Originally Posted by Modshack

I'm sticking with my theory of incorrectly assembled hoses. BTW, the inside will be smooth and seem bigger as the screw in piece of the fitting (Nipple) is tapered and smooth. As it is tightened it presses the Stainless jacketed side out to engage with the barbs in the outer barrel. Done wrong (see step 3) and you have a problem...Since these are re-usable fittings, it is easy to unscrew the Nipple to check for proper hose engagement..