On 10 Nov 2006 05:34:31 -0800, wrote:

I'm planning to replace some old galvenized pipes in my 45 year old
home with more modern PEX. I plan to leave the lines leading up to
each fixture from the crawlspace in galvanized, so I need to find a way
to connect the old galvenized to the new PEX.

Use an adapter. Male or female pipe thread on one end, PEX connector on the
other.