UPDATE: Inside pie-shaped part broke after a week (~5 loads). Currently testing a new one with a wider and taller pie section. Will update with its performance later and re-upload if it holds up.
Printed in nylon with support material as shown in one of the photos. I recommend you add grease to the inside prior to putting it back on the shaft so the shaft can turn freely until it engages the impeller. Make sure the new impeller is securely in place before reinstalling the drain pump
The parts has been through several loads now without failure. Will update if it eventually breaks.
Model designed with FreeCAD.
The author hasn't provided the model origin yet.