This drain stopper is designed to be printed in flexible filament (TPU). I sized it with the a “plug” diameter of 40mm for a sink with a 45mm opening.  Note that while the “plug” part fits into the drain, it is actually the flat rim that seals the drain opening.

Print Instructions

Print in Flex (TPU) :

• print “plug side” up (see photos)
• perimeters = 4
• top/bottom infill = concentric; 0% infill
• 0.3mm layer height
• no supports required

CAD

The OnShape 3D CAD files for this are here :

[https://cad.onshape.com/documents/7c31f427028bb12b243de7c7/w/26bedbef507463253872bb79/e/16bce64cb13235ca0e3f51ee?renderMode=0&uiState=64af45bf30ebdb6ecac598da](https://cad.onshape.com/documents/7c31f427028bb12b243de7c7/w/26bedbef507463253872bb79/e/16bce64cb13235ca0e3f51ee?renderMode=0&uiState=64af45bf30ebdb6ecac598da)