Attwood Tsunami Mk2 is the only manual bilge pump that eliminates air-locks • Patented X-AirTM Impeller ejects trapped air in the pump and pipework. Tsunami Mk2 is the easiest manual bilge pump to install and service • Backwards compatible hole pattern and motor cartridges of Tsunami Mk1 bilge and aerator pumps. External mounting feet and integrated outlet reduces time and effort. • Service pump cartridge from hard-to-reach areas using only one hand. Tsunami Mk2 is the most reliable manual bilge pump in freshwater applications • 40% better protection against water ingress and electrolysis - VS. Mk1. Details • Flow rate : 500GPH (1893LPH) • Voltage : 12V • Fuse : 3A • Outlet Diameter : ¾” barb (19mm)