Venturi Generator for 1/2 vinyl tubing

There's quite a few of these on here but this is my take on a venturi generator for 1/2 inch vinyl tubing. I believe vinyl tubing has an upper limit of 28hg. The engineering I am sure could use some work.

*edit* V2 Increases the angle of the exit side.

* edit 11/13/17* A user has mentioned that the effect is not great enough to pull water into the tube when hooked up to their air compressor. Please let me know if you know the math behind why and what may need adjusting.