Oxygen-Barrier PEX Tubing 1/2 in x 500 ft - EVOH Radiant Heat

Our review of this Oxygen-Barrier PEX tubing finds it best suited for homeowners and contractors who need a long, reliable coil for radiant floor heating or potable water loops. The single biggest reason to buy is the built-in EVOH oxygen barrier combined with smooth PEX construction, which protects metal components and keeps flows consistent over long runs. The 500 ft red coil and 1/2 in nominal size make it a practical choice when a long uninterrupted length is needed for slab, staple-up, or snow melting installations.

Key Features

• Oxygen barrier: The EVOH layer prevents oxygen ingress to protect boilers and metal fittings, extending system life.
• Long continuous coil: At 500 ft total length, the single coil reduces joints and leak points for large loops and slab layouts.
• Reliable dimensions: The 0.625 in outside diameter and 0.475 in inner diameter provide predictable flow and compatibility with standard 1/2 in PEX fittings.
• Heat-ready rating: Wide temperature range and pressure ratings maintain performance from very cold to high operating temperatures.
• Flexible handling: A small minimum bending radius and good flexibility make routing around joists and through slabs easier on site.

Who It's For

This tubing is aimed at residential and light commercial installers who need a long run of 1/2 in PEX with oxygen protection for radiant floor heating, snow melting, or solar water heater circuits. It is also suitable for potable water applications where a red-coded coil is preferred.

Those who need specialized barrier chemistries beyond EVOH or who require thicker pipe walls or a different nominal size should look elsewhere; this coil is optimized for 1/2 in applications where length, flexibility and oxygen resistance are the priorities.

Pros & Cons

Pros

• Built-in EVOH oxygen barrier protects metal components and lengthens system service life.
• Large 500 ft coil reduces the number of joints and speeds installation on larger projects.
• Smooth inner surface resists scaling and promotes efficient heat transfer for energy savings.
• Compatible with common connection methods including crimp, cinch, press and compression fittings.

Cons

• Only offered in 1/2 in nominal diameter and red color, so projects needing other sizes require a different product.
• Pressure ratings vary with temperature, so installers must confirm limits for very high temperature systems.

Specifications

Type	Oxygen-Barrier PEX-B (EVOH layer)
Color	Red
Nominal diameter	1/2 in
Total length	500 ft
Outside diameter	0.625 in
Inner diameter	0.475 in
Tube thickness	0.07 in

Our Verdict

The 1/2 in x 500 ft oxygen-barrier PEX coil is a practical, cost-conscious choice for installers who need long continuous runs with oxygen protection. Its EVOH layer, predictable dimensions and installation compatibility make it a strong value for radiant floor heating and potable water loops where a single long coil reduces joints and labor.

Frequently Asked Questions

Is this tubing suitable for radiant floor heating?
Yes, the EVOH barrier, temperature range and flexibility make it well suited for radiant floor heating installations.

What connection systems work with this tubing?
It is compatible with crimp, cinch (clamp), press systems and compression PEX fittings when used with appropriate tools and rings or clamps.

What are the pressure limits?
Pressure capacity depends on temperature: higher pressures at lower temperatures and reduced ratings at elevated temperatures, so follow the specified limits for your application.