CAUDAL, one of the largest pipe producers in Spain, started to produce Sub-Surface Drip Irrigation Pipes in Spain. Within this context, CAUDAL, who is aware of the successful SDI applications of Geoflow Turkey, invited us to Spain to share our experience and technical knowledge. During the 3-day meetings, we had many fruitful meetings about Sub-Surface Drip Irrigation System. We would like to express our thanks to CAUDAL Group.