whats causeing leaks in copper water lines

iam on a slab had a leak in water line from water pit to house leak was under house had it fixed 2 weeks later had another leak within 4 feet of first
iam going to have the whole incoming line replaced but worried about the rest of plumbing under house the first leak was pitted from outside of pipe. is there anything i can do to prevent the rest of plumbing from leaking

As I understand it, copper in/under a slab should be protected before the concrete is poured to help isloate it from the ground and concrete. What most people do when they have leaks in the slab supply lines is move them either into the walls, or into the attic. The attic is often easier, but depending on where you live, can be problematic either because the attic gets really hot or very cold. They can be run in the walls, or in a small chase near the ceiling, too. Depends on the house's layout, climate, and your preferences.

Other than total replacement of the lines under the slab there is nothing you can do to stop leaks.