Sink Drain / Strainer (GDR Sink)

This is a sink strainer for a DDR sink that screws directly onto the DDR siphon (M6 countersunk screw)

This is based on the original but adapted for 3D printing. (together with a gasket for an approx 45mm hole)

I also designed a matching gasket which I link below. (The original gasket also fits)

matching gasket in TPU95A adapted for 3D printing: (suitable for an approx 45mm hole)

The material should be somewhat more temperature stable. ABS or preferably ASA

The print should be solid. Tensile forces occur and lateral forces also need to be absorbed by the gasket

The part is usable right off the printer. But it is not perfect. (The two-color version was created because I ran out of filament, but if desired, I can create such a version)

Suboptimal Properties: Version 1 (2026-06-16)

• The top edge is so narrow that it prints somewhat uncleanly. (for V2, I need to increase the thickness of the top layer to at least 2 layers)
• The underside is partly somewhat unclean due to the rather steep angle (here I will create an additional version with maximum support, I already tested this with a prototype, which worked but was very difficult to remove and used a lot of material)
• Test of a version with a slightly larger inner diameter so that the original plug fits completely. (but this causes sidewall weakening; the wall thickness is needed to withstand the tensile forces, as a gasket must be pressed by the siphon and the insert)
• Testing with slower printing only yields a slightly better surface. So far, only improved with significantly more elaborate support.

Max Support Version added: (2026-06-19)

• Support greatly expanded so that thin sloping surfaces appear cleaner
• Top edge increased to at least 0.2mm
• Unfortunately, support is therefore very difficult to remove (unfortunately, I currently lack ASA material for further tests and optimizations)