Portable air compressor - video

Portable air compressor. By Make it Extreme. 12:34 video:

https://www.youtube.com/watch?v=ZlFc0hekuSk

Hummm, can't see how that can be drained to remove condensed water from the tanks effectively, I scrapped too many siphon tube fitted receivers due to incomplete draining and subsequent corrosion, only direct lowest point drains for me these days.