A blocked main sewage line can spell serious disaster for a homeowner. Having raw sewage backing up into your home is a nightmare that no one wants to experience, but it does happen at times. So, what does a plumber do when this happens? Well, there is a way to access your main sewage line called a sewer cleanout. This pipe can usually be found outside your downstairs bathroom, or in colder climates, inside near the bathroom. The pipe will have a square peg on it for a specialized tool that will open the top. A plumber will use a snake from that location to get to the blockage. This could save you the time and expense that digging up the pipe would entail. Of course, most homeowners wouldn’t be able to do this themselves, since they lack the tools and experience to deal with it, and working with sewage is not going to be a pleasant experience.