Gardena hose adapter for IBC tanks with a specific thread size of M80x3.
Designed to be FDM-printer friendly. The seal with the tank is good, but water seeps through the plastics layers, so it's better to shut down the main valve when not using the adapter.
It needs to be printed with the Gardena part on the bottom(!) to ensure a smooth top layer where the part will seal the IBC tank connector. I added supports in my Print Profile to make sure it doesn't fall over.