Automatic bilge pumps with Built-in switch. Removal of the motor cartridge allows for easy cleaning of the strainer and impeller in the event that the pump becomes clogged with debris. Electric Submersible Pumps are by far the most popular type of electric Bilge Pumps, submersibles give very high outputs, are cost effective, have low amp draw and are easy to install. Bilge pumps are designed to exhaust standing water only. They are not intended to prevent rapid accumulation of on-board water due to rough weather, hull damage, and/or other unsafe navigational conditions.