For some reason my drain hose connection on my dehumidifier is not threaded for a garden hose. It is a 3/4" male NPT. I tried loading it up with teflon tape and it worked until something bumped it.
I couldn't find an adapter that wasn't over $10. So I generated an STL of a ¾" FNTP and an STL of a ¾" MGHT and stuck them together in TinkerCAD.
Print PETG hot at 100% infill to minimize leaks. This is a gravity drain that isn't under pressure. Coat it all around with spray paint to really help seal it.
The author marked this model as their own original creation.