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Start with the building’s plumbing map, not just the faucets
A condominium unit is connected to a larger system of domestic-water supply lines, drain and waste piping, vents, and vertical risers commonly called stacks. A leak discovered in one kitchen or bathroom may originate in that unit, a unit above, a shared line, or an exterior assembly. Ask for any available plumbing riser diagrams, original plans, repipe scopes, permit records, invoices, and engineer or plumber reports. Confirm which materials remain, where they are located, and whether prior work covered the whole building or only selected lines.
Age alone does not establish condition, and a recent renovation does not prove that concealed piping was replaced. Have the inspector document visible supply connectors, valves, drain connections, corrosion, staining, patched access openings, and signs of earlier repairs. Ask management whether stacks have failed repeatedly in the same vertical line, whether walls have been opened for access, and whether a building-wide replacement is being studied. Treat verbal answers as leads to verify in written records rather than as a substitute for those records.

