The underground drip pipe with a diameter of 13.7 mm is installed invisibly in the ground and is used for the irrigation of border plantings and lawns. Drippers are built into the pipe every 30 cm, each delivering water at a fine dosage of 4 l/h. The drippers are self-closing, ensuring they do not become contaminated after decommissioning. To prevent roots from penetrating the underground pipe, the drippers are equipped with a root barrier. With a centrally mounted base unit, the drip pipe can be extended with an expansion set, with a maximum total length of 200 meters. The water pressure is uniform at every point along the drip pipe to ensure even irrigation. The drip pipe is delivered fully ready for connection with the base unit 1000, an end piece, and a T-piece.