SPECIAL ORDER ITEM. Review Returns Policy before purchase. The XL Brass pipe thread adapter collection provides a robust and reliable solution for professional plumbing installations. Engineered for versatility, this adapter is specifically designed for use in PEX hot and cold water plumbing applications, ensuring seamless integration into your existing infrastructure. Its high-quality construction offers exceptional durability, making it an ideal choice for both residential and commercial projects where performance and longevity are paramount.