To a business, backflow is a serious and potentially costly concern. When a municipal drainage system or sewer overflows into your building, it can be a serious safety and health risk that requires immediate and proper clean-up. Backflow can cause damage to your building and equipment. Even more important is if a backflow is improperly cleaned, it could lead to disease and contamination of your property. Backflow prevention measures are required by the majority of city ordinances and these same regulations require you to have these devices tested annually.
Water systems use gravity and pressure to move water from one place to another. Wastewater generally flows by just using gravity, but old cracked pipes, blockages, heavy rain or snowmelt can slow or even stop the natural flow of wastewater. Your sump pump may fail, or there may be a blockage near your building. When the pressure leading away from your building drops or stops completely, the water that should be leaving your building can flow into clean water supplies. While you have no control over public sewer systems, you do have an ally in a backflow prevention device.