https://en.m.wikipedia.org/wiki/Venturi_effect
This wiki explanation has a picture of one. That one looks fragile by design. I know the one I used was some type of tube in a tube with a nipple on the side for the hose.
I know I could just try. I don't have time to r.n.d.
I don't need it to be pretty. I just need it to work well.
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