ST3 Consulting LLC is a local, owner-operated backflow testing company based in Carnes Crossroads. We make annual testing simple & affordable for Carnes Crossroads, Hewing Farms, Mackey Farms, Cane Bay, Goose Creek & all Berkeley County. Same-day​/​next-day service, no surprises. FlowCert subscription ($49.99​/​yr Carnes, $59.99 elsewhere) auto-handles scheduling, testing & paperwork. One-time tests & repairs too. Keep our water safe—text​/​call (843) 473-7744 anytime!