Industrial ST065700AV Air Compressor Unloader Valve

ST065700AV is a 5/16" tubing air compressor unloader valve sold as a direct replacement part for Campbell Hausfeld and similar brands that use 5/16" line connections. The part number ST065700AV is explicitly identified on retailer listings as the "Air Compressor Unloader Valve for 5/16" Tubing," confirming its intended interface. Retail pages from Pacific Air Compressors, Friday Parts, and Kuduparts show ST065700AV described as the 5/16" tubing unloader valve used with Campbell Hausfeld air compressors, establishing its common application within 5/16" systems. These sources corroborate the valve’s documented size and role as a dedicated unloader replacement in Campbell Hausfeld/related-brand configurations.