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Can I use a water pump as a vacuum or air pump? Will it damage it or will it simply not work?

Also can I use a water pump to completely dry a tank that was filled with water

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  • Do you have a vacuum? Preferably wet-dry like shop vac. – brian Apr 8 '17 at 14:50
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You cannot use a water pump to pump air. A water pump is designed to move fluid with a viscosity and density that is 1000 times greater than air. The water pump needs the lubrication and cooling of the water passing through it to keep it from overheating. Running a water pump dry will ruin it in short order. Also it will not effectively pump air.

  • Also can I use a water pump to completely dry a tank that was filled with water like all the drops? – Diogo Apr 8 '17 at 9:43
  • @Diogo - no. Like Jim Stewart said, a water pump must be pumping water. As soon as you stop running water through it continuously, bad things happen to the pump. – Roberto Apr 8 '17 at 10:24
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    Stating plainly that "you cannot use a water pump to pump air" is not really true; it depends on the type of pump. If the answer said "you cannot use that type of water pump to pump air", it might be accurate. Certainly a common centrifugal water pump will not work to pump air but some types of pumps will do both (like a rotary sliding-vane pump, or a diaphragm pump). – Jimmy Fix-it Apr 8 '17 at 14:03

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