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Thread: Whisper Flow Pump

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    Whisper Flow Pump

    I recently replaced my pump motor since the other motors bearings were wearing out and making a lout squealing noice. Once I installed it it was so nice and quiet. This was maybe 2 months ago. Since then its gotten louder each week. It sounds more like the pump this time. So I separated the motor and checked the impeller and no signs of issues. Only thing I've noticed is that one of the skimmers doesn't appear to have strong suction like the other skimmer so I think I have a block somewhere. Would a block cause the pump to be more noisy than normal?
    15000 Gallon, Taylor K-2005 Test Kit, DE Pentair filter.

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    mas985's Avatar
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    Re: Whisper Flow Pump

    Quote Originally Posted by icyjay View Post
    Only thing I've noticed is that one of the skimmers doesn't appear to have strong suction like the other skimmer so I think I have a block somewhere. Would a block cause the pump to be more noisy than normal?
    It could if the pump was cavitating.

    Does the pump sound like small pebbles are traveling though it?

    Do you know what the clean filter pressure was before and what it is now?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: Whisper Flow Pump

    then and now the psi after a filter clean or backwash is around 10psi. It was 10psi then also when the motor was replaced. This morning I took out the filter grids and they were very dirty and caked up. So those were cleaned and backwashed for a few minutes and again the pressure is 10psi but still seams noisy to me. There doesn't appear to have an air leak as there are no bubbles in the pump window.
    15000 Gallon, Taylor K-2005 Test Kit, DE Pentair filter.

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    mas985's Avatar
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    Re: Whisper Flow Pump

    If the filter pressure has not changed, then it wouldn't be cavitation. However, you may have something stuck in the impeller that is making noise.

    Also, sometimes the pump can make a vibration in the pad equipment. If you push down on the pump lid, does the sound go away?

    Can you make a recording of the sound?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    Re: Whisper Flow Pump

    I tried pushing on the pump lid and the noise was the same. I remembered I had a new pump lid gasket, I replaced it added some magic lube and it seams to be better. Maybe it was some air leakage?
    15000 Gallon, Taylor K-2005 Test Kit, DE Pentair filter.

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    mas985's Avatar
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    Re: Whisper Flow Pump

    Quote Originally Posted by icyjay View Post
    There doesn't appear to have an air leak as there are no bubbles in the pump window.
    Then there is no air leak.

    Again, any chance of posting a video of the sound?
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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