A blocked drain is usually caused by an accumulation of fat oil and leftover, hairpiece, detergent, residue, or unknown objects in the pipes. Over time, this growth will increase leading the pipes to reduce, eventually directed to a blockage. Usually starts from a small particle that traps inside a drain pipe we usually cannot notice it until it builds up and clog the pipe. A blocked drain starts due to our negligence and lack of knowledge we sometimes don't mind this simple and small problem until it ends us a huge disaster and home damage to our property. The experts at Plumbing and Electrical Doctor have put together some of the most common causes of a blocked drain, along with the steps you can take to avoid them.