High-efficiency submersible water pump with 1HP powerful motor supports to complete any drainage work in a short time. Designed for draining clean or slightly dirty water from flooded house, basement, sumps, window wells, water tanks, pools, cisterns, hot tub. Fully corrosion-resistant casing and environmentally friendly thermoplastic construction ensure the stability and solid of the sump pump. S more, the highly corrosion-resistant impeller and overheating protection ensure a long service life. Unique water sensor switch with non-return valve drains water to the lowest suction level of 0.1inch without back flow. The automatic sump pump is equipped with adapters suitable for 1inch discharge hose and GHT 3/4inch garden hose. You can use different sizes of hoses depending on the flow. Auto & Manual Mode. Design with the built-in float, this submersible sump pump can work manually or automatically according to the actual need. With a simple switching button, you can freely switch between these two modes. Before using the electric water pump, submerge this pump into the water at an inclined angle to remove excess air. Do not use power cord to lift motor. Once the pump can not pump any water, you should cut off the power immediately to prevent the coil from getting burned.