When we run the washer upstairs and/or drain the bathbu when full it will cause a bubbling up in the toilet downstairs and a backflow in the bathtub and toilet downstairs. We have only seen the toilet backflow once. If we wait it drains eventually. In fact in the kitchen sink downstairs water came spouting up from it about a foot in the air today. For months we have been able to hear a bubbling in the lines upstairs when running the washer and when the washer drains we get a very bad odor from the kitchen sink which runs along the same line. We are on a septic system by the way... HELP!!
