905146 (Febco) | 10 Inch | 870 DC | Dcda First or Second Check Spring Module And 880 RP 2nd Check Spring ModuleThis Spring Module Kit Includes The Parts Necessary to Repair or Replace The First or Second Check Spring Module of a 10 Inch Double Check Detector Assembly or a Double Check Detector Assembly, Series 870 And 880. Kit Includes Spring Assembly, Load Pin, 2 Retainer Clips, And Cover O Ring. All Parts Are Genuine And Original to The Valve. Febco 905146