Every recipe that produces Empty Fluid Tank, compared at 100% clock speed on a single machine.
Only one recipe is built for Empty Fluid Tank: “Empty Fluid Tank”, 60.00 items/min per Constructor. But 4 other recipes shed it as a byproduct, and “Unpackage Nitrogen Gas”, making Nitrogen Gas, alone gives 60.00 items/min. Count what the factory already spills before building a line for it.
Rates per minute are given at 100% clock speed. Solids are shown in items/min, fluids and gases in m³/min. Output per MW compares the step on its own; it excludes the power used upstream and by extraction.