SP Stainless Steel Deep Well Pump (hereinafter referred to as the pump) is a new type of water-lifting machinery, made with mature and advanced processing technology. It is equipped with a submersible motor to replace the traditional long-axis connected deep well pump, and can be completely immersed in a certain depth of liquid to work. It has the characteristics of compact structure, excellent performance, high efficiency and energy saving, small size, light weight, stable operation, easy use and installation. The pump is equipped with an elastic ball check valve to prevent the pump from being impacted by shutdown backflow and pipeline water hammer.