Character profile
Cavitation Goblin is the noisy troublemaker hiding in bad suction conditions. He loves restrictions, air leaks, low inlet pressure, clogged strainers, and pumps forced to operate where they should not.
Role in PumpDaily
Cavitation Goblin appears when water does not arrive at the pump properly. He is the character version of vapor bubbles, rough noise, vibration, pitting, and damage risk.
In Episode 2, Pump Boy hears a rough, gravelly sound and thinks the motor is the problem. Cavitation Goblin points at the suction side and reveals the real lesson: water must arrive properly.
A pump cannot perform well when the inlet is starved, restricted, full of air, or operating outside safe conditions.
The Goblin does not need a dramatic failure to start trouble. A clogged basket, undersized suction line, partly closed valve, too much lift, low water level, or small air leak may be enough.
When local pressure drops too low inside the pump, vapor bubbles can form. When those bubbles move into higher pressure areas, they collapse. That collapse can create noise, vibration, pitting, and damage.
The symptom may sound like rocks or gravel inside the pump.
A noisy pump may point to cavitation, air, bearings, debris, vibration, or other issues. Cavitation Goblin teaches readers to check the inlet side, source water, valves, strainers, pipe size, and operating point before guessing.
The Goblin retreats when the pump gets adequate water supply, clean strainers, open valves, correct pipe sizing, fewer unnecessary restrictions, proper source level, and operation within the intended range.
The exact fix depends on the system, but the principle is the same: do not make the pump fight for water.
