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  1. G

    Pool filter issues when vacuuming

    When vacuuming my pool, everything works fine for about 10 minutes. After that, dirt comes from the return line back into the pool. The sand filter is working to some degree, as when I backflush it, the water is very dirty. It is not sand going into the pool. HELP...
  2. G

    Dirty return water when vacuuming

    gresta46001 here. New to this forum, and obviously have a problem with my pool. 21,000 gal, IG Vinyl, DE Filter, 1HP 11/2 inch pump, Hayward filter (size unknown). The filter has a Hayward Vari Flow valve on it. When I am vacuuming the pool, it works well for about 5 or 10 minutes, then the...