Does this water pipe installation have problem?
I agree with ArchonOSX, it's very sloppy &amp; does violate code beyond that. It needs to be re-done &amp; even when it's right it should have a metal plate bridging more than its width so nails or screws can't penetrate it for just that bottom stud.

The jog they did has to be a minimum of 1-1/2-inches away from the underside of the floor, again so penetrations can't or aren't likely to happen. It doesn't matter how far back they have to start over with the line or where they have to move it to in order to do it right, it has to be safe from potential damage.