Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Debris blowing back into pool when!

  1. Back To Top    #1

    Join Date
    Jun 2008

    Debris blowing back into pool when!

    Now that I've got the BBB method down and my pool is I have this issue.

    I've got a two speed pump/cartridge filter. When I vacuum the pool and there is visible algae/dirt on the bottom, it seems to blow back in through the return. I usually vacuum on high b/c obviously the suction is much better, but that in turn, makes the stuff blow back in even more intensely. Before I know it, I've got a murky pool instead of clear water with some dirt on the bottom. It's very frustrating. What could be causing this? My husband says it's just b/c the debris is so small, it's not getting filtered by the cartridge, but shouldn't I be able to vacuum this stuff out instead of just getting it all stirred up and waiting days for it to clear the filter? I know other pool owners are able to do this. And yes, my cartridge is clean and I do change it frequently throughout cleaning. This happens as soon as I start, however. Any ideas? Thank you!

    My pool:

    24 foot, 13,000 gallons.
    1 HP Pump; cartridge filter

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

    Re: Debris blowing back into pool when!

    If you have a multi-port valve, it might have a bad spider gasket, allowing water to bypass the filter. Or the cartridge might not be properly seated into the filter, and dirt is getting around the cartridge. Or the cartridge filter fabric is torn and is letting dirt through.

    Bad multi-port valves typically leak some water to waste, so check for that. Then examine the cartridge for tears and be sure to replace it carefully and make sure it is properly seated.
    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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts