Water Softener in Chantilly, VA

Is a softener worth it for a Chantilly home?

For many households, yes. Fairfax Water's Potomac plant averages around 128 mg/L, about 7.5 grains per gallon, and readings climb toward 11 at times. That's enough for scale to build in water heaters, on glass shower doors and inside dishwashers. If you're seeing white crust on aerators within a few months of cleaning them, or hearing popping from the water heater, a softener is a reasonable investment. If your reading comes in at the low end and you don't see buildup, you can wait.

Fairfax Water says most customers get water from its own plants and some get Potomac water treated by the Washington Aqueduct, so test at your own sink rather than relying on a neighbor's number.

Where does a softener go in a typical Chantilly house?

The median home here was built around 1987. Most have a basement or a garage utility area where the main comes in beside the water heater, and copper supply lines are the norm. That's the spot for the resin tank, the brine tank and a bypass valve. The regeneration line runs to a floor drain, a laundry standpipe or a sump, with an air gap. The control valve needs a standard outlet. In townhouses with a slab-level utility closet, space is tighter and a compact cabinet unit may fit better than two tanks.

What about the water's taste and the chlorine switch?

A softener won't change it. Fairfax Water normally uses chloramines from July through March and free chlorine from April through June, and some people notice a chlorine smell in spring. A carbon stage, either whole-house before the softener or a filter at the kitchen sink, reduces that. Carbon in front of the softener also helps shield the resin from chloramine, which can break it down over years.

A local note

Fairfax County requires a testable backflow assembly on lawn irrigation, tested every year. Have the plumber tee irrigation off before the softener so the lawn doesn't use softened water. For new or relocated piping, Fairfax County Land Development Services is the permit office for Chantilly; like-for-like replacement in the same location is exempt.