905473 (Febco) | 8 - 10 Inch | 850 DC First or Second Check Repair Kit or 860/880 RP Second Check Repair KitThis Spring Module Kit is Used to Repair Either The First or Second Check Spring Module of a 8 And 10 Inch Double Check Valve Assembly or a Double Check Detector Assembly, Series 860 And 880. This Kit Consists of All Parts Necessary to Repair The Spring Module of The Applicable Valve. All Parts Are Genuine And Original to The Valve. Febco 905473