Impeller swelling and seizing?
What causes pump impellers to swell and then causing seizing and hard start-ups? I have had that happen to a couple pumps (different brands) so far, and then have had others running for many years without a problem. Is this just a defective impeller or some other cause, like not cleaning enough? These pumps are run underwater so can't be because of overheating. Or is it just bad luck?
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