The camera sees the inside wall of the pipe and not much else, but that's where nearly every sewer problem starts. Here is what we look for, and what each finding means for the fix.
**Roots.** Roots find a hairline crack or a loose joint and follow the moisture in. On video they show up as a curtain of fine hair at a joint, or a solid mass that stops the camera. HomeGuide notes root intrusion is common in older cast-iron and clay lines and less common in PVC. Where roots enter tells you where the joint has failed.
**Offsets.** Clay and cast-iron sections come in short lengths, so an old lateral has a joint every few feet. When soil settles, those joints shift. The InterNACHI sewer scope standard treats an offset over ¼ inch as needing correction. A single offset near the house is a small dig; offsets all the way to the street tell a different story.
**Bellies.** A belly shows as water pooled in the pipe with the camera half-submerged. The standard flags more than 1 inch of standing water. Bellies collect paper and grease and are the usual cause of a drain that clogs every few months no matter how often it's cleared.
**Cracks, breaks and crushed pipe.** Longitudinal cracks, missing pieces and pipe squeezed out of round, often where a driveway, a tree or a past utility dig loaded the line.
**Orangeburg deformation.** Orangeburg is a bituminous fiber pipe, plant fiber and asbestos soaked in tar. The City of Ann Arbor describes it flattening under earth pressure as it deteriorates, and notes inspectors have seen pipe that still looked round outside while the inside had gone out of round. On video it reads as an oval, blistered or delaminating wall. Orangeburg doesn't get spot-repaired well; when you see it, plan on replacing that run.
**Material changes.** Older laterals are often a patchwork: cast iron through the foundation, clay or Orangeburg across the yard, a PVC section where someone fixed a break years ago. The video shows where each change happens, which is often where the next failure is.