On Wed, 10 May 2017 12:14:02 GMT, Joe Kauffman
m wrote:

I own a 40 year old home in AZ that has an Orangeburg pipe teed off the
mainline to a faucet. The pipe is leaking under the driveway but I've managed
to dig it up and exposed about 3 feet. I'm trying to figure out the best way
to cap the line, I'll worry about supply to the faucet later.

If it only feeds a faucet, you may be able to slide 1/2 or 3/8 pex
inside the existing pipe.
--
Mr.E