01Map the affected fixtures
List every slow, gurgling, overflowing, or backed-up fixture and note what happens when other plumbing is used.
- One fixture may indicate a local restriction
- Several fixtures may share a branch
- The lowest drain often reveals downstream backup
02Review the history
Recurring stoppages, roots, previous repairs, older materials, odors, and yard changes can justify a deeper inspection path.
- Record prior clearing dates
- Identify accessible cleanouts
- Share known material or repair transitions
03Match the tool to the decision
Clearing restores flow; camera inspection can support location and condition decisions when access and line conditions permit a useful view.
- Confirm flow after clearing
- Use camera evidence with symptom history
- Plan excavation only after location and access review