As a test to see if I can compact a fuel production line in Galacticraft, I tried using tank robots to move the gasses (which are actually fluids and can be piped) around. Seeing that a bucket of gas isn't a thing, I used IC2's universal fluid cells to specify what goes where. This only seemed to work for water and fuel. Switched to diamond fluid pipes and got the same issue. Not sure if it's Buildcraft or Galacticraft not doing something right, but posting here first.