Backflow testing protects our water from being contaminated with chemicals, bacteria, and anything else that is foreign to the water source. These tests most be done once a year to ensure the valve and all its parts are working to protect our water. When testing RP’s ( Reduced Pressure ) valves a differential pressure gauge is used. When testing a DC ( Double Check ) valve a vertical site tub may be used. Prestige Plumbing & Backflow Services is your local backflow experts. We currently are contracted with the city of Deland to test all city matained valves. All our testers are certified thru University of Florida’s Treeo Center. We currently preform thousands of backflow tests every year. Prestige Plumbing & Backflow is Licensed and Insured Plumbing Company. We service central Florida.