If you're buying an old house, beware of old galvanized steel water pipes. These pipes build up with sediment on the inside, making the inside diameter of the pipe smaller and smaller over time, ...

Harold Harrington is a master plumber. Fixing people's pipes is what he does. But it was something he found in his own home in Flint, Mich., that disturbed him. "This came out of my house," Harrington ...