Christmas 2010 Family home and septic backs up. Built house in 1963 so septic is 47 years old. Pump septic, backs up again in July 2011. Both inlet and outlet pipes in septic on bottom of tank. Distribution box lid for drain field is collapsed. All drain lines appear plugged. Had septic pumper push suction line as far into each drain line as possible. He thought they opened up enough to be serviceable. rebuilt the distribution box with new lid. Reattached the inlet and outlet lines in septic tank. Purchased Aero-Stream conversion kit. Installed and started pump. No problem until July of this year when air pump ceased to pump air. Sent pump back to Aero-stream received back a week later and all is well again. See pictures in separate email of distribution box and septic tank inside.