The Febco 870/870V is double check valve assembly ( DCA ). It was available in 2 ½” – 10” sizes and was produced from 1993 -2013. The body was made of ductile iron with a fused epoxy coating. The 870 came in an “N” shaped pattern as well as a “V” pattern for vertical set up. A lead free version was introduced in 2011 (LF870). Parts are not interchangeable between the 870 and LF870.