Wide Application: This marine bilge pump, capable of rapid and continuous drainage with an automatic on/off function, can be used for fishing boats, kayaks, and motorboats to prevent excessive submersion of the hull, ensuring the security of personnel, equipment, and cargo. It is also suitable for basements as a backup sewage pump to discharge rainwater. Sturdy and Durable: Our automatic boat bilge pump features a pressure-resistant, corrosion-resistant ABS747 waterproof housing, reinforced switch, clog-resistant filter base, and anti-fouling impeller. These features ensure it stands the test of time, no matter the conditions. High-Quality Motor: Crafted with copper wires for conductivity and a stainless steel shaft for corrosion resistance, our bilge pump motor runs quietly and efficiently and lasts long. The motor's sealed waterproof housing further protects it. With an insulation class of B, the motor is protected even during prolonged operation. Automatic On/Off: When the brown-white wire is connected to your battery's positive pole (+) and the black wire to the negative pole (-), the boat bilge pump enters an automatic on/off mode. When the water level rises above the filter bottom by 1.6-2.0"/40-50 mm, the pump automatically starts draining. When it drops to 0.8-1.2"/20-30 mm above the filter bottom, the pump automatically stops working. 1100 GPH High Flow Rate: Our automatic bilge pump is equipped with a 6600 RPM high-speed copper wire motor, an efficient drainage anti-fouling impeller, and a 1.1"/29 mm diameter outlet pipe. It can swiftly drain water up to 1100 GPH, reaching 13.1 ft/4 m away!