Nobody has mentioned it yet, but there does exist threaded copper pipe.

Both the house that I rented in Winchester MA and the one I owned in
Lowell MA had threaded copper.

Yes, this is a somewhat rare form of pipe, but I had two houses full of the
stuff. It was joined with solid cast copper fittings with NPT threads.

"Capt.Doug" wrote in message
...
Is there a way to join copper tubing for the house's plumbing without
using
lead solder?

D.