When we built our first home I used ABS for everything under the basement floor, not sure why, probably the guy at the hardware store recommended it. I never knew what ABS stood for until now, some one told me years ago it was all black $hit! I have used a lot of black poly water line, it's available in 80 psi to 160 psi ratings. 80 psi for sprinkler lines, 100 psi for water lines from wells into houses, and 160 psi for hanging submersible well pumps on. I've never had a problem with any of it, my dad ran poly water lines all over the farm yard in the early 50's, and they are still being used today.