Unpleasant odors from drains are often caused by a buildup of debris and organic matter, such as food particles, grease, and soap scum. When these substances decay, they can produce a foul smell. Blocked vents, dry traps, and damaged pipes can also contribute to smelly drains by preventing proper airflow or trapping odorous gases. Regular cleaning and maintenance, along with professional inspections, can help prevent and address these issues, keeping your drains fresh and odor-free. Ask one of our engineers to visit and investigate the problem for you, they will then be able to advise on the best course of action.