Product instructions The new Venturi fertilizer injector is installed in parallel with the water supply control valve at the entrance of the irrigation system of the irrigation system. When in use, the control valve is closed to form a pressure difference between the front and rear, which can make the water flow through the throat of the Venturi fertilizer injector. Inside the tube, there is a flow channel guide device, which is designed with two taper nozzles. When pressurized water enters the throat pipe, because the pipe diameter is rapidly reduced, the flow velocity will increase rapidly. When the water flow passes through the inlet pipe opening at the maximum speed, a water jet is generated around the jet water column. In the negative pressure zone, the fertilizer solution is evenly sucked into the pipeline system from the open fertilizer bucket for fertilization. When installing, the water flow direction should be consistent with the arrow direction on the fertilizer injector, otherwise it will not normal work. The control valve on the main pipe should be able to be adjusted slightly to achieve a proper working state. When installing, make sure that the connection part does not leak, otherwise it will affect the normal operation of the fertilizer injector. Item details: Name: Venturi fertilizer Kit Connection Size Type 1",1.5",2" Male Thread Max fertilizer suck rate : 300~1200 L/H Max water flow rate: 9~20 m/H Working Pressure 0.5 ~ 9.5bar FeatureControllable, adjustable fertilization, uniform fertilization ApplicationDrip irrigation,Sprinkler irrigation Fertilize