The GARDENA Tap Fitting 4.6 mm (3/16 is connected to a water tap to form the starting component of the Micro-Drip-System. After attaching the tap fitting, you can join a 4.6 mm Supply Pipe or Drip Irrigation Line to connect it to a Master Unit 1000 (Art. No. 13333-20) or Master Unit 2000 (Art. No. 13310-20). The adapter is also suitable for connecting it to a cistern tap in order to use the contained water for the Micro-Drip-System. Thanks to the Easy & Flexible connection technology, you can effortlessly attach the component to the tap, expand it flexibly and detach it easily.