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Master plumber Kevin Griffin tightens a 2 1/2-inch RPX backflow preventer on a job site for Lutz Plumbing.
Back in 1920, when William Lutz founded the plumbing company that still bears his name, Woodrow Wilson was president, the Cleveland Indians won the World Series and women in America had just gained the right to vote.
A century later, it’s hard to conceive how much things have...
