Backflow preventer valves are devices used to prevent backflow from happening on your property.  When there is a sudden change in water pressure within your pipes, either back-pressure or back-siphonage is the cause, and this can lead to contaminated water flowing back into the main water supply.

Backflow preventer valves prevent this from happening.  The valves shut off the flow of water so that contaminants cannot reverse direction and pollute potable water.

For the very best in backflow preventer valves, call City Backflow Testing, the backflow experts, certified and licensed in most major cities in the Dallas-Ft. Worth area.