1. The Venturi applicator is installed in parallel with the water supply control valve at the entrance of the irrigation zone. When in use, the control valve is partially closed to create a pressure differential across the valve. This allows the applicator to draw solution into the water supply line. 2. Uses vacuum suction generated by water flowing through the Venturi tube to evenly draw fertilizer solution from an open container into the irrigation pipeline. Enables simple, convenient operation. No external power required when solution concentration is stable—saves time and resources. 3. Select the appropriate fertilization device based on crop type and irrigation area. Oversized or undersized units may reduce fertilization efficiency. If uncertain, choose a smaller unit and install it in parallel with the main line using the included spreader kit. Adjust the valve to regulate water flow and achieve desired fertilization rates. Extending application time helps achieve target nutrient delivery. 4. Install the spreader in parallel with the pipeline. 5. Ensure water flow direction matches the arrow indicator on the device; incorrect orientation will impair performance. Use the ball valve on the monitor for fine-tuning operating conditions. Ensure all connections are airtight during installation—air leaks will disrupt proper spreader function. Color: Black Material: Plastic Size: 3/4 Inch Package Contents: 3 × Spreader Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.