Shop set up

[fujimo]

going down in diameter increases the friction, same as irrigation.
keep the pipes as big as you can, then have the constriction nozzle right at the end.

 i run 8" pvc for my main overhead trunking, with 6" drop lines- all going through 2x 45 degree bends- keep the bends wide!, and then they neck down to the machine size right at the machine, also use 6" gate valves.
 dont forget the static electricity wire !! that is grounded to the dust collector and each machine

[Eric Krewson]

If I am grinding bamboo on my belt sander I can stop up a 4" suction hose with fuzz. The fibers are like coarse cotton and hang up on the ground wire inside the pipe. I wouldn't attempt to run my equipment on a 2" hose.

[fujimo]

Eric, here's a trick the folk at ClearVue taught me.
 i also used to run one copper wire inside, and one spirally outside, and using pvc pipe they are critical, but a pain when everything hooks on them, all one needs is a spiral wire on the outside, and a small self-tapping screw every two feet or so, that is attached to the wire in the outside, and only just penetrates the wall through to the inside, to de-energize any static on the inside. i run the screw in, then back it out and grind the point nice and round, then run it back in.
i guess one could put as many as made a fella feel safe, but they told me one every 2' was more than enough. those wires would drive me crazy snagging everything, especially where they are on the inside of the curves and bends.