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