replying to dpb, Joe Kauffman wrote:
It's 3/4" pipe, says Orangeburg SP 160psi Water on it. My Dad owned an
underground construction company here for 30 years and said almost all the
services they ran back then for water was this pipe and used brass compression
fittings, but since new homes have changed, we can't find any fittings. Which
seems strange because there's thousands upon thousands of homes in the Phoenix
area that have this pipe installed. The leak is under a 24' wide slab of
driveway and I have no interest in repairing so I found the pipe before it
runs under that concrete and just want to cap it off. Hopefully this picture
helps.
https://www.homeownershub.com/img/9b