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Thread: Circulation/suction loss

  1. Back To Top    #1

    Join Date
    Jul 2009
    Charlotte NC

    Circulation/suction loss

    How often should sand be replaced in a filter? Is it easy to do? My VERY green pools pump seems to lose suction
    after about an hour of running.Backwashing seems to restore temporarily
    16x34 kidney shape 19,000 gal vinyl IG
    Pentair IC-20 SWG
    Pentair sand filter
    Pentair 1HP pump

  2. Back To Top    #2

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Circulation/suction loss

    I sounds like you may be equating the old sand to the reason your pool is not clearing. They are not related. Your filter is losing suction because it is doing what it is supposed to do but there is so much junk going in to it, it is clogging up very quickly.

    You have to kill that algae with chlorine first and then use your filter to clear it up. Backwashing frequently is part of that clearing process.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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