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Overheard a plumber at the supply house say he uses a $5 aquarium pump to test dishwasher drain solenoids
He said it mimics the real water pressure and you can hear the valve click, which saved me from replacing a good solenoid on a KitchenAid last Friday.
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rayadams5mo ago
Water pressure" from a pump? That's just air flow.
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the_wesley5mo ago
Actually saw a video once where a guy explained how pumps work. They move fluid by creating a difference in pressure, not just pushing air. The impeller or piston physically displaces the water. Calling it just air flow misses the whole mechanical action. Pretty basic fluid dynamics, really.
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rose_allen605mo ago
Rayadams might want to stick with plumbing, not fluid dynamics.
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shanec613mo ago
Funny you mention that @rose_allen60, I had a buddy who swore a shop vac could drain his pool... until he actually looked at the specs on a real pump. That video the_wesley mentioned is spot on though. I messed around with a small submersible pump in a bucket once, and seeing the impeller spin made it click for me. You can feel the water getting pushed, not just pulled by some air trick. It's one of those things where the simple explanation works way better than trying to sound clever.
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