XFITTING Pex Compatible with all types and brands of PEX B Tubing - Watts, Everhot, Viega, Zurn, Nibco, Bow, etc. Design certified to ANSI/NSF-61 and ASSE 1061 product standard for use in potable water and hydronic heating water distribution. Designed for hydronic heating as well as potable water distribution. 400 PSI Approved to be used underground and behind walls without access panels XFITTING PEX B Crimp Fitting - Reliable and Durable Plumbing Solution Upgrade your plumbing system with the XFITTING PEX B Crimp Fitting, designed for reliable and leak-free connections in residential and commercial applications. Made from high-quality brass, this fitting ensures long-lasting performance and is perfect for use with PEX B tubing. Its precision-engineered design makes installation quick and straightforward, saving you time and effort on your plumbing projects.