As galvanized steel pipes corrode within and form rust, lead that has accumulated over decades is likely to be found deep in the interior walls of those rusty pipes.

Q: I live in a 1940s house that has galvanized pipes.The cold-water tap in the bathtub has become blocked. A plumber said debris is clogging the pipe, and the only thing I can do is repipe the ...

Rust takes up more space than steel, so the corrosion eventually fills up the pipe. “It’s a rusty, crusty mess,” said Tim Whistler, owner of Tim Whistler Plumbing & Gas Fitting, which works ...