I have a problem. I have one toilet on my main floor. In the basement utility room, there is a hole in the floor where a toilet could go, but there is nothing there right now. Starting this past week, when I would flush the toilet from upstairs, the sewage began spewing out of the hole in my basement floor, causing an unspeakable mess. Can I solve this problem by filling the hole with concrete? I don't have much cash but am tired of running to my local gas station every time I need to take a crap. I realize filling the hole in the basement may cause a backup upstairs, but I plan to plunge the hell out of it. Do I have anything to lose?