In connecting the 10mm speedfit to the TRV,I am pushing the pipe into the ferule with pipe support and it is a close fit..there seems to be no way to use a brass olive so the speedfit pipe is not locked into the valve. The nut to lock the pipe in place has a top hole about 13mm diameter so couldn't squeeze an olive.
Am I doing something wrong?
PS. By ferule..I mean the collet type thing of which there are 2, 8mm and 10mm.