Problematic are the measuring Inga shots that are not going to get close to a standard tube of Fa. G **** a.
The review of the inside of the tube showed no abnormalities. Thus it is very likely that the clamping Well we say is subptimal: The hose can be pushed relatively easily and also pull down again because a biting edge is missing and the piece of tubing is only about 13 mm short. The green plastic part serves only to fix the hose and not to press tightly. The nut can be arbitrarily tightened because nothing is more dense. Result see adjusted photo: It sprays out.
I will probably return and go back to the tried and tested GEKA connectors. That always works!
Let's see what AMAZON says.