My pump is 4 years old and is making a whining / buzzing sound. Wht should I do?

Hi Jay, The noise that you're hearing is an indicator that the bearings is failing. You can either replace the VFD Motor 350105S or the bearings. We do not have the bearing specs, you will have to contact Pentair at 800.831.7133 or take the motor apart to get the bearing size. 
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