[ELI5] Why does pumping air wreck water pumps?

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Saw it on a package for a water pump that it shouldn’t be run dry for more than 1 second. If air is going through it, which requires less energy to move than water, then it should be no big deal, right?

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Anonymous 0 Comments

The seals aren’t designed to run dry and will fail if the pump is run with with no water being pumped. They usually fail by overheating as the water is used as a coolant and lubricant.

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