Venturi Ejector

thingiverse

Made a simple venturi vacuum pump for changing fluids in vehicles and other things. The hole in the base of the venturi is the pressure inlet, the hole in the side is the vacuum inlet. No clue what kind of negative pressure it makes but it has enough flow to fill the glass jar with water in seconds. Also not sure what kind of inlet pressure it can take, I don't think I ever went over about 4 bar inlet pressure and that was plenty. Pressure inlet is 11 mm and the other holes are 12,5 mm cause that was the size pipe I had. Flange sits under the lid, everything is glued with epoxy. Should use a larger jar than the one I found. Also, I hope it has enough vacuum to bleed car brakes, if anyone prints and tries it out, please comment.