Backflow Testing in Lewisville, NC

Lewisville's water and the WSFC program

The Town of Lewisville has an agreement with the City-County Utilities Commission, which provides water and sewer through Winston-Salem/Forsyth County Utilities. That makes WSFC's Cross-Connection Control Program the rulebook here. Property owners must install, test and maintain backflow assemblies on every cross-connection. Testing is done when an assembly goes in and then on a schedule by a WSFC-approved tester, who files the report through BSI Online. BSI mails a reminder letter about 30 days before each due date.

In September 2024, NC Senate Bill 166 changed the schedule for many homeowners. Eligible residential irrigation systems that don't have a chemical feed now test every three years. Installing a new assembly needs a permit from the Winston-Salem Inspections Division, which serves Lewisville, and the work must be done by a properly credentialed plumbing or utility contractor.

Lewisville's housing is a mix, with a median build year of 1987 and about 35% before 1980, and the town keeps a Rural Overlay where not every area is served by public lines. If your home is on a private well, the WSFC program doesn't apply to it.

Signs it's time to call

• A BSI letter says your test is due within the month
• The assembly near the meter is wet, cracked or hissing
• Your test result came back as a fail
• You're adding irrigation on a lot off Shallowford Road or Lewisville-Vienna Road
• You aren't sure whether your sprinklers qualify for the three-year cycle

Seasonal notes

Spring, before sprinklers run daily, is the natural window for testing and repairs. Before the first hard freeze, shut and drain the irrigation side if your system allows it and wrap an above-ground assembly. Repairing a device after a freeze often turns into a full replacement, which brings in the permit step.