Soldering nipple AG 4243G : Amazon.de: DIY & Tools
Amazon.com: 28PCS 1/2 in Drip Irrigation Fittings Kit, Irrigation Tubing Parts, Barbed Connector Include 10 Couplings, 6 Tees, 6 Elbows, 6 End Caps, Drip Line Connectors for Garden Drip or Sprinkler System :