A sewage ejector pump (also called a sewage grinder pump) is used when a bathroom, laundry room, or other plumbing fixture is located below the main sewer line. The pump grinds waste and pumps it upward to the main drain. They\'re common in basement bathrooms and below-grade additions. Signs of failure include: sewage odor in the basement, slow draining fixtures, or the pump running constantly. Ejector pumps typically last 7–10 years and should be inspected annually.