This is a remix of the great Spray System by schiffer-soft. I have change the output-nozzle and delete some parts to print it easier. 90, 180, 360 degrees are available. The other parts like midsection and groundholder you can find in the original linked Post.
O-Ring can be a little bit smaller, i used a 8mm inner diameter O-Ring at the bottom, if you srew it in. works fine. You can print the O-Ring in TPU, see here:
https://www.printables.com/de/model/466301-simple-customizable-o-ring-sealing-ring-for-a-lot-
The author remixed this model.