Many homes across North America, and most with basements, have a drain tile system that is designed to capture water from around the foundation and funnel it to the sump pit, allowing the pump and discharge piping to carry the rising groundwater as far away from the foundation as possible. Without this system, water can seep through the walls and joints, causing mold growth, musty air within the house, and possibly leading to walls bowing and collapsing. A drain tile system is necessary for a healthy home but it creates a quick path for water to get into the home when issues with the pump happen. So every sump pit needs a redundant backup system for total protection.