Originally Posted by Barcobird
Thanks CJ, so there is no chance of the bung coming out when you are bombing along at 30 knots
When twisted up, the lever expands the bung and holds it in place. No they don't fall out underway, obviously fold the lever in a way it won't get dislodged. I have no idea about the flapper part, but the tube was installed correctly.
If you don't like that type of bung, then get a screw-in type instead of the lever type.