SPECIAL ORDER ITEM. Review Returns Policy before purchase. The Zurn XL Brass Coupling collection offers a dependable solution for PEX plumbing and radiant heating systems. These insert and crimp fittings are engineered for fast, easy, and safe installation, making them an ideal choice for both residential and commercial projects. Designed to maintain system integrity, these couplings provide a secure connection for hot and cold water applications. Their robust construction ensures long-term reliability in various environments, from single-family homes to large-scale institutional facilities. By prioritizing ease of use and consistent performance, this collection simplifies complex plumbing tasks while meeting rigorous industry standards for safety and efficiency.