Febco: 4" - Rubber Parts Kit for an 850 DC / 856 DCDA / 870 Double Check / 870V DC / 876 DCDA / 876V Double Check Detector Assembly
Kit Includes: 2 Check Discs, 2 Seat Gaskets, 2 Cover O-Rings, 2 Cover Bushings, Cover Plate Gasket & O-Ring, 4 Bulkhead Gaskets