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    Need help with never-ending blow back!

    First off... I have a 16x32 inground vinyl pool with a 21" sand filter. One skimmer on the side, one at the pump of course, 2 inlets and no floor drain. Acouple of months ago, my 3/4 hp pump motor burned up (I knew it was coming, it was very old) so I went to my pool store to get another one...