The Differences Between PEX-A, -B and -C
PEX (cross-linked polyethylene) plumbing pipes come in three different types: PEX-A, PEX-B, and PEX-C. Here are the main differences between these types:
Manufacturing process: The main difference between PEX-A, PEX-B, and PEX-C is the manufacturing process. PEX-A is made using the Engel method, which involves cross-linking the polyethylene under high pressure and high temperature. PEX-B and PEX-C are made using the Silane method, which involves cross-linking the polyethylene using a chemical reaction.
Flexibility: PEX-A is the most flexible of the three types, and it can be bent and shaped without the need for fittings or elbows. PEX-B and PEX-C are less flexible, and they may require fittings or elbows to make sharp turns.
Durability: PEX-A is the most durable of the three types, and it has a higher resistance to stress cracking and damage from freezing and thawing. PEX-B and PEX-C are less durable, and they may be more prone to cracking and damage.
Cost: PEX-A is the most expensive of the three types, while PEX-B and PEX-C are less expensive.
Fittings: PEX-A requires special fittings that are designed to expand and contract with the pipe, while PEX-B and PEX-C can use standard fittings.
In summary, PEX-A is the most flexible and durable type of PEX plumbing pipe, but it is also the most expensive. PEX-B and PEX-C are less flexible and less durable, but they are also less expensive. The choice between these types depends on the specific requirements of the project and the budget.