Don’t know how you got the end of the tubing broken off in the gauge Chuck. If anything when the double compression nut is tightened up it should make the tubing smaller not larger. These are one-way fittings, once it’s made up it is not meant to be removed and used again like a standard compression fitting.
You can see that in this picture and you can see the correct amount of tube that extends beyond the compressed area:
http://www.pbase.com/dennygraham/image/137898151/original

Denny Graham
Sandwich, IL


Denny G
Sandwich, IL