cool idea with the diagram I got dizzy. Well, I'll upload a pic this weekend but for now
Has an exploded view of the petcock-
the nut doesn't appear to be detachable so i'm thinking that it's broken, the petcock portion (with the lever doesn't have threads either only the portion that screws onto the tank. Also, when I go to screw it onto the tank it is pressed out and nearly comes apart (falls out).