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PEX Evoh Pipe: Everything You Need to Know

Dec. 19, 2024

　　PEX EVOH pipes are a type of multilayer piping commonly used in plumbing, heating, and radiant floor systems. They combine the flexibility and durability of PEX (cross-linked polyethylene) with a layer of EVOH (ethylene vinyl alcohol copolymer) that acts as an oxygen barrier. Here's a breakdown of their characteristics:

　　Key Features:

　　PEX Core:

　　Flexible, lightweight, and easy to install.

　　Resistant to corrosion, scaling, and chemical damage.

　　Can handle high temperatures and pressures, making it suitable for hot and cold water systems.

　　EVOH Layer:

　　A thin oxygen barrier layer that prevents oxygen from penetrating the pipe walls.

　　Reduces the risk of oxygen-related corrosion in metal components of the system, such as boilers, radiators, and fittings.

　　Multilayer Structure:

　　Typically, the EVOH layer is sandwiched between layers of PEX or bonded to the exterior of the pipe.

　　Ensures the pipe remains robust while adding the oxygen barrier functionality.

　　Applications:

　　Radiant Heating Systems: The EVOH layer helps prevent oxygen from entering the system and causing rust in metal components.

　　Hot and Cold Water Plumbing: Suitable for both residential and commercial installations.

　　Hydronic Heating: Ideal for systems where water circulates through pipes for heating purposes.

　　Advantages:

　　Reduces maintenance costs by minimizing corrosion in the system.

　　Maintains the flexibility and ease of installation of standard PEX pipes.

　　Long service life and high resistance to wear and tear.

　　Installation Tips:

　　Avoid damaging the EVOH layer during installation, as this can compromise the oxygen barrier.

　　Use compatible fittings and tools designed for PEX EVOH pipes.

　　Ensure pipes are supported and secured to prevent kinking.

　　If you have specific questions about a particular brand or application of PEX EVOH pipes, let me know!

Why is PEX pipe so popular? How long will a PEX pipe last?

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