Outside the public water and sewer areas, the Fauquier County Health Department permits wells and septic systems, so the first question on a Broad Run job is where your water comes from and where it goes. A well brings a pump and pressure tank, septic a tank behind the drains, and each has its own contractor. We work on the pipes, fixtures and water heater between, starting with one drain, $200 to $800, or the main line, $550 to $1,650.
FCWSA says it doesn’t promise even pressure and that over 80 psi the customer installs a pressure regulating valve at their own expense. Prince William Water says the valve is the homeowner’s to keep up, and that pressure rises with the height difference between your house and the tank serving it. A valve installed is $500 to $1,000. A house on its own well answers to its pump and pressure tank instead.
More than one night in four falls to freezing or below at Warrenton 3 SE, the nearest long record, and Fauquier County sets frost depth at 24 inches. Late January 2026 brought Extreme Cold Warnings on January 27, 30 and 31. A pipe in an outside wall, a crawl space or an unheated garage is where a freeze starts, and a split may not show until the thaw. Tracing the water to its source runs $200 to $500.
The middle owner home dates from 1979, and about one in six predates 1960. Virginia Cooperative Extension’s well clinics tested 97 Fauquier samples from 2012 to 2017, and 46 percent came in below 6.5 pH, which its report says can pull metal out of copper pipe and brass fittings. Your well may read differently, and a test tells you. Where pinholes keep turning up, a repipe, $1,000 to $12,000, gets priced beside the next repair.