Quote: (Originally Posted by
Dave Sutton)

IF the valve is other than 1/4 tube.... you're more or less buggered. There are clunky ways to make it fit, but it'll never be right. See if Swagelok has a 1/8 tube to 1/4 tube adapter. if so, it'll work OK...
Two of this kind of adapter, if they exists, will cost more than selling the wrong valve on ebay and buy a new correct one.