Steel Metal Barrel
Full to the Max
A single-block fluid tank holding 24,000 mB — double the Open Barrel's capacity.

§lOperation§r
    - Both the top and bottom can be cycled between input, output, and off with a Hammer.
    - Accepts any fluid, including gasses.
    - A redstone signal disables fluid transfer entirely while active.
    - A comparator against it outputs a signal proportional to how full it is.