TSUNAMI 800 GPH Bilge Pump. The easiest, most reliable non-automatic bilge pump ever designed! The airlock impeller ejects trapped air in the pump and pipework - preventing pump burnout. It has 40% better protection against water ingress and electrolysis. There is compatible mounting patterns with leading pumps - no new drill holes require. An external mounting feet and intregated outlets which simplify installation and use. Replace the pump cartridge from hard to reach areas with only one hand and without touching plumbing lines.