Given long enough, all the water in the world.
Gray cast iron is around 118 grams per cubic inch.
Given enough time the entire ocean could be pumped through a half-inch pipe.
A lot
Depends on the diameter of the pipe and the speed at which the water travels through it.
So we can see how much the water is up to so if we know if it is high or low approximately how much it is compare to the steam iron.
300 gallons per minute
question cannot be answered because it depends on the water pressure
None. A square inch has no volume.
orange tacos
Depends on what's flowing (gas or water or something else) and under how much pressure.
The amount of iron in water can vary depending on the source. In natural freshwater sources, it is typically less than 0.3 mg/L. Higher levels of iron in water can result from industrial pollution or corroded pipes in the distribution system.
Iron in the water. Often called that when the content of iron is too much for one to tolerate.