The visit starts by confirming the problem is sewer-level. Which fixtures are affected? Do they react to each other? Is the lowest drain in the house the first to show symptoms? Is there odor or moisture near the cleanout? Those answers separate a branch drain issue from a sewer lateral issue - and if the symptoms are sewer-level, the cleaning scope focuses on the main run, not individual fixture lines.
Once confirmed, the sewer lateral is cleaned through the cleanout. The cleaning method - cable, jetting, or a combination - is matched to what the line contains. Soft buildup and sludge may respond to cabling. Grease layers hardened against the pipe wall, root mass at joints, or heavy sediment accumulation require jetting at wall-contact pressure to strip the material from the pipe interior. The technician makes that call based on what the line produces at the cleanout and what the access conditions support.
After cleaning, the camera documents the result. The footage shows what the pipe walls look like clean - intact sections, joint conditions, residual buildup that did not release, root entry points, and any structural issues that the buildup was masking. That footage is what separates a complete sewer cleaning from a blind clearing. You know what was in the pipe, what the pipe looks like without it, and whether the line is healthy, needs a maintenance cadence, or has a section that requires further attention.