Replace buried polybutelyne/Qest with Pex
That tool you're looking at works in soil. I doubt it would be able to break up a concrete slab as you pull it.



I didn't realize that you were talking about just the main water line. It is very likely that the main runs under the slab. The piping to your fixtures is probably in the slab.

For your main line, the simplest solution is to trench in a new line, but find a more convenient way to get it in to the house, and run the rest of the way from there through walls and ceiling. That way you only have to drill a hole in your slab near an exterior wall.

Or, depending on your climate and local code, you can come up the side of your house and enter through a wall. Here in central Florida, this is a perfectly acceptable solution.