This picture gives a better view of the SuperSump. This isn't your ordinary sump pump, it has several features that sets it apart from competitors. The liner is one of the big benefits of a SuperSump, the liner allows water in, but keeps water from escaping through the airtight lid. It also has a WaterWatch Alarm (the red and yellow "hockey puck") that notifies the homeowner if the pump is not functioning and the water level is rising.