A MASSIVE RENOVATION of the old Portland Press building in Portland, Maine, is underway. I took a tour last week through the building to chronicle its sustainability efforts. Like many buildings erected in the 1920s, it was built with vast amounts of concrete, framed with huge steel i-beams. According to project manager Alyssa Parker, crews have faced some daunting work drilling through that concrete, to make way for a completely new plumbing system. One smart move was to specify PEX-a-Pipe tubing from Uponor. Not only is the stuff color coded, it's also forgiving, and this particular brand of PEX is one of the most flexible. It forgives and bends easily around ancient beams and mechanicals.