Quite agree with this:
< 3 LPM = low flow
3-6 LPM = moderate flow
> 6 LPM = hi flow
Don't know why people would define "high and low" flow without listing a flow rate. I would also say 8mm and under would be "small tubing" and I would also put 11mm and up as "big tubing".
I am not sure Cathar is so universally liked; that's one of the things that spawned this cluster**** of a thread after all
