PEX, also known as cross-linked polyethylene, has gained popularity in recent years as a flexible and easy-to-install alternative to traditional piping materials such as copper and PVC. However, there are certain situations where P-E-X should not be use. In this article, we will discuss where you should not use P-E-X and why.

Exposed outdoor applications :Where Should You Not Use P-E-X?

P-E-X should not use in any expose outdoor applications where it is exposed to UV radiation, as it can degrade the material and cause it to become brittle over time. If you need to use PE-X in an outdoor application, make sure to use a UV-resistant P-E-X material.

High-temperature applications

P-E-X is not recommend for use in high-temperature applications above 200 degrees Fahrenheit, as the material can deform and lose its shape. In these situations, it’s best to use copper piping.

Recirculating hot water systems:

P-E-X may not be suitable for use in recirculating hot water systems, as the constant flow of hot water can cause the material to break down over time. In these situations, it’s best to use copper or CPVC piping.

Closed-loop radiant heating systems:

PEX should not be use in closed-loop radiant heating systems that use oxygen barriers or aluminum plates, as the material can react with these substances and cause degradation over time. In these situations, it’s best to use PEX-AL-PEX piping, which is specifically design for use in these applications.

In conclusion, PEX is a versatile and cost-effective piping material that is suitable for many applications. However, it’s important to understand where PEX should not be use to avoid potential issues down the line. If you’re unsure whether PEX is suitable for your application, consult with a licensed plumber or building professional for advice.

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