SPECIAL ORDER ITEM. Review Returns Policy before purchase. The ProPEX lead-free brass sweat fitting adapter collection provides a reliable transition solution for plumbing and hydronic piping systems. Engineered for strength and durability, these adapters facilitate the connection between PEX piping and copper components, ensuring a secure and efficient water delivery system. Designed to meet rigorous performance standards, this adapter supports professional-grade installations in both residential and commercial environments. Its robust construction offers long-term reliability, making it an essential component for modern plumbing infrastructure that requires consistent, leak-resistant performance across diverse building applications.