SPECIAL ORDER ITEM. Review Returns Policy before purchase. The XL Brass Test Plug collection provides a reliable solution for PEX hot and cold water plumbing applications. Engineered for performance and longevity, this component is essential for maintaining system integrity during testing phases. Its robust construction ensures it can withstand the rigors of demanding plumbing environments, offering peace of mind for both residential and commercial installations. Designed with precision, this plug facilitates efficient workflow, allowing professionals to verify system connections quickly and effectively. Whether you are working on a new construction project or a retrofit, this versatile tool integrates seamlessly into existing PEX plumbing and radiant heating systems.