I'm adding this as a point of interest. I heard about this recently and
can't wait until it's available here. Someone I know saw new
construction being done using this new device. It uses a compression
tool to make the fitting mechanically.
http://journals.iranscience.net:800/...9,2601,00.html
" The first seal in the piping system is the copper-to-copper press
connection. With 2,000 pounds of force being applied to the connection,
the final result is a tight copper-to-copper joint between the copper
tubing and fitting."
Richard