Mini hand water pump. By Maciej Nowak Projects. 8:25 video:
https://www.youtube.com/watch?v=Dhuha3FnXV0
Previously:
https://www.homemadetools.net/forum/...671#post174548
https://www.homemadetools.net/forum/...360#post173292
https://www.homemadetools.net/forum/...986#post171820
