The Febco LF856 is double check detector assembly ( DCDA ). It is available in 2 ½” – 10” sizes and began production in 2014. The body is made of ductile iron with a fused epoxy coating. Parts are not interchangeable between the LF856 and 856. The LF856 utilizes a type 2 bypass assembly with a LF619 single check for the bypass assembly.
American Backflow Products Company