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Thread: New pump, barely moving any water

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    Join Date
    Jun 2016
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    Wichita, KS
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    New pump, barely moving any water

    Our 3/4 Hayward power-flo kicked the can after about 10 years. You could literally hear the thing from a mile away it was so loud and was losing power daily. I picked up a 1 HP maxi-pump from a local pool store for about $270 (after tax). Model number AC 1000mxv. The new pump however is barely moving any water. I don't understand what could be wrong other than it is just a bad motor. It has higher HP and a higher GPM than our old pump, but is barely working at all. Is it just a horrible brand or what?
    10,000 gallon AG. Sand filter (both filter and pump hayward). Pump is a single speed. Pool is 10 years old, liner replaced last year. Test kit: K-2005.

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    duraleigh's Avatar
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    Re: New pump, barely moving any water

    What is the psi on the gauge? Is the pump basket completely full of air or does it have a lot of air?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Jun 2016
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    Wichita, KS
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    Re: New pump, barely moving any water

    PSI is 12. The pump basket is full of water with minimal air. I backwashed for a couple of minutes until the water ran clear, it apparently had been a long time since that had been done, because that seemed to alleviate the issue. It is flowing nicely now, I guess without the loud incessant hum that could possibly be classified as psychological torture it just didn't seem right.
    10,000 gallon AG. Sand filter (both filter and pump hayward). Pump is a single speed. Pool is 10 years old, liner replaced last year. Test kit: K-2005.

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    Mod Squad pooldv's Avatar
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    Re: New pump, barely moving any water

    Hayward is a good brand. We recommend backwashing the filter when the pressure rises 20-25% above clean pressure.
    More here, Pool School - Maintenance and Cleaning of Pool Filters
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