"bob" wrote in message
...
I am fitting 22mm compression stop end to a cold water pipe in my
bathroom and was wondering how far onto the pipe should the
compression ring go? Many thanks.

Put the nut onto the pipe first.
Next slide on the olive (compression ring). At this point you can add
lubricant if you wish.
Put the cap on the end of the pipe until it stops then push up the nut with
the olive to the cap threads and screw together without lifting the cap.