SPECIAL ORDER ITEM. Review Returns Policy before purchase. The 1/2 in PEX-A Expansion x 3/8 in O.D. Compression Straight Stop Valve is a high-quality plumbing valve designed to control water flow at fixture points while providing a reliable transition between PEX-A tubing and compression-style supply lines. It allows for quick shutoff and maintenance access without disrupting the entire plumbing system.








