I'm after the airline pipe connectors that you wfp people use. I have found one supplier, an engineering firm, but they look a bit large. I was shown some the other day that were very small and neat.
These are the ones I have looked at;
http://www.advancedfluidsolutions.co.uk/pcl-standard-airline-adaptors-84-c.asp
These are the ones I have looked at;
http://www.advancedfluidsolutions.co.uk/pcl-standard-airline-adaptors-84-c.asp