Been surfing plumbing stuff all night and I found this site with some pretty good eductor info. This guy obviously got a lot of business from RC traffic so he decided to put together an info page.
Edit: Can't spell eductor and not sure if I can edit the title..boo.
Thanks for that link. Now I know what an enductor is, and I know I don't need one. Which is useful, because everytime I hear people talking about something I'm not familiar with I wonder if I should buy one.
Scott, are you working during the day's now? I need to stop by with that bit sometime. I'd like to see eductors in action.
Nate, from what I've determined is that they are good if you have a pretty large tank, but may not work out well for smaller tanks. I don't think I need them.
I have yet to hear back from them. Here is a copy of the pdf spec sheet, please be kind and don't link this on other forums I am hosting it on my own website. These are 3 7/8" in length, not the longer six inch ones.