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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
  • @JimmyFix-it do you know if they are drill pump for those pumps (sliding-vane or diaphragm)? I dont find anything, I wonder why. Is it because a drill turns too fast? – JinSnow Oct 8 at 14:58
  • It's because specialty pumps are expensive, and consumer grade drill pumps are cheap by design. Some drill pumps use rubber flaps to move fluid, and they will move air... but not for too long. You need a wet/dry vacuum, they work on a different principle to move water and/or air. – Jimmy Fix-it Oct 10 at 3:18

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