Pyramidlike stacks of corrugated pipe fill Johnston Fargo Culvert's 15-acre complex at 1522 40th St. N. in Fargo. Parked inside the company's 35,000-square-foot manufacturing plant are 200 rolls of ...

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 from the pipes was clogging the pipe, and the only thing I could do ...