Quote: (Originally Posted by
jdicediver)

IMHO, probably a cost issue, as Swagelok product is expensive. All components (from both mfg) are likely 02 compatable or ISC wouldn't use them. Undoubtably <most> users have had no problems with the QC4. I did, and subsequently have had no leaking at the fitting connections since the retrofit. If I get a chance, I will post comparative pics showing the obvious differences later tonight.
Thanks John, pics would be greatly apreciated. I'm a bit surprised as Jerry at ISC told me it's a Swagelock part.
Tibby