I tried using ic2 with integrated tunnels to transport fluids around and noticed it doesn't work. So I started to wonder, how does ic2 handle fluids? Does it use some kind of fluid api provided by forge or does it have its own system? Since buildcraft is out for 1.10 I'm looking for fluid pipes and the ones I picked just don't work. The problem most likely is, that ic2 machines such as tanks and pumps just aren't recognized as containing a fluid tank in them and so they aren't working. I did have to use EnergySynergy to get the pipes to transport ic2 compatible energy because it only uses capabilities, not interfaces as I was told ic2 uses. I think the fluid incompability has a similar cause.
EDIT: Seems I got the wrong subforum, should be in IndustrialCraft² not here. I thought General Discussions was a subforum of IndustrialCraft²