When the plunger doesn't get the job done, then what? It depends on the line that is plugged. If it is a kitchen sink, you have a P-trap underneath that you can take off, clean out and get that going again. But if it is the toilet, you are really going to want to run a "snake" down through the toilet. What is a "snake"? It's nothing more than a cable that spins as it is going in. Now you have to be extremely careful when doing a toilet, because it will scar the porcelain down there and that scar will stay forever. Use something that has a plastic coating on it, so you can get it far enough in there where the scarring doesn't show. It's really a cable, and as it is spinning, it is cutting through whatever is blocking the pipe. Once the water starts flowing again your clog is taken care of.