It's no secret that homeownership comes with many undeniable perks. However, the "American Dream" also comes with its fair share of unexpected problems (and costs) - many of which you can't see. And if there's one thing most homeowners can mutually agree on, it's that out of sight should not mean out of mind when it comes to property maintenance. After all, some of the costliest potential home repairs lie buried below the surface. We're talking about your home's service lines.