The oldest sewer lines with a Woodbridge address sit under the Census place called Woodbridge, the older ground along Route 1, where about one home in nine went up before 1960 and more than four in ten before 1980. A line that old is usually clay tile or cast iron, and every joint is a seam a root can work into. Houses from the late 1940s into the early 1970s may drain through Orangeburg instead, a pressed fiber pipe that slowly loses its round shape, so on an unknown line there the first tool in should be the camera.
Dale City came next: about four in ten of its homes predate 1980, nearly all of them from the 1960s and 70s. A line from those decades may be cast iron, clay or, in the earliest sections, Orangeburg; by the 1980s builders had mostly gone to plastic. The trees planted with those houses have had half a century to grow.
Lake Ridge and Potomac Mills went up mostly in the 1980s and 90s, six or more homes in ten in each, usually on PVC. Sound plastic keeps roots out; a joint that pulled apart as the trench settled lets them in. Inside the Lake Ridge association, cutting a tree down counts as an exterior alteration, so if the camera traces roots to a tree that has to go, the Architectural Committee signs off first.
Leesylvania and County Center are the newest, eight homes in ten built since 2000, usually PVC all the way to the main. About a third of Leesylvania’s homes are rented, and close to half in the Woodbridge CDP. Virginia law has a landlord keep the plumbing and sanitary facilities in good and safe working order, so in a rental the owner usually books the camera and approves the price.