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Reversing Water Flow In Lifter Pumps - Bad For Pump?

Discussion in 'Filters and Filtration' started by Homeslice, Apr 3, 2019.

  1. HomesliceValued MemberMember

    Not really a filter question, but this seemed like the best place since its pump related.

    I have two lifter pumps, one by my aquarium and one by my bathtub. I have a looong hose that connects them. They make water changes easy - I just plug in the one in the tank, then when it gets sufficiently empty switch over to the one in the bathtub to refill the aquarium.

    Question - I've been unplugging the pumps on the output end each time. But I see now if I just leave them plugged in water still flow just fine - it flows right through the pumps on the output side (reverse flow).

    If I leaved them plugged in when I do this will it hurt the pumps? Sure saves me some time if it won't...

  2. CichlidudeWell Known MemberMember

    Don't think so. It's just spinning the impeller the opposite direction but no power. If the impeller is spinning at all.