Submersible Sump Pump Water Pump 1/2 HP 4320GPH Cast Iron Steel Basement. 1/2 HP Submersible Sump Pump. A must-have tool for every home! Are you still worried about drainage problems? Look at VEVOR’s sump pump. It is equipped with a high-efficiency copper motor for optimal flow rate and lift performance. Premium materials and sealing structure ensure long-lasting use. The automatic float switch will free your hands. Protect your basement property with our sump pump and eliminate the danger of floods! 1/2 HP Power for Your Pump. Designed Just for You. Efficient & Durable Motor. The 1/2 HP powerful copper motor makes our sump pump maintain long-term quick drainage performance. It features thermal overload protection and low noise during operation. Different lifts correspond to various flow rates. The larger the flow is, the lower the water height required in the pump. So you can choose the proper flow and rate needed. Runs on Its Own. Are you tired of turning the pump on directly? Well, our sump pump comes with a sensitive float switch to allow the pump to automatically turn on/off according to the water level. 28 ft/8.5 m. 10 ft / 3 m.