From what I read, "regular" PVC is not for food applications. You have to get uPVC or Rigid PVC (same thing I believe.) But I can't find it anywhere. Is Schedule 40 the same across Rigid and on Rigid? I'm asking can Schedule 40 sometimes be food grade NSF-51 or other non-toxic and other times refer to regular PVC with plasticizers?
Edit: Sorry. This is for Hydroponics and growing food.