How to Build an In-Line Sprinkler Fertilizer System

Using a sprinkler system to deliver fertilizer directly to plants and grass is one of the easiest ways to ensure that important nutrients get applied evenly. Delivering a steady, uniform amount of fertilizer through the water supply can help grow stronger roots and lush, green lawns. Building your own in-line fertilizer system is relatively easy, and requires only a few tools. In-line fertilizer systems can be used on lawns of any size, and can be added to existing sprinkler lines.

Automatic fertilizer attachment
Fertilizer
Wrench

Instructions

- 1
  Locate the sprinkler manifold. This is usually outside and contained in a green and black box.
- 2
  Open the sprinkler manifold box using your hand.
- 3
  Twist the test caps on each valve within the sprinkler manifold to determine which zone you want the automatic fertilizer to be attached to.
- 4
  Turn off the main water valve.
- 5
  Use a wrench to remove the supply line from where it attaches to the valve where the in-line fertilizer is to be attached.
- 6
  Connect the end of the supply line to the output side of the automatic fertilizer device.
- 7
  Screw the intake side of the automatic fertilizer device onto the sprinkler valve.
- 8
  Fill the automatic fertilizer with a quality fertilizer that's designed for use in your model.
- 9
  Turn on the main water line.
- 10
  Run the sprinklers and test for leaks.

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