Summary

This is adapter for 3/4" standard water pipe to 30 mm diameter pipe, that I use in my projects.

Instructions

Print with high quality (I printed 0.1 mm per layer) to get fine female thread.

This part designed to be used with 3 types of vacuum sources:

Hair dryer (to use with hair dryer - go and print adapter http://www.thingiverse.com/thing:39754)
Channel fan (to use with 100 mm channel fan - go and print adapter http://www.thingiverse.com/thing:39753)
12V DC Motor turbine (to use with turbine - go and print turbine itself http://www.thingiverse.com/thing:39755 - it already have connect diameter of adapter in cover).

If you don't understand why this adapter needed and why so many vacuum sources were developed for it (both turbines and adapters) - I attached last image with device where it can be used (if you still don't understand how it can be used - then probably you don't need it :)

Note: if you want to print directly from .STL file you'll need to flip Y-Z planes to place thing correct on printing table.

Enjoy and have fun! ;)

3/4 inches water pipe to 30 mm pipe adapter