When the power is out you can always depend on the Johnson Pump Viking Thrudeck and Bulkhead hand operated diaphragm bilge pumps. The pump is available in two models for various installation alternatives. It can be mounted behind walls, through deck and under bulkheads.
Features
Viking Thrudeck for installation behind vertical wall or under deck with sealing boot, complete with a cover plate
Viking Bulkhead for surface installation with horizontal lever
The Viking pump can also be used for pumping toilet waste due to the large valve openings