pool system?

Pump cavitation in a pool system occurs when the pressure inside the pump drops to the point that it causes the liquid to vaporize, creating vapor bubbles. These bubbles then collapse with force, potentially damaging the pump and impairing its function.

A clogged skimmer basket can impede the flow of water returning to the pump, leading to a drop in pressure. When the water supply to the pump is restricted due to this blockage, it can create conditions ripe for cavitation. As the pump struggles to draw in enough water, the pressure can fall below the vapor pressure of the water, leading to cavitation.

Similarly, a full hair/lint strainer can also restrict water flow to the pump. Just like a clogged skimmer basket, when the strainer is full, it restricts the amount of water that can move through it, again causing a decrease in pressure and creating an environment conducive to cavitation.

Thus, both a clogged skimmer basket and a full hair/lint strainer can contribute to pump cavitation by limiting water flow and reducing the pressure within the pump. This makes the combined option of both situations the likely cause of pump cavitation in a pool system.