MAG Plumbing Service LLC Share: Professional Services MAG Plumbing Service LLC 10867 84Th St SE Alto, MI 49302 616-868-0087 About Map About Service and remodelling is our niche. From bathtubs and showers, to faucets, toilets, sinks, sump pumps, we service it all. ASSE certified for backflow preventer testing and repair. What's Nearby? Distance: 5 10 15 20 25 50 mi.