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Thread: Another Filter Sizing Question

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    Another Filter Sizing Question

    Joined: January 25th, 2009, 10:01 pm


    I'm sure this has been addressed a million times, but I will still ask. I have an 7,000 gal fiberglass pool with a 6 person spa that flows into the pool. My pump is a Sta-rite 1-1/2 HP motor with a P6E6F-207L pump. The pump chart says that it will pump 110 GPM @ 20 psi and around 75 GPM at 32 psi. The reason I have this size pump as it is used to supply the flow rate to the spa. I am currently using a Sta-rite PLM 150 cartridge filter, but I am going to switch to a sand filter as I live in West Texas and this spring I have been cleaning the cartridge once a week due to our never ending wind and dirt. My question is shouldn't I size the filter for the pump rate and not the turnover rate of the pool. I was thinking of going with a pentair 100 GPM filter, which I realize is gigantic for my pool, but sized for the pump.



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    6800 gal fiberglass pool w/300 gal spillover spa, shared 1.5 HP pump and 150 sq ft sta-rite cartridge filter. Goldline PS-8 automation and SWG.
    6800 gal fiberglass pool w/300 gal spillover spa, shared 1.5 HP pump and 150 sq ft sta-rite cartridge filter. Goldline PS-8 automation and SWG.

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    Re: Another Filter Sizing Question

    Your thinking is on the money. With that pump a 100gpm filter would be the SMALLEST I would consider.

    Confirming what you already know you are w-a-a-ay overkill on that pump. The smallest pump (.5 HP) you can find is perfectly adequate and can save you some electricity and the expense of a large filter.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Another Filter Sizing Question

    Thanks for the help!
    6800 gal fiberglass pool w/300 gal spillover spa, shared 1.5 HP pump and 150 sq ft sta-rite cartridge filter. Goldline PS-8 automation and SWG.

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