1. Cancel the bottom valve valve resistance coefficient is larger, generally can reduce the head of about 1.5 meters. After eliminating the bottom valve, the efficiency of the pump will increase significantly. If you install a pat door in the outlet pipe, then seal the padding box with butter, so that you do not have to fill the water when you stop the pump and start again. 2. Cancel the gate valve and check valve The drag coefficient of the check valve and check valve is relatively large. The role of the gate valve is to regulate the amount of water, but the amount of water of the agricultural pump does not have to be adjusted, so it can be omitted. The function of the check valve is to prevent the water from flowing backwards. After the door has been shot, there is no need to check the valve. 3. Tilt the pump (or divert the pump volute) so that the inlet and outlet pipes are straight in and out of the basin to reduce the elbow. 4. Reduce the loss of pipeline filter Use O.8mm steel wire instead of the filter to increase the voidage of the cross-section and reduce power consumption. 5. Adequate flooding depth of the inlet pipe When the flooding depth is not enough, the water will generate vortexes, bring air into the pump, and reduce the efficiency of the pump. The inundation depth of the inlet pipe during dry season should be greater than 0.5 meters. 6. Avoid the "anti-aircraft gun" type water discharge method Since the outlet pipe is higher than the water out of the pool, the head loss is large. The water flowing from the nozzle will generate reflected waves on the side walls, which will increase the pressure at the outlet and affect the water discharge. 7. The resistance loss of an economic pipe is inversely proportional to the 5th power of the pipe diameter. The smaller the pipe diameter, the greater the resistance. The economic diameter of the outlet pipe is O.65-O.8 times that of the pump flow rate, and that of the inlet pipe is 0.8-0.92 times that of the water flow rate. 8. Remove flow channel plugs in time If impurities block inlet and outlet water pipes, impellers, or flow-through shell flow channels, the amount of water will be reduced. 9. Improve the belt transmission string Note the tightening edge of the belt and the transmission angle of the loose edge. In the use, do not change the wide belt to a narrow belt, and pay attention to the tightness of the belt. 10. Change the mouth ring, adjust the clearance of the axial clearance impeller ring is large, the volume efficiency decreases. Therefore, check the ring gap regularly. The value of axial clearance should be adjusted according to the manufacturer's instructions.