Blocked drains are every homeowner’s bad dream. They can cause incredible inconvenience, damage to your property, and pose a health risk to you and your family. Unfortunately, drain blockages are inevitable, and no matter how clean you keep your drainage system, you’ll experience blocked drains from time to time. Drain blockages occur when solid particles or materials accumulate in the pipes causing the water to obstruct flow. Here are the main causes of drain blockages and how to avoid them.