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Thread: Weak suction and return

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    Join Date
    Jul 2016

    Weak suction and return

    When i have handle set to 'filter', the suction starts out fine, but after few minutes it gets weak. Figured I had air leak. I've checked all connections, made some tightenings, changed hoses, cleaned DE filter, but still suction and return is weak. However, when I set filter to 'backwash' or 'reciruclating' modes, the pressure is perfect. Could there be a problem with the filter handle setting? Could the interior get worn out?


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    TFP Guide
    cowboycasey's Avatar
    Join Date
    Jul 2013
    Fletcher, OK

    Re: Weak suction and return

    Welcome to TFP

    How does your water look? With a DE filter it works great but as you found they will get clogged very fast with a green pool..

    Do you have your own test kit?

    We can help but we need to see what is going on with your water..

    I hope this helps
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
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  3. Back To Top    #3

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

    Re: Weak suction and return

    Welcome to the forum.

    In short, your filter is doing exactly as it is supposed to is filtering debris from your water and quickly clogging up. Your problem is in your water chemistry which is allowing algae (whether you can see it or not) to accumulate in your pool.

    As you read further, you will see we are advocates of precise testing and underswtanding what and why you are testing.

    Please read "The ABC's of Pool Water Chemistry" up in Pool School
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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