905480 (Febco) | 6 Inch | 850 Series DC | Dcda First or Second Check Repair Kit or 860/880 Second Check Repair Kit RP | RpdaThis Check Kit Includes The Parts Necessary to Repair or Replace Either The First or Second Check Module of a 6 Inch Double Check Valve Assembly, 1st Check of a Double Check Detector Assembly, or 2nd Check of a Reduced Pressure Zone Assembly. Kit Includes Check Module, Mounting Hardware, Cover O Ring, Bearing, And Bearing Socket. All Parts Are Genuine And Original to The Valve. Febco 905480