Don’t contaminate the system with foreign objects and substances such as kitchen grease, automotive fluid, diapers, paper towels, feminine products, etc. These types of items regularly clog sewers in urban areas and often cause sewer back-ups not just for the offending party, but also in neighboring homes. Gutters and other storm water management systems should never be routed to a sanitary sewer. If you become aware of such a connection, immediately sever the connection and/or report the connection to the City of Liberty Utilities Maintenance Division at 816.439.4763. Install a back-flow preventer, a one-way valve device designed to prevent sanitary sewer overflows. If you have a back-flow preventer installed on your sewer line, you must be aware that it is designed to close when the sewer is flowing beyond its capacity, as can occasionally occur during a heavy rainfall. If you use your internal drains while the backflow valve is closed, you can create a flooding situation in your own home. Do not use your laundry machine, dishwasher, shower or bath; and minimize the use of sinks and toilets while valve is closed.