I've done 12 pints in an hour, 3 yard glasses of ale (5.4%) and a few necked pints.
My stomach is solid for liquids, I neck 4-5 pints of water when I get home from a night out to prevent hangovers so it's used to it.
Surely that much liquid would put you at risk of hyponatremia?
At the very least, it is destroying your kidneys.