Check Spring

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The Febco 806 Series double check detector assemblies began production in 1979 and is still in production. Based off the 805 series, it has a bypass meter to monitor water usage, most common on fire systems. The 806 series was available in sizes 3 - 10". The earlier 806/806Y body was constructed of epoxy coated cast iron. It featured epoxy coated cast iron check assemblies. A spring compression tool is required to change springs. No special tools are required to change rubbers. The 806Y had replaceable seats but a special tool was required for removal. the 806YD was introduced in 1988. The body was changed to a ductile iron, painted epoxy coating. In 1991, the painted epoxy coating was replaced with a fused epoxy coating. All check assemblies where changes to stainless steel construction. The newer stainless steel checks are interchangable with the older cast iron or bronze check assemblies. The seats were redesigned so no special tools are required for servicing. The covers were also redesigned and in turn the cover O-rings are different. All rubber repair kits include both old and new style cover O-rings. Check disc rubbers remained the same through all the years of changes. Bypass backflows are all 3/4" and were either model 805Y or 805YB.

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