This is a do-it-yourself video of how to unclog your sink when it is clogged up. First plug the sink stopper so that no water flows into the drain. Now place a bucket below the U-bend and remove the bend by rotating the coupler. If there is any water in the bend it will fall into the bucket. Remove the clogging waste with the help of a twizzer or any other contraption. Check if the vertical pipe from the sink is clogged or the outlet in the wall. Clean all the venerable point so that it allows free flow of water. Refix all the parts.