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Thread: Filter question

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    Join Date
    May 2007
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    Fayetteville, Arkansas
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    Filter question

    When opening the pool and vacuuming to waste, I noticed green algae slowly coming out of the returns into the pool. Is this an indication something is worn in the multi-selector? Thanks.
    20x40 30,000 gal IG Liner, Pentair II Sand

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    smitty195's Avatar
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    Feb 2015
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    Melbourne, Victoria, Australia.
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    Re: Filter question

    Not necessarily. ... if you have algae in you pool your filter will not alway trap the fine particals.... im assuming you have a sand filter...?
    A better idea is to fill the pool with as much water it can hold... then select waste on your multiport valve/selector.
    And vacume as much of the algae to waste...rather than have it go through your filter..

    intex ultra frame round pool 6831g totally hard plumbed with hayward variable speed pump and jandy cs150 cartridge filter... plus a solar heating roof system with a .75 onga pump and 24" sand filter.

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    Jun 2014
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    Houston
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    Re: Filter question

    Quote Originally Posted by Rangerman View Post
    When opening the pool and vacuuming to waste, I noticed green algae slowly coming out of the returns into the pool. Is this an indication something is worn in the multi-selector? Thanks.
    Gasket in the MP valve may be defective.
    30 year old, 17,000 gallon pool (w/spa), IG, Plaster, Pentair Triton II TR-100 600#Sand Filter, Pentair Superflo 340043 1.5 Hp pump

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    smitty195's Avatar
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    Feb 2015
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    Melbourne, Victoria, Australia.
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    Re: Filter question

    My bad... i didnt read your post properly.... sorry.
    Revised answer is,,,, Yes, you could have a defective spider gasket in your multiport valve
    Or as i said before, the particals could be extremely small and be passing straight through your filter media.
    What you could try if your confident enough is dismantle the top of the multiport valve and lube the gasket with some magic lube or something similar,,, then put back together and see if for a short while it stops,,,, if it does then you know its the gasket.

    Hope this helps.

    intex ultra frame round pool 6831g totally hard plumbed with hayward variable speed pump and jandy cs150 cartridge filter... plus a solar heating roof system with a .75 onga pump and 24" sand filter.

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    duraleigh's Avatar
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    Apr 2007
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    Re: Filter question

    Is this an indication something is worn in the multi-selector?
    Certainly can be. once you resolve that issue, get some chlorine in your pool and get rid of that algae......although I must say you may not have noticed the issue if it wasn't for the visible algae.....that may be a first where algae actually helps someone
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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