2 1/2" to 4" Dia Backflow Repair Kit, #2 Check Assy 375A/350A/475/450, Zurn, Mfr#: RK4-350CK2

The 350CK2 Repair Kit is compatible with sizes 2 1/2", 3", and 4". The Repair Kit comes with Seat Retainer #2, O-ring Check, Bolt Poppet Retainer, Washer Poppet Bolt, O-ring Poppet Bolt, Poppet Retainer, Seal Ring, and Seat Assembly #2 Poppet.