The classification of pumps is as follows:

1. According to the working principle: centrifugal pump, axial flow pump, mixed flow pump, positive displacement pump, sewage pump, etc.;

2. Divided by use: fire pump, oil pump, circulation pump, sewage pump, dosing pump, etc.;

3. According to the structural characteristics: single-stage pump, multistage pump, pump with humidifier, self-priming pump, etc.

In short, there are many classifications of water pumps, and some details are classified according to the actual needs of users.