What is the most commonly used PEX fitting?
Crimp style fittings are the most common and affordable type of PEX fittings and can be found in majority of supply houses, home improvement stores and online stores. Brass PEX crimp fittings are manufactured to ASTM F1807 standard. Poly alloy PEX crimp fittings are manufactured to ASTM F2159 standard.
What is the difference between PEX A and PEX B fittings?
Again, the main distinction lies in the manufacturing method, which is what assigns an A, B or C to PEX. 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.
Which PEX fittings are best?
PEX-A, which has the most flexible tubing and best freeze- and kink resistance, is ideal for use with kitchen and bath fixtures. PEX-B is slightly less flexible and less freeze-resistant.
