A cut version of a gardenhose adapter with the srew part. Originally built for the Aldi Süd Urlaubsbewässerungssystem which is basically the same as the Gardena thing which itself basically is a pot with a lid, a pump and several micro drop hoses. I automated my automation system by refilling the pot with an standard garden hose with a garden/watering computer. This way, I can irrigate a lot of plants with one single system and even let it run multiple times a day, since it gets refilled everyday anyway. Just put a 26.5 - 27 mm hole in the top, stick the adapter in from the bottom and screw on a gardena male screw piece on top of it. Might need some teflon tape for tightening the connection. Has some space for additional O-Rings between lid and screw adapter.

Update: The second print profile contains a completely new model with the correct thread that peerfectly fits into my other gardena adapters. The original remodel fits nicely in injection molded pieces that are available at garden stores, but the thread is just this tiny bit too different for the BSP ¾ inch G14 pipe threads.