Valve Adapter

At the risk of sounding like a complet idiot, how do you use a valve adapter :roll_eyes: . Do you just screw it on and pump it up? That is what I tried but it didn’t work. I would greatly apreciate ansewers, as I am wanting to ride to school tomorrow, but my tube is flat. Thanks to anyone who responds.

EDIT-Nevermind, I just got it. Ihad to unscrew that thing on the innertube(If that made sense). :roll_eyes:

First, screw the knurled “nut” out on the presta valve, then screw on the adapter. Sometimes you have to screw it on pretty tight or it will not allow the pump fitting to push the valve open so the air can flow into the tire.