How to Unclog a Drain – Get the Water Flowing Freely Again. Drains are not something you probably consider to be a large part of the functioning of a home.  However, when those drains quit doing their jobs, they become much more noticeable!  Before spending a lot of money on a plumber for your plumbing problems, consider trying to fix the problem yourself.  A clogged drain demands immediate attention.  Learning how to unclog a drain yourself will save you time and money.  Whether you need to know how to unclog a drain for your bathtub or kitchen sink, this article will guide you through without the use of harsh chemicals. Also see how to install a toilet yourself.