Irrigation tools are a little like the Swiss Army knife of lawns and landscaping. There are three main types of irrigation tools: Surface irrigation tools like sprayers or watering cans are used for overhead watering systems. Sprinkler heads and pop-up heads are used for underground watering systems. You can also use these to create overhead watering systems. Drip irrigation tools like connectors, piping, and sprinklers are used to create overhead watering systems and underground ones!