Pump flow. The user considers the amount of water required for the cultivation, breeding, processing, and living of the yard and the conditions of use of the water source. If the water supply is sufficient, the pump flow rate must be determined based on the maximum water demand. Be sure to match the flow rate of the selected pump with the water requirement and the water source conditions. Pump head. The pump lift should be greater than the actual water delivery height. Under normal circumstances, the selected pump's head wxb series should be 20% larger than the actual head; the wq series should be 10% larger than the actual head. Otherwise, it will be difficult for the pump to pump water. Power supply. The motor voltage for the three-phase power supply is 380 volts; the motor voltage for the single-phase power supply is 220 volts. The general household lighting power supply is 220 volts. Therefore, it is more economical and convenient to purchase a micro pump with a 220 volt power supply. Installation size matching. If the WQ series micro submersible pumps are selected, it should be noted that the maximum outer diameter of the pump should be smaller than the inner diameter of the well bore, otherwise it cannot be installed in the well. If wxb series micro-pumps are selected, it is necessary to consider the feasibility of well assembly (direct port pumping, original pumping pumping, manual pump pumping, etc.).