Reversing Water Flow In Lifter Pumps - Bad For Pump?

Homeslice

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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...

Thanks!
 

Cichlidude

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

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