From 1965 to 1982, the NYFD had the most powerful pumper in the world.
It could hook to eight hydrants, or 12 in supply, and pump 10,000 gpm at low pressure and 8,800 gpm at 350 PSI.
The tender has an 8 inch cannon that could move 10,000 gpm up to 600 ft.
Three satellite tenders had smaller cannons.
The whole story here.