1/2 inch to 1/4 inch NPT Adapter

thingiverse

This user made a 1/2" NPT to 1/4" NPT adapter using OpenScad and the "poor mans screw library." It only took around 10 minutes to design and 30 minutes to print on a MakerBot. They then uploaded the .scad file, which requires the aforementioned screw library, but note that the threads aren't technically NPT as they don't taper. However, it works fine with teflon tape for now. The adapter was printed with 3 shells and 30% infill at a .3mm layer height to ensure water-tightness. The threads fit tightly, but the part leaked slightly during use; a quick dip in acetone resolved this issue. Be cautious not to over-tighten the adapter.