Great post, learn a lot from it. Some questions: Also, there are several other entities that can interact with liquids: - mining drills with sulfuric acid (200 capacity, -100..100 pressure) - assemblies, chemical plants, oil refineries (input/output - same mechanic as with pump (speed? - untested ye...

Actually, if I understand Factorio liquid physics correctly, inserting a single pipe segment between two pumps should not affect pumping speed. Pump moves 200 liquid per tick, which is exactly a pipe volume, so everything *should* run smoothly. No, volume of a pipe is 100. [Fluids, Pipes and Pumps]...