SPECIAL ORDER ITEM. Review Returns Policy before purchase. The Mainline Pex transition coupling collection offers a reliable solution for connecting plumbing systems with ease and precision. Engineered for versatility, this component is ideal for use in potable water distribution systems and hydronic heating applications. Its robust construction utilizes lead-free forged brass, ensuring long-term structural integrity and safety in residential or commercial plumbing environments. Designed to meet rigorous industry standards, this coupling provides a secure and leak-resistant connection that professionals and homeowners can trust for their essential water management needs. The dezincification-resistant material enhances durability.