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 closed, creating a pressure differential that allows the applicator to draw fluid into the water supply line. 2. Utilizes the vacuum created by water flowing through the Venturi tube to evenly draw solution from an open container into the pipeline for fertilization. This process requires no additional power when concentration is stable, saving time and resources. 3. Select the appropriate fertilization device based on crop type and irrigation area. Installing a unit that is too large or too small may reduce fertilization efficiency. If uncertain, choose a smaller size and install it in parallel with the main line using a spreader kit. Adjust the valve to regulate water flow and extend fertilization duration as needed. 4. Install the spreader in parallel with the pipeline. 5. Ensure the direction of water flow matches the arrow indicator on the device; incorrect installation will prevent proper operation. The ball valve should be adjusted to fine-tune system performance. Ensure all connections are airtight during installation, as air leaks can impair spreader function. Color: Black Material: Plastic Size: 1/2 Inch Package Contents: 3 x Spreader Note: Light reflection and display differences may cause slight variations between the item color in images and the actual product. Measurement error allowance is +/- 1-3 cm.