In this video you will see how to remove the plunger rod when unclogging a sink. To unclog a sink drain, remove the bent portion the drain and clear it out. Normally something or the other gets stuck inside it causing the clog. Also check out both ends of the other pipes. The plunger to your sink is attached by a little rod. Slide the little catch off the rod; remember which hole it is on so that you put it back correctly later on. Then take pliers and loosen the plastic nut gently and pull the plunger out. Watch the video for further instructions.