I have designed a swirl funnel for my trash system behind the printer.

The funnel fits easily over a normal waste water pipe (DN50) with an outer diameter of 50 mm.
You don't need a pipe clamp to attach it.

In addition i designed a adapter pipe witch fit into the inside the funnel.
This makes it easy to remove the funnel to replace the filament in the AMS.

In my setup, the leftover plastic from the printer falls through a pipe into a container under the cabinet. The continuous tube with two entrances allows me to mount a funnel above the printer so that plastic residue can also be thrown into the funnel from above.

You can find the center tube and the mounting plate (magnets 8x3mm) under the following link:
https://makerworld.com/models/177770