You can help keep fats from clogging pipes by disposing of grease properly:
Never pour fats, oils, or grease down the drain.
Never flush fats, oils, or grease down the toilet.
Always put grease in the trash.
Raw sewage in the pipes will attach to fats, oils, and grease, creating impenetrable globs that back up sewer lines. These globs of fat and waste are difficult to disinfect at treatment plants and can allow disease-causing pathogens to enter nearby streams, lakes, and rivers.