Talk:Red Power 2 - Pneumatic Tube Tutorial/@comment-86.30.230.147-20120807092701/@comment-67.161.248.252-20120817160626

Restriction tubes, as far as I've heard, prevent items from flowing down them until there are no other options.

For instance, pneumatic tubes will try to throw an item in the nearest inventory- Restriction tubes act as if that tube is 5000 tubes long, if I remember right- which means that it should always choose a different tube unless the restriction tube is the only valid choice.