1. Look at the unit efficiency

Measure the performance of the water pump, and the power size is not important, but the unit efficiency. In the case of the same raising and the same traffic, the power is high, which means that the performance is good.

2. Ask the merchant performance index

The water pump has the highest raising flow and the labeling method of the rated range flow. Most of the pumps on the market are marked with the highest raising flow. Some manufacturers' water pump markers are outrageous. 80W (up to 10 meters) and 120W (up to 13 meters). In order to get good sales, some merchants changed to 100W (up to 12-15 meters) and 150W (up to 15-20 meters), and the traffic was also scary. There is also a self -absorbing pump. The theoretical suction is 10 meters. Due to the existence of the water vaporization phenomenon caused by the amount of roughness in the pump head manufacturing), the effective suction process of the self -absorbing pump is 8-8.5 meters. But the merchants make these parameters be beyond their imagination to attract customers. Therefore, before buying the pump, you should learn more about the actual parameters of the pump, such as the actual journey and the actual traffic, so as not to cause trouble.