The Febco 805Y/805YR/805YB is a double check valve assembly ( DCA ). It was available in ¾” – 2” sizes and was produced from 1973-2003. The body was made of bronze. In 1994 the 805YR ( ¾” & 1”) was introduced as a variation which had replaceable check seats. The model 805YB began production in 1995 and is still being used as a bypass assembly on certain models of Febco DCDA’s.