ASTM Large Dimension Wirsbo hePEX™ plus Tubing
Wirsbo hePEX™ plus tubing is crosslinked polyethylene (PEX-a) tubing sealed with a special polymer (EVOH) barrier that prevents corrosion of the ferrous components in a closed-loop heating system due to oxygen diffusion.
Historically, large dimension Wirsbo hePEX plus tubing shipped from Europe to North America and was only offered in metric sizes. However, Uponor now manufactures large dimension tubing in North America. To keep consistent with ASTM standard sizes used for all North American PEX tubing, Uponor now offers large dimension tubing in 1¼", 1½" and 2" sizes.
Manufacturing ASTM Large Dimension Wirsbo hePEX plus tubing in North America greatly reduces lead times, as well as allows customers to use the same large dimension ProPEX® fittings and tools used in plumbing applications.
ASTM Large Dimension Wirsbo hePEX plus tubing is compatible with engineered plastic (EP) and brass large dimension ProPEX fitting line offerings.

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Features and Benefits

Manufactured in the United States

Reduces lead times and increases product availability

Eliminates metric sizing conversion with North American measuring standards

Compatible with EP and brass large dimension ProPEX fitting line offerings

Provides easy installation
Installation Considerations
The size and flow characteristics of metric and ASTM large dimension Wirsbo hePEX plus tubing are different, so it is important to select the equivalent ASTM Large Dimension Wirsbo hePEX plus tubing size to properly meet the needs of an application. Refer to the table below to assist in selecting the proper size tubing for an application.
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