The Differences Between PEX-A, -B and -C | SharkBite
PEX A is made using the Peroxide, or Engel, method. PEX B is formed using Silane, or Moisture Cure, method. This is the most common PEX pipe type out there. PEX C is created using the Electronic Irradiation, or Cold, method of cross-linking. There may be small variations in density, burst pressure levels and bend radiuses between PEX pipe types ...