The sump pump [pit or resouvior]has water flowing in from the outside of the drain tile. The drain tile is a plastic tube shape and the installer cut a much larger hole in the pit than was needed.[about 2 times the size].My question is---Can I fill in the area around the drain tile to hold back some of the water and mud that is coming in through that area around the tile? If I can what would you recomend I fill this area with? It looks like gravel and clay on the outside of the basement wall.