Originally Posted by
woodcraft
IMO, when your pump unscrews the valve core,
it's telling you to get a better pump.
It is stupid, essentially counter-productive, and a horribly frustrating thing to have to deal with. I do like the Lezyne Road Drive with Pen Gauge in every other way, though. Still, a pump is supposed to inflate, not deflate, so I should look at the options, I guess.