Jabsco Fish Box Evacuation Pump - 24VDC 5GPM Diaphragm w/1.5" Fittings [50900-1100]Fish Box Evacuation Pump 24VDC 5GPM Diaphragm w 1. 5" Fittings The fish box evacuation pump is perfect for emptying a fishbox after a day's fishing. Typically the fish box is not only used for storing the days catch but very often is used for a cooler for supplies. This means that there can be all manner of debris left in the bottom of the fish box at the end of the day. This self priming pump is designed for passing typical debris, such as bait