Removing pop up tub drain assembly
I called Kohler and they tried to help me realy nicely, they found it for me (http://www.us.kohler.com/us/catalog/svg_viewer.jsp?productId=415967&amp;diagram=0) and you can see that there is a elbow at the bottom in which the horizontal and the vertical parts are screwed in, so now after years of the installation the rod has got already a lot build up on it and its VERY hard to take it out:-(   (item is discontinued)