How to Install a Drip Irrigation System

Drip irrigation is the most efficient way to keep a garden thriving because it eliminates the waste associated with overhead spraying. By delivering water directly to the base of your plants, you minimize evaporation and prevent the foliage dampness that often leads to fungal diseases. A well-installed system essentially turns your garden maintenance into a 'set it and forget it' operation. Getting this right requires planning your layout before you cut a single piece of tubing. The goal is to balance pressure and volume so that the plant at the end of the line gets just as much water as the plant nearest the faucet. Focus on creating a clean, logical network of lines that can be easily accessed when it comes time to mulch or expand your garden beds.

  1. Protect Your Water Supply First. Attach the backflow preventer directly to your outdoor faucet to prevent contaminated water from siphoning back into your home's water supply. Follow this with a filter and a pressure regulator to ensure your system doesn't blow out under high residential water pressure.
  2. Map Your Water Highway. Unroll your half-inch poly tubing along the edge of your garden beds, keeping it as straight as possible. Use landscape stakes to hold the tubing in place every three feet so it doesn't shift when you begin adding emitters.
  3. Branch Out Your Lines. Cut the main supply line where you need to branch off to reach different plant clusters. Insert barbed fittings into the ends of the tubing, pushing firmly until the barb is fully seated inside the hose.
  4. Target Each Plant Exactly. Use a specialized hole-punch tool to puncture the main supply line exactly where you want to place a plant. Snap or screw your dripper emitters directly into these holes.
  5. Extend Water Where Needed. If a plant is further away from the main line, connect a smaller quarter-inch 'spaghetti' tube to the emitter. Run this small line to the base of the plant and secure it with a support stake.
  6. Purge the Lines Clean. Before capping the ends of your lines, turn on the water and let it run for two minutes to flush out any dirt or plastic shavings that may have entered the pipe. Once the water runs clear, install end caps on all line terminations.