The ¾ Backflow Preventer is a backflow prevention device used to protect water supplies from dangerous contamination due to back flow.  Most major backflow device manufacturers make these backflow preventers in varying sizes, from the ¾ backflow preventer to the 2 inch backflow preventer, depending on the system currently being used on your water system.

Back flow is a term used in plumbing that basically means exactly what it says….water flow back in the direction it came from, or an unwanted flow of water in reverse direction. How can this happen?  Most homeowners just take for granted that water will flow from the main city water supply, through their pipes