Liquids are loaded/unloaded directly using belts. Sorters cannot be used. And liquids cannot be directly inserted/removed from your inventory. The Storage Tank can store Crude Oil, Refined Oil, Water, Deuterium, Hydrogen and Sulfuric Acid.
Player Tips & Tricks
Liquids are transferred in and out by belt going direct into the tank, not via a sorter.
As of Version 0.6.17.5827, fluids may be placed or removed from the Storage Tank manually. Prior to this update, players could only directly place or remove items from the storage tank via belt.