I looked into this a while ago and didn't understand why the efficiency claims were so different, but here's a video of a RO system running https://www.youtube.

I looked into this a while ago and didn't understand why the efficiency claims were so different, but here's a video of a RO system running https://www.youtube.com/watch?v=2r_T7Bgi3hQ https://www.youtube.com/watch?v=2r_T7Bgi3hQ