No matter what I've tried so far, I just can't get these things to work. Gas pumps produce a small vacuum, which continuously starts and stops their operation. The gas pipes always show as empty, except sometimes when I first connect a pipe. Someone suggested here I build a small room with just a pump and an electrolyzer, which I did. Still no luck. I've tried medium size rooms, large rooms.
Here's a pause where you can see my electrolyzer is at 'max gas pressure', the gas pump is in a