Technology 1976
The first manifold appeared 1976. This manifold replaced the technology with central material-lines which along the maschines. The principle: 1 line from each source to the manifold and 1 line from teh manifold to each receiver was realized for the first time.
The manifold (Flex-Hoses) is a worldwide standard since the 80s. There hasn't been am alternative to this manual system. Additions like Pourching or Codification are not wise and pricey.
Advantages
Little investment
Simple manual material selection
Disadvantages
Electrostatics in the flexible pipes
Purging, material preselection is expensive
Requires a lot of space