Beeco FDC New Style Double Check Backflow Assembly (Barracuda 20) is engineered to prevent non-health hazard pollutants from contaminating potable water systems due to backpressure or back-siphonage, ideal for commercial, industrial, and fire protection applications. Available in sizes from 2-1/2" to 10", it features a 304 stainless steel body (FDC-SS models) for corrosion resistance, with smaller 1/2" to 1" models in bronze.