Fluid Mechanics
From ATLauncher Wiki
From the Universal Electricity site:
As part of the Fluid part of the name this mod is about managing and moving varies liquids as need. To do this the mod adds pipes, tanks, and machines along the lines to do just that. However, as part of the Mechanics name this mod also offers way to do simple mechanical power. Right now as the mod stands its only good to store liquid for use so its recommends to download other mods like Atomic Science, Steam Power, RailCraft or Forestry.