Fully automatic bilge pump Get rid of accumulated water in the bilge in no time with the Seaflo Auto Bilge Pump. This submersible bilge pump is fitted with a stainless steel shaft and a heavy duty motor with an impact resistant ABS housing. The best part, it's fully automatic! No separate float switch is needed and no power is used until pump turns on when water rises. This pump is available in 600 and 750 gallons per hour flow rates - perfect for general use. It's comforting to know that if your boat takes on water you can pump it out fast. Installation Instructions When the brown white wire of the auto bilge pump is connected to the battery's positive (+) terminal, the black wire is connected to the battery's negative (-) terminal, the pump has automatic function. 1. When the water level rise above the bottom flay surface of the strainer 40-50mm, the float switch's contact point is connected then the pump works. 2. When the water level dropped to 20-30mm above the bottom flat surface of the strainer, the float switch's contact point is disconnected, the float switch stops working, and then the pump ceases to work meanwhile.When the brown wire of the auto bilge pump is connected to the battery positive (+) terminal, the black wire is connected to the battery's negative (-) terminal, this pump is same as the ordinary bilge pump and has no automatic function. Highter voltage will damage the pump.