Installing an automatic irrigation system for the grass means you gain in comfort, save water and be able to water the whole meadow in a homogeneous way. This first part of the video describes the elements needed to build the irrigation circuit (water intake, solenoid valves, programmer, pipes, sprinklers and dispersers) and explains how to decide how many emitters are to be installed and where to locate them. Then, an irrigation head (step valve, filter and solenoid valve) is installed step by step.