A clogged drain is typically caused by the gradual buildup of organic matter like hair and grease on the inside walls of drain pipes. Over time, this buildup slows down the normal flow of water through the pipe. Think of cholesterol in the blood stream when trying to understand a clogged drain. When a clump of debris or hair tries to pass through the pipe, it can become stuck and completely block the flow. The result is a clogged bathroom or sink drain.

There are many causes of a sewer backup. The main three causes are clogging, tree roots, and broken and/or collapsed sewer lines. Clogging is most caused by root intrusion and grease buildup. Tree roots penetrating sewer lines are a common problem experienced by residents. Over the years the sewer lines develop cracks and fractures due to old age. Roots thrive most in warm, moist and nutrient dense environments.