Blaster Washdown Pump. The Blaster is perfect for tough washdown applications, such as fish box, scaling, and anchor chain cleaning. These rugged self-priming pumps deliver high lift, can run dry without damage, and wonÆt overheat with extended use. Pumps are ignition protected and switches are sealed against water damage. 3.5 GPM, 6.0 Max Amps, 12VDC, 45 PSI