Hi, I am by no means a plumber, however I am trying to fit a new Bathroom sink. As I don't know the correct terminology I have attached a couple of pictures to try and help explain it. I have attached an elbow stop pipe piece to a copper pipe and have no problems with this. However I have attached a flexi pipe onto this and then another flexi pipe onto this one which is attached to the tap. However the flexi pipe attached to the elbow stop connector starts leaking very badly when I open the stop pipe. However does not appear to leak when it's not attached to the other flexi pipe. As I have no real knowledge of this I realise I am missing something, or got the wrong flexi pipe, can someone advise me please on what I need to do? Many thanks wrong flexi pipe, can someone advise me please on what I need to do? Many thanks.