Sounds like a neat solution Zozo. Some skilful drilling too.Indeed it might... You can also DIY one that might do better. With this, I tested it a few years back as an air venturi and worked a charm.
View attachment 163345
You can drill a very small hole in the hexagonal nut say 1mm or even smaller if you want. Then what i yet have not tested but in theory, it should do even better. Drill this hole in an incline in the flow direction. Than take a larger drill in 4.2mm and drill a 5mm deep hole at 90° on top of the 1mm declined hole. The Hex nut has enough material to it for that. Tape M5 thread in this 4.2mm hole and screw in another 4mmxM5 hose pilar. I used one like this with a O-ring and a clamp nut.
Or use one like this with a drop of Locktite or other sealant on the thread.
And this goes again on the other end with a rubber washer.
It is 10mm internal diameter, which makes it 2mm reduction in a 16/12mm hose. And the 1mm inlet gives a finer bubble.
But as said I didn't test it with an inclined 1mm hole, I drilled it straight and it already worked well as a venturi inlet. Later I thought I should have tried to drill it inclined. with the flow direction. There was nothing to lose to do that anyway. (Well other than snapping a drill if you are not careful.)