Quote Originally Posted by Fluids View Post
Don't see why not. The fitting is just like a John Guest fitting. O-ring should be set into a groove, air line pushes through o-ring centre, barbed push back collar has teeth that grip the tube to hold it in place ... a tiny o-ring pick with a 90deg end might work ... Figuring the right o-ring size might take a bit of working out ... If you do it make sure you tell us the O-ring size !

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Thanks mate. I just googled John Guest fitting. Having an image was the most help ever.