I live in a 7 year old house with a sump pump. For the first 6 years, we never had a drop of water. About one year ago, we had a very heavy rain and we had water in the basement. It came in all around the perimeter of the room. We figured it was just because the rain was very heavy. About three months ago, we had water again during a hard rain. I called a handyman who replaced the sump pump telling me the old one was full of silt. We relaced it with a RIGID 1/2 horse pump. Since then, when it rains, I notice that the pump works fine for the first 15-20 minutes, then the crock begins to fill rapidly. After the rain stops, it sometaimes takes four to five hours of continuous operation to empty. If I unplug the pump the water level does not change, so I know the drain tile is empty. Also, we have four drains outside in window wells that look like they are not taking water also. Does this sound like a blocked sewer line?