On Jun 6, 1:10*pm, "
wrote:
Three years ago I ran some plastic tubing (which I believe was
polypropylene) from my water softener in the garage, through the brick
exterior wall and into my subsurface drainage system. *The tubing
cracked at the outside of the wall and before I replace it, I'd like
some advice if polypropylene is the best material to use for this
application.

If you can do without the flexibility, a system made of gray PVC
electrical conduit and fittings is both tough and UV resistant.
Indoor portion could be other material, of course.

Joe