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Thread: Backflow issue

  1. Back To Top    #1

    Join Date
    Jan 2014

    Backflow issue

    On Saturday, I cleaned out my Pentair filter and replaced some of the old screens. When I unscrew the inline Jandy SWG, DTE flows back into the pool from the filter. I assume its DTE because it makes the water cloudy. If I run the pool pump for about an hour, the water becomes clear again. When I turn my pump off, it does not flow back into the pool. I have had the SWG for about 5 years and never noticed this until recently. Is this normal? Is there something that needs looking at? If so, what might it be?

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Backflow issue

    That is common enough. If you have a mutli-position main valve you can set it to the closed or circulate positions to prevent the filter from draining. Remember to set it back once you have the pump primed again.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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