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Thread: Pump sounds like a piece of plastic is bouncing around, no water movement

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    Pump sounds like a piece of plastic is bouncing around, no water movement

    Guys, my wife pointed out the pump was making a funny noise...I said "The pump is not even on", as water in the pool was still.
    Cleaned the pump basket, and after restarting, there was no customary rush of bubbles into the basket, and the noise persisted.
    After shutting down the pump, you continue to hear the sound of plastic bumping around for 2 seconds.

    Is my impeller gone?
    19k gal, STS1072R A.O. Smith C-Face Motor .75HP Full-Rated 2-Speed, Hayward Sand Filter

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    Mod Squad zea3's Avatar
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    Re: Pump sounds like a piece of plastic is bouncing around, no water movement

    You will need to take the pump apart to check if the impeller is damaged, or if somehow it came loose.
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Pump sounds like a piece of plastic is bouncing around, no water movement

    How is the impeller attached? Man, I've changed this pump before myself, and can't for the life of me recall what it looks like inside.
    Do replacement pumps come with impellers, or did I most likely re-use the old one?
    19k gal, STS1072R A.O. Smith C-Face Motor .75HP Full-Rated 2-Speed, Hayward Sand Filter

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    Mod Squad zea3's Avatar
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    Re: Pump sounds like a piece of plastic is bouncing around, no water movement

    If you buy the whole pump it will include the impeller. The pump motor bolts onto the wet end (where the water intake from pool and outflow to filter are located). The impeller is in the wet end. If all you did last time was switch out motors then you did not change impellers. What brand is the pump?
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Pump sounds like a piece of plastic is bouncing around, no water movement

    Just reviewed the YouTube video on changing a pump motor. Seems likely the impeller is somehow gotten loose. The sound I hear for 2 seconds after shutdown is the impeller spinning loosely. Will disassemble tomorrow and inspect.
    19k gal, STS1072R A.O. Smith C-Face Motor .75HP Full-Rated 2-Speed, Hayward Sand Filter

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    Re: Pump sounds like a piece of plastic is bouncing around, no water movement

    The threaded portion of the impeller had sheared off, so new impeller.
    19k gal, STS1072R A.O. Smith C-Face Motor .75HP Full-Rated 2-Speed, Hayward Sand Filter

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