1/2" to 6, 8, 10 mm tube adapter

Used this for a water pump

Important to know.
It is almost impossible to print items that are really watertight. It must be expected that a few drops get lost. Luckily the extreme small holes get closed by itself over the time. Maybe by dirt in the water or whatever. Se the picture.

I grind the insert adapters a bit to flatten the surface on the sides for more precise fit.

To get it quite OK, you may increase the shell thickness in the slicer. I did from 2 to 4 layers.

More info about that you find here :
https://help.prusa3d.com/article/watertight-prints_112324

May you like also my other watering projects:
https://www.thingiverse.com/thing:6061554 (tank adapter)
https://www.thingiverse.com/thing:6619348 (t-adapter)
https://www.thingiverse.com/thing:6128733 (that one is older)