How much pressure do boost and jettison fuel pumps produce?
I looked up a cannister boost pump and jettison fuel pump on the Eaton website and found a cannister boost pump for the 747 that puts out 28,000 Pounds Per Hour, and a jettison pump also for the 747 that puts out 40,000 PPH.  Safe to say jettison pumps generally have a higher output than engine boost pumps, for obvious reasons.