Generally, flooding in basements occurs most frequently when water builds up in the surrounding area and overflows inside. A Sump Pump Orland Park IL is usually positioned in the basement at its lowest level. Its purpose is to pump the water back out and away from the home before the level of the water reaches the basement’s floor level. Sump pumps are typically installed for two reasons: one is when the home’s basement is located where flooding may be a recurring problem. The second reason is if the water table is equal or above the home’s foundation.