e57, that's a good 'unasked' question. I didn't explain earlier, as my focus was on making bends, and not the choice of material.
This instal is for some preliminary sewage treatment. PVC was chosen (sched 80) because of it's resistance to corrosion and chemicals. Care was taken to route the pipe so as to limit any physical damage.
Which also leads to the choice of the bend to photograph; many of the bends are slight, and might either not really show in a pic, or look 'sloppy,' when, in fact, they were following ripples in the basin.
I've seen the glorified springs sold, but I am sceptical; if nothing else, it's a bit hard to get the necessary grip for a bend near the end of a pipe.
