PEX is a commonly used material for plumbing applications, including drinking water systems. There are three main types of PEX tubing: PEX-A, PEX-B, and PEX-C. Each type has its own advantages and considerations, and the "best" type may depend on specific needs and preferences. Here's a brief overview of each type:
1. PEX-A (Engel Method):
- Produced using the peroxide method (Engel method).
- Generally considered the most flexible type of PEX.
- Has the ability to expand and contract without breaking.
- Resistant to bursting in freezing conditions.
- May be more expensive than PEX-B and PEX-C.
2. PEX-B (Silane Method):
- Manufactured using the silane method.
- Typically has a slightly lower cost than PEX-A.
- May be less flexible than PEX-A, but still suitable for most applications.
- Resistant to bursting in freezing conditions.
3. PEX-C (Irradiation Method):
- Made using the irradiation method.
- Generally less flexible than PEX-A and PEX-B.
- May be more rigid and prone to kinking.
- Resistant to bursting in freezing conditions.
- Less common compared to PEX-A and PEX-B.
When it comes to drinking water applications, all three types of PEX are considered safe for use, as they are certified by various standards for drinking water safety. However, PEX-A is often favored for its flexibility and durability, which can be advantageous during installation. PEX-B is also widely used and may be preferred for its lower cost.
Regardless of the type, it's crucial to use PEX tubing that complies with local plumbing codes and standards. Additionally, consider factors such as the specific requirements of your plumbing system, installation preferences, and budget when choosing the type of PEX for your drinking water application. Always follow manufacturer recommendations and guidelines for installation and use.
