When installing an irrigation system in your garden, it should be properly planned before proceeding to the next step. The plumbing in the irrigation system should be placed at least 3 feet below the ground. Placing it anywhere above this level may result in pipe ruptures, when the ground is dug. This will become a headache when you start planting. There are pipes available in the market that ensure a constant moisture level in the garden. You can either use perforated pipes or a number of exit points for the pipes. Make sure there is never a shortage of water in the garden.