True or False: All PEX fittings conform to True Copper Tube Size (CTS) standards.

PEX (cross-linked polyethylene) plumbing systems have specific fittings that may not uniformly conform to True Copper Tube Size (CTS) standards. The CTS is a standard that specifies the nominal dimensions of copper tubing used in plumbing. While many manufacturers produce PEX fittings that do conform to CTS dimensions to ensure compatibility with copper and other plumbing systems, it is not a universal requirement for all PEX fittings. Some manufacturers might use different sizing conventions or standards, which could lead to variations in fitting dimensions. Therefore, stating that all PEX fittings conform to CTS standards is not accurate, making the statement false. Understanding this distinction is important for ensuring proper compatibility and installation in plumbing systems.