1. When using the Discount Proportional Injector Pump material, make sure that the container for the liquid additive is not empty.
2. Air release valve: At the beginning of starting the proportional pump, the air release valve of the Discount Proportional Injector Pump should be pressed down for a few seconds to exhaust the existing air inside. There will be a little water flowing out during this process. After exhausting the air, quickly close the air release valve.

3. Before the Discount Proportional Injector Pump material is adjusted and injected with fertilizer, please turn off the water supply switch so that the pressure in the pipeline is zero.
4. During installation and use, ensure that the water inlet end of the Discount Proportional Injector Pump must be equipped with a filter device.
5. If the working resistance increases during the use of the Proportional Pump, lubricating oil should be added to the piston part to increase the service life.
6. Clean the Discount Proportional Injector Pump material with clean water after use, so as to achieve the purpose of cleaning the fertilization pump, thereby reducing corrosion and prolonging the service life of the proportional pump.