This may be normal since pumps produce water flow. The motor has a cooling fan internally which can be heard to a certain degree. It is advisable not to locate any pool pump under someone’s bedroom window. The pump’s sounds can be caused by vibrations between the pump base and the base or concrete pad it is sitting on. A piece of old carpet or rubber between the pump and base may quiet the sound.

The bearings may be noisy due to normal wear. Feeding high concentrations of chemical tablets in the skimmer will cause corrosive damage to the pump seal, which can leak and damage the motor bearings. It is recommended to get the bearings replaced by a qualified motor repair shop. Also, cavitation due to improper suction line sizing, leaks in the piping, a blockage in the suction line, or a low level of pool water will cause higher than normal sound.

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