Difference between PEX A and PEX B
When it comes to plumbing systems, PEX tubing has emerged as a favorite among professionals because of its flexibility, durability, and cost-effectiveness. But, not all PEX tubing is created equal. There are two types of PEX tubing widely used in plumbing systems, namely PEX A and PEX B. While both have similar properties, there are some key differences that you need to know when choosing the right type of PEX tubing for your project. In this article, we will discuss the differences between PEX A and PEX B and their applications.
What is PEX A?
PEX A is a type of cross-linked polyethylene tubing that is manufactured using the Engel method. This method involves irradiating the polyethylene material under high pressure and temperature to create crosslinks between the molecules. This process results in a more uniform and stronger bond between the molecules, making PEX A more flexible and resistant to cracks and leaks at low temperatures.
Examples of PEX A
PEX A is typically found in residential and commercial plumbing systems such as hot and cold water supply lines, radiant floor heating systems, and hydronic heating systems. It is also used in the production of flexible hoses and tubing for medical and food industries.
Uses of PEX A
- Hot and cold water supply lines
- Radiant floor heating systems
- Hydronic heating systems
- Potable water systems
- Flexible hoses and tubing for medical and food industries
What is PEX B?
PEX B is a type of cross-linked polyethylene tubing that is manufactured using the Silane method. This method involves extruding the polyethylene material through a machine and then cross-linking it with a chemical compound called silane. This process results in a lower crosslink density compared to PEX A, making it less flexible but more affordable.
Examples of PEX B
PEX B is typically found in residential and commercial plumbing systems such as hot and cold water supply lines, radiant floor heating systems, and hydronic heating systems.
Uses of PEX B
- Hot and cold water supply lines
- Radiant floor heating systems
- Hydronic heating systems
- Potable water systems
Differences Table
Difference Area | PEX A | PEX B |
---|---|---|
Production Method | Manufactured using the Engel Method | Manufactured using the Silane Method |
Flexibility | More flexible | Less flexible |
Strength | Stronger bond between molecules | Weaker bond between molecules |
Resistance to cracking | High resistance to cracking at low temperatures | Lower resistance to cracking at low temperatures |
Cost | More expensive | Less expensive |
Installation Method | Expansion fittings and compression rings | Crimp fittings |
UV Resistance | More resistant to UV rays | Less resistant to UV rays |
Oxygen Barrier | Better oxygen barrier | Lower oxygen barrier |
Applications | Suited for residential and commercial plumbing, as well as medical and food industries | Suited for residential and commercial plumbing |
Temperature Range | Can handle high temperatures up to 200°F | Can handle high temperatures up to 180°F |
Conclusion
While both PEX A and PEX B have similar uses and applications, they differ in terms of flexibility, strength, cost, and installation method. PEX A is more expensive but has better resistance to cracking and UV rays, making it suitable for a wider range of applications, including medical and food industries. PEX B, on the other hand, is less expensive and is typically used for residential and commercial plumbing systems.
Knowledge Check
- What is the production method for PEX A?
- Which type of PEX tubing is more flexible?
- What is the installation method for PEX B?
- Which type of PEX tubing has better resistance to UV rays?
- At what temperature can PEX A handle?
- Which type of PEX tubing is less expensive?
- Which PEX tubing is typically used in the production of flexible hoses and tubing for medical and food industries?
- What chemical compound is used to crosslink PEX B?
- What is the difference in crosslink density between PEX A and PEX B?
- Which type of PEX tubing has a better oxygen barrier?
Manufactured using the Engel Method
PEX A
Crimp fittings
PEX A
Up to 200°F
PEX B
PEX A
Silane
PEX A has a higher crosslink density compared to PEX B
PEX A
Header tag 3 Related Topics
- Types of Fittings for PEX Tubing
- PEX vs Copper Piping: The Pros and Cons
- The Benefits of Using PEX Tubing in Plumbing Systems