Submersible pump hose adapter / Embout tuyau pour pompe vide-cave

This a hose adapter for a submersible pond. The original one was cut to adapt to a larger hose diameter, but I needed to use my 19mm garden hose.
The thread on the pump is about 42mm diameter.
I used the very handy OpenSCAD [threads](http://dkprojects.net/openscad-threads/) library. I also used some parameters from the [ISO metric threads](https://en.wikipedia.org/wiki/ISO_metric_screw_thread) definitions.
The source file is attached, you can use it to adapt to your needs if necessary.
The S