The 400 Series provides a year round source of water in areas that are subject to freezing temperatures. The hydrant valve is connected to the supply piping in the heated portion of the structure, eliminating the possibility of freezing. The PRIER 400 Series features a half-turn design for years of easy operation. This replacement stem assembly is compatible with all old-style manufactured 400 Series hydrants (2006-2013) and includes the replacement stem, BFP sub assembly, brass bibb screw, rubber bibb washer, brass cage washer, rubber BFP washer, rubber stem end o-ring, stainless steel washer, and gaphite packing for the left hand packing nut.