everal types. For example, there is PEX A and PEX B piping. Each of them has distinct functions. Your plumber can inform you to explain more about each. What's important is that PEX cost less to purchase and is easier to set up than copper. PEX will last more than twice the time as copper. This makes it a perfect option if you require new piping. This can help save you lots of dollars. c5ccph8ord.