The Cla-Val DD8N is a double check detector assembly (DCDA). It was available in 2 1/2″-10″ sizes and was in production from 1995-2002. The body was made of epoxy coated ductile iron. The DD8N utilized a 3/4″ DC6L (a private label of the Febco 805YB) for the bypass assembly. The DD8N was a Cla-Val private label of the Febco 876.