I just made a shower head for outer shower, because the original damaged. I used the original sealing inside of the showerhead. With that is sealed totally there was no sealing issue.
Thread type: 1,25 inch 1 1/4-16UN
Head diameter: 112mm
I printed first with 15% infill but damaged from the pressure, but after i printed with 100% infill there was no issue. I am waiting for test in the garden also.
The author marked this model as their own original creation.