Join Date: Jul 2006
Location: Traverse City, Michigan
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I may be wrong, but that seems very similar to a Venturi for an ozone kit on a hot tub. Of course in the case of the hot tub its a gas that its merging but it may still work for this purpose. The below is just the first link I could find.
I haven't posted enough to add a link but if you google or try spadepot.com you can see some examples and the seem to be going for $20 to $30.