Attwood® Tsunami MK2 12V Electric Bilge Pump. What makes Tsunami Mk2 so innovative is the patented X-Air™ Impeller. Its engineered performance forces air bubbles trapped in the hose and underside of the pump out of the pipework, so that the pump will not run dry and burn out. 40% better protection against water ingress and electrolysis v.s. Mk1. 90 degree rotatable elbow outlet allows users to install the pump anywhere in a full 360 degree orientation. The single-hand pump cartridge release is convenient when trying to access a pump located in a hard-to-reach area of the boat's hull. Automatic activation. 29" wire length. Diameter: 3/4" to 1" barbs.