905478 (Febco) | 2-1/2 - 3 Inch | 850 DC First or Second Check Repair Kit or 860 RP Second Check Repair KitThis Check Kit Includes The Parts Necessary to Repair or Replace Either The First or Second Check Module of a 2 1 2 to 3 Inch Double Check Valve Assembly, 1st Check of a Double Check Detector Assembly, or 2nd Check of a Reduced Pressure Zone Assembly. All Parts Are Genuine And Original to The Valve. Febco 905478