On Wed, 04 Feb 2004 15:22:54 -0700, someone wrote:


Copper's a much better heat conductor than PEX -- the water inside's the same
temp, but it gets transferred to you hand much more efficiently by the copper.

What he said. Bottom line, the PEX is like insulation, like its an
insulated pipe (compared to the copper). Because it is thin it still
conducts significant heat, but not anything like the copper (which in
addition to being a better conductor, is probably even thinner
walled).

-v.