【DURABLE MATERIAL】- Made of 304 stainless steel and a built-in check valve, the submersible well pump is rust- and salt water resistant, and thus highly durable and waterproof for long time to use. 【ESSENTIAL PARAMETER】- Submersible Pump Voltage: 110V 60HZ; Pump highest head: 164ft; Pump flow: 25.5GPM; The length of cable: 49.2ft; Applicable Well Diameter: >100 mm / 4 inches; Power: 370W / 0.5HP; Pump impeller: 5 PCS. NOT require an external control box! 【HIGHER PUMP HEAD & FLOW】- Powerful flow of water well pump can achieve 25.5 GPM and the highest head can reach 164ft. More convenient and efficient to use water. Heavy-duty thermoplastic impellers design provides high flow up and high head, for better performance and longer life. 【EXCELLENT PERFORMANCE】- Stainless steel body, a built-in check valve(unsealed), can be mounted vertically, Industrial grade heavy duty, also good for home usage. High efficiency, hermetically sealed motor is thermally protected to prevent overheating, and uses less energy. 【WIDELY USED】- This deep well pump is suitable for extraction from the deep wells for groundwater, and also uses in rivers, reservoirs, canals and other water lifting works. Mainly used in farmland irrigation and mountainous areas for human and animal using water, but also for draining in cities, factories, railways, mines.