On Sat, 30 Jul 2011 15:13:25 +0100, Charlie Pridham wrote:

I want to be able to connect 4mm sections of tubing together - put be
able to
pull apart easily and connect up in different configuration.

At the moment I cut the tubing to overcome the "barbed" end of the
connectors.


Where are you? I have (quite) a few extra connectors - including
some "T"'s - with no barbs, they are just a snug fit and do not seem to
leak.