Our house is 12 years old. My sub pump discharges into a drain pipe that goes under ground and leads to the sewage toward the street. Problem is the builders use flexible piping and when the ground settled, so did the pipe. So the water doesn't get past where it settled and therefore backs up and and over flows right where the pump discharges. This causes the pump to work even harder. It's about 50 ft to the street. Had a plumber take a look and wanted $2500.00 to dig it up and lay new pipe. Is this reasonable or is there another to go about fixing this.