If you know where your main cleanout is (usually a white pipe with a cap sticking out of the ground near your foundation), you can open it. If water is sitting in the pipe or flowing out of the cleanout opening, the blockage is between your house and the street sewer (or septic tank).
Spin the blades to chew through the obstruction (roots or wipes). unclogging main sewer line
If you live in an older home with large trees, have a plumber snake your line once a year as a preventive measure. Final Thoughts If you know where your main cleanout is
A classic sign is flushing the toilet and having water bubble up in the shower or bathtub. unclogging main sewer line