#28: Old Plumbing Materials
Old plumbing can make buyers nervous because much of the system is hidden. Galvanized pipes, rusty water, weak pressure, slow drains, or signs of small leaks may suggest future repairs, water damage, or expensive replacement work behind walls and floors.

A plumbing inspection can clarify the real risk. Sellers can fix leaks, replace problem sections, show repair records, and make sure water pressure is steady. Buyers should ask about pipe materials, past leaks, sewer lines, and whether older plumbing has been updated.
