The most common red flags, sewer main cleaners say, are water backing up out of a drain or the toilet plumbing, or a gurgling sound coming from the drains. “Your house is basically going to talk to you,” says Tammy Sims, senior technician with R S Sewer Cleaning in Indianapolis. “If you notice that when you’re done with the washing .A sewer drain clog is a very serious problem that can be considered a plumbing emergency and a potential health concern. Since the wastewater has no place to go, it will all come back up into the household plumbing system in one way or another. When you have a sewer drain clog, you should not use any of the plumbing in the home until .Sewage is backing up into your home, way beyond just an overflowing toilet The city sewer probably has a major blockage and you are downhill from other people’s homes. Their sewage is backing up through your main sewer drain. Contact the city..