vinyl or polyurethane tubing?

[fodupos]

i bought a tank and sump used and i am reworking the return for my sump. i want to use plastic tubing to move most of my water instead of tons of 90's and gluing pipes together. is there a difference between vinyl and polyurethane for this purpose? i know they say to use one instead of the other for refrigerator water but i wasn't quite sure why.

thanks
josh

 

[Conesus_Kid]

I would recommend using Spaflex if you want to avoid using rigid PVC. You can usually find it at pool supply houses, or at www.savko.com.