Report "Ejector system The system goes to a control box that allows pumps to be used alternately. From time to time one of pumps comes on but only swirls the water around and stays on. When I hear it I flush toilets, etc until enough fluid has gone into the tank to trigger the "emergency" float. It then kicks on the other pump and once drained enough all switches turn off. I spent 90 mins today cleaning the floats and checking the weren't being held up by sewage or the other floats. Can someone tell me what's likely to be the cause of one pump not evacuating when it comes on. Thank you"