There are storage tanks for liquids, they're called Dynamic Tanks. They work a little bit like the Iron Tanks you can make in FTB, so you have to build a 3x3x3 structure to hold the liquid. There are three parts to them:
Dynamic Tank
Dynamic Valve
Dynamic Glass
My problem now is, how on earth do you get the liquid out again? I've tried everything. Simply attaching a mechanical pipe doesn't work, nor does attaching an electric pump. i've even tried moving the valves about on the tank, still nothing coming out of the tank :(