SpudFiles

I got the valves off of my mom's tires when she got new tires but I can't figure out how I could attach them to a gun

Drill a hole. Preferably where there are 2 layers of pvc (ie endcap and pipe). Put a lot of glue on the schrader valve (plumber's goop or epoxy). Slide it in from the inside. If you're going to be pushing hard on it, I would recommend putting a zippy tie on the outside to keep it from falling back in.

Drill a hole a little smaller than the size of the rubber neck. It should fit really tightly. Put some blue tac around it and it should seal if it fits tightly.

that one is broken i dont think it will work