Causes
What Goes Wrong With Water Lines in Roanoke
A supply line works under pressure every minute of every day, buried in moving valley soil, expected to last decades without a thought. Here's what shortens that life around here:
Corrosion and tired materials. Pre-1960 Roanoke houses — Old Southwest, South Roanoke, and their contemporaries — often still run on galvanized steel. It rusts from the inside, so the first symptom is usually discolored water rather than a visible leak; by the time you see water, the pipe has been failing for years.
Moving ground. Roanoke's hillsides shift. Saturated soil on a slope can crack a line at a joint or pull a fitting apart, and lines on graded lots don't always run at the depth you'd expect — which matters when it's time to dig.
Pressure strain. Ridge-top homes and valley-floor homes can live at very different pressures. High or swinging pressure hammers joints, valves, and aging pipe walls — and when the whole property's pressure is off, the supply side (sometimes just a worn pressure regulator) is where to look.
Hard freezes. Roanoke winters dip below freezing as a matter of routine — days averaging the high 20s to high 40s — so hose bibs, exposed runs, and pipes in unheated crawl spaces or garages are genuine freeze targets. A freeze-split line can sit quietly until the thaw, then let go all at once. Learn your shutoffs before December, not during it.
Water chemistry. City water here is soft — around 46 parts per million — which treats pipes kindly. Some well-supplied pockets run harder (96–222 ppm) and can carry iron and manganese that stain fixtures and tint the water.
Yard damage. Shovels, fence posts, and construction equipment find buried pipe with depressing regularity. If the symptoms started after digging, say so on the call — it tells us where to look first.