There are a lot of air lines to deal with and the fuse is 11.5 feet long so I try to route them as neatly as possible.
One way to do this is to run them through a tube. I like these cool tubes because they are light heat protective to 600 degrees F and go around corners. Duralite sell these tubes in different diameters and colours.
Please feel free to comment or ask any questions about anything in the Hangar Deck posts.