VACCO Industries, South El Monte, California, is awarded a not-to-exceed $21,140,532 firm-fixed-price, undefinitized contract for the manufacture of a total of 56 various vent, air line manifold, and manifold assembly valves in support of the Virginia-class submarine atmosphere control system. This is a stand-alone contract with no options. All work will be performed in South El Monte, California, and is expected to be completed by September 2027. Annual working capital funds (Navy) in the amount of $15,855,399 will be obligated at time of award, and funds will not expire at the end of the current fiscal year. One company was solicited for this sole-source requirement pursuant to the authority set forth in 10 U.S. Code 3204 (a)(1), with one offer received. Naval Supply Systems Command Weapon Systems Support, Mechanicsburg, Pennsylvania, is the contracting activity (N00104-23-C-NA36).