On Tuesday, June 28, 2016 at 4:47:20 AM UTC-4, Tom Gardner wrote:
My neighbor's got a leak in the hot water line running from the manifold
in her utility room to the kitchen sink. The copper line is in or just
bellow the concrete slab. The plumber has to dig up a substantial
portion of the kitchen floor to replace the corroded line. He's going
to use Copper. Wouldn't it be better to use PVC?

If it is hot water, you might use CPVC. But not PVC. PVC is not good for hot water.

Dan