Fats, oils, and grease aren't just bad for your arteries and your waistline; they're bad for sewers too.
Sewer overflows and backups can cause health hazards, damage home interiors, and threaten the environment.
The second leading cause of all sewer overflows is grease blockages. Grease can get into the sewer from household drains as well as from poorly maintained grease traps in restaurants and other businesses.
Sewer Main Lines are sized to handle waste water only, that is why:
City ordinance prohibits property owners from disposing of clear water into the sanitary sewer system. This includes water from any roof, surface or ground sump pump, or foundation drain.