when it doubt.. use lube
Tried using some juice as lube. Didn't work. It's metal on metal. The open side is the perfect diameter, but the threaded end is like .01 mm too wide, like when they pressed the bottom end in, it widened the tube.
All 5 cartos in the box have the same problem.
its likely intentional to help prevent leaks or to keep the tank from sliding off it.. or its just really accurate bad QC =P
Maybe in a sliding type tank it would be a good feature, if you have a forgiving o-ring. Maybe I have a bad batch. Just wondering if anybody has used this on an AGR tank successfully. If not, looks like I get to pick up a new tank!