This is a NAVSUP WSS requirement for a complete 2-inch inline vacuum breaker check valve built to CPV Manufacturing drawing PLC-12385, CAT 123A MOD (less tailpieces and union nuts), with a QQ-N-281 Class A body and Level 1 oxygen-clean processing. The item is designated SPECIAL EMPHASIS Level I/Scope of Certification material for a crucial shipboard system, requiring pressure testing, NDT for weld repairs/production welds, CID marking, MOLYKOTE 4 lubricant, and extensive material traceability and certification. The contractor must maintain an ISO 9001 quality system (or MIL-I-45208 alternate) with calibration to ISO 10012/ANSI Z540.3/ISO 17025, submit required quality/certification data, and support Government quality assurance at source. The award will be FOB destination, bilateral, and DPAS-rated for national defense, and the requirement is being processed under Emergency Acquisition Flexibilities. Offerors should be prepared to provide facility/CAGE information if packaging at a location different from their address and to request drawing access through SAM.gov if applicable.