This presolicitation is for a shuttle valve (NSN 4820-00-4370022) and is 100% set aside for small business concerns. The solicitation will be available on DIBBS on or after September 9, 2026, with a possible posting delay of up to three business days. Award will be based on price, delivery, past performance, and other evaluation factors; offers must be in English and U.S. dollars. The government lacks complete technical data, so only approved sources (ATECH INC, CURTISS-WRIGHT FLOW CONTROL SERVICE, and TACTAIR FLUID CONTROLS INC) are intended to be solicited, though all responsible sources may submit offers. The place of performance is unknown, and the contract is subject to the Service Contract Act.