Start with the problem you want solved
Describe the visible evidence: dripping, a damp surface, water-meter concern or staining that appears after a fixture is used.
Holladay: planning the visit
For a remodel or leak behind a finished surface, ask how the plumber will narrow the investigation before opening walls. Collect photographs of the visible damage and note which fixture use seems related. Confirm responsibility for patching and restoration separately from the plumbing repair.
