The Below and Above Ground Drip Irrigation Line with a diameter of 13.7 mm is installed underground where it is not visible and serves the irrigation of bordering plants and lawn areas. The drip head spacing in the pipe is 30 cm, each head gently waters 1.6 l/h. The drip heads are self-sealing so that they do not dirty after being put into storage. The drip heads have a root blocker that prevents roots from entering the installed, underground pipe. The water pressure is the same at every point in the Drip Irrigation Line, to ensure even irrigation. With a Master Unit fitted in the middle, the maximum Drip Irrigation Pipe length is 200 m. The Drip Irrigation Line is the Extension Set for Art. No. 1389-20; it is supplied with a Connector and an End-piece, and is 50 m long.