How to Install a Drip Irrigation System.
Step 1: Connect Tubing to Water Source
Use an outdoor faucet or water valve to connect the water source to the main water line tubing. Connect the two with a backflow preventer valve to stop contaminated water from leaking back into the initial water source.
Note: In nearly all cases, an anti-siphon valve (a combination valve and backflow preventer) is recommended for most home irrigation systems. However, there are strict local codes to follow when using these valves. Check your local code for installation guidelines before you begin.
Step 2: Distribute Tubing Line and Connect Emitters
Once the water source is connected to the main water distribution line, it is time to lay the tubing in accordance with your garden layout.
Roll the tubing out around the garden beds, laying the line flush but not too taut. Once the tubing is in place, use a punch tool to make a hole in the tubing line wherever an emitter goes. In most cases, position your emitters so they are close to the root zone of each plant. To punch the holes, use boiling water or a hair dryer to heat the tube, which makes it more pliable.
Once you have the tubing laid out and your emitter holes punched, secure the tubing into the ground with tubing stakes (which should be the same size or just slightly larger than the tubing circumference).
Step 3: Test the System
Before you turn on the system and bask in the glory of all your hard work, you may want to make some adjustments. Before closing the tubing with clamps, leave all of the tube ends open to test the system. Turn on the water and allow it to run freely for a few minutes to flush out any dirt or debris. Once you see the system runs properly, close the tubing with an end cap.