I went by way of this very comparable concern final 12 months ~ unhappy to assert, the wrongdoer substitute right into a collapsed sewer line. regrettably, we spent virtually $2000 in roto rooter calls formerly somebody found out that the line substitute into collapsed. The flooding did no longer substitute right into a undertaking for us the two till we went by way of a heavy wet season ~ apparently, the floor substitute into so saturated with water, that the sewage water had nowhere to "perk" out and subsidized up into the lavatory quite. you are able to attempt renting a plumbers snake from a apartment place, and reaming out the line your self. Pour down some root killer, and notice if that solves the undertaking for you. Calling the sewer company is likewise an option ~they'll flush the foremost sewer line on the offchance that there is a clog someplace close to the relationship factor between your line & the foremost. If neither of those artwork, i might hit upon an excellent rooter company (avert the franchise agencies) and have them run a digital camera down the line. This expenses approximately $350 yet is the only thank you to be sure what's happening. it might desire to be something so trouble-free as a flapper valve it particularly is wedged open. If it particularly isn't an option for you as we communicate....you will might desire to study to stay with this till you are able to scrape mutually the money. What this suggests is being extremely scotch with your water intake ~ including one minute showers, rare flushings, etc.