When living in a home, sometimes a drain will become clogged. The causes of a clogged drain can be because there is too much hair in the drain, too much grease, or if it is a kitchen sink there can be too much hair. To unclog a drain, one can pour some type of drain unclogger down the drain. Sometimes bleach and boiling water can help to unclog the drain, along with plunging it with a plunger. When all of these options fail, one can call an experienced plumber to come and fix the drain. A plumber can be found in the phone book or also on the internet.