Simple washing machine drain hose siphon connector.
You'd also need some simple rubber washer/seal ring to make sure there are no leaks when screwed on top of your drain sewer pipe.
This being a critical part of your house, I'd recommend to print it with PETG filament fro more reliability.
Was going to buy it in the store, but got stuck in traffic jam, so came back home and designed it instead :)
adapter_screw_body.stl | 1.6MB | |
pipe_adapter.stl | 186.1KB |