this should save you a bit if work
http://www.philmac.co.uk/products/details/?type=2&sub=33[/QUOTE]
The only snag with them is that they're so bulky and you often just don't have the space to get them in.
I've also come across this (16mm?) copper on a few occasions (it would be interesting to find out who manufactured it) On the few occasions I used a 15mm drift (socket forming tool) to open up the 16mm anf form a socket that my 15mm Cu tube would fit into.
Takes a lot of cleaning on the inside of the 16mm though and don't forget that drift sockets were banned by most local water authorities a long time ago.
Then again you are the plumber and you have to something to get the water on!!!!
Servotech,