Parametric BSP drain pipe adapter

Adapter to make it possible to attach modern plastic drainage pipes to an authentic, old sink. The sink has 1 1/2 inch BSP threads (these days also known as ISO R48 pipe thread), while the drainage pipes has 50mm straight fittings.

The design is parametric, so you can tune the height, pipe threads, clearance and so on.

I printed in ABS, no idea how long it will last.