
PEX A vs. PEX B Piping: What’s the Difference?
Today, PEX piping is commonly used by residential plumbers. However, it wasn’t commonplace in the U.S. Until the mid-1980s, after having been introduced in Europe in 1968. Cross-linked polyethylene, or PEX, is available in different types. For this article, we’ll focus on two of them, and discuss PEX A vs. PEX B, their benefits, and when one is preferred over another. Both forms are the same size, meeting Copper Tube Size standards. They also meet the ASTM F876 performance