Originally Posted by Jorgen
I had no problem with the poppet either. I did get a Firestone post instead of Cornilius as it has a shorter threaded area. Maybe that is the way to avoid this possible problem.
The Firestone has the proper threads to work with the adapter while the Cornilius doesn't (fine vs course). The issue I was having was that the the flare fitting was bottoming out inside the post and not going in far enough for the poppet to seat on it. A single washer fixed this. I think the issue with leaking or not has more to do with the fittings we choose and not the post it self.
OR, if the poppet feet are splayed inside the post a washer may not be required. (you know how when you pull off a post you sometimes have to really push to get the poppet out?) If this is the case, I'd be concerned that it may get dislodged on down the road and leak later.
OR, it could be the style of poppet too. I'm no poppet expert but I've seen some longer ones out there.