SPECIAL ORDER ITEM. Review Returns Policy before purchase. The XL Brass Coupling collection offers a dependable solution for modern plumbing needs, specifically engineered for PEX hot and cold water systems. These high-quality insert and crimp fittings are designed to streamline your plumbing projects, ensuring that every connection is secure and reliable. By prioritizing ease of use, these components allow for a fast and efficient installation process, making them an ideal choice for both professional contractors and dedicated DIY enthusiasts. The robust construction provides exceptional durability, standing up to the rigors of daily use in various residential and commercial applications.