Keg Post Poppet Valve Type B
The most common cause of leaks originating from keg posts is a faulty poppet valve. Type B poppet valves fit Cornelius Spartan, Super Champion and kegs.
This works much better than the universal poppet valve.
Installed these in two kegs replacing another style. These seal much better even at 20+ PSI.
I attempted going with universal post valves and they worked but I wasn't ever able to get my connections to snap down correctly. I know the prongs were worn and I did replace those bit still would snap down no matter how hard you pressed. I replaced them with these. Just like that. Snapped right in and sealed up nicely.