Pump out excess freshwater and lighten your boat's load with the easiest, most-reliable bilge pump around the Attwood Tsunami MK2 Bilge Pump! This manual bilge pump from Attwood is unique because it eliminates air locks with its X-Air Impeller. Its engineering forces air bubbles trapped inside the hose or other pipework out, so the pump will not run dry. This technology enhances performance and reliability. Flexible, rotatable, 90 elbow outlets make this bilge pump easy to install. The single-hand pump cartridge is great when trying to access a confined or hard-to-reach pump. Pump out excess freshwater and lighten your boat's load X-Air Impeller eliminates air locks Flexible, rotatable, 90 outlets for easy installation Easy-access single-hand pump cartridge