I dunno, man, I just plug it in and hit the button and it runs. I'm no plumber, I just got the one that got the best reviews on Wirecutter. I would describe it

I dunno, man, I just plug it in and hit the button and it runs. I'm no plumber, I just got the one that got the best reviews on Wirecutter. I would describe it as a black box that I put dishes, detergent, and water into, and usually get clean dishes out of, except its housing is white. It's probably not actually pulling in water for the entire two hours. But it wants to be able to pull in water at several points during its cycle, as well as squirt it back out into the sink, and I have absolutely no interest in trying to guess when it would be safe to disconnect the hose and risk having it piss a bunch of water all over the kitchen (because the hose got left somewhere) or having it error out because it can't get water when it needs it.