The most obvious sign of cavitation is the amount of noise that can occur as thousands of tiny explosions occur within your well pump. So, if you hear thunking sounds or grinding like dozens of ball bearings are rattling around in your well pump, cavitation is the likely cause.

Why is my well water pump making noise?

The most common sources of unusual noise inside your pump are the impeller or the bearings. … Replacing bearings is a fact of life with every pump. Impeller noise – if debris gets into a well pump housing impellers wear faster than normal – or unevenly. Dirt and sand grind away on the impeller’s surface.

What does a bad pump sound like?

If you hear a high-pitched, whining sound that increases as you accelerate – it could indicate a faulty water pump. These sounds are caused by a loose belt and the belt becomes loose when the pulley is loose or the bearings are wearing out.