Yes, you will typically hear a low motor hum and the sound of rushing water when your sump pump is operating normally. However, if the pump starts making loud grinding, squealing, rattling, or banging noises, it indicates a mechanical problem such as worn motor bearings, debris trapped in the impeller, or a slamming check valve. A healthy submersible pump running underwater should remain relatively quiet aside from the water movement. Verification: Listen to the pump during a manual bucket test to ensure the motor hums smoothly without harsh grinding sounds.
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