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Old 03/20/2021, 09:12 AM   #3
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Join Date: Feb 2010
Posts: 16
I found the original picture of this venturi I posted a while back to this forum. The stock normal venturi for the needle wheel pump had about 1/3 of the inlet area at the throat.

This venturi type has an air cavity inside the wall of the pipe that supplies air to the small holes you see in the picture. Making this a perfect 3d printer project.

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