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A residential Uponor radiant floor heating system installation image
Residential solutions

The best pipe for the job

Learn about Uponor’s two different PEX piping products for residential radiant floor heating systems. 

Uponor residential radiant floor heating system piping products 

Uponor offers two different piping types for residential radiant floor heating systems: Wirsbo hePEX™ and Uponor helioPEX™ X2. Both pipes are flexible, durable and feature an oxygen barrier to protect the ferrous components in a hydronic radiant system — a must for any radiant project. 
Uponor's radiant pipe offering

Wirsbo hePEX 

  • PEX-a manufacturing method for 80+% crosslinking
  • Pipe sizes from 5/16" to 4"
  • Approved for potable use
  • 30-year warranty

Uponor helioPEX X2

  • PEX-other manufacturing method for 75-80% crosslinking
  • Pipe sizes in ½", ⅝" and ¾"
  • Not approved for potable use
  • 25-year warranty

Uponor PEX piping vs. other radiant piping products

Uponor PEX piping products feature the highest degree of crosslinking for the greatest flexibility and durability. And unlike PEX-b, PEX-c and PE-RT pipe, Uponor pipe can be kink repaired with a simple shot of heat from a heat gun to eliminate unnecessary couplings in a system. Best of all, Uponor PEX pipe offers thermal memory, which enables the strongest connections for ASTM F1960 expansion fittings.


helioPEX X2




Crosslink percentage 80+% 75 to 80% 65 to 70% 70 to 75% 0%
Kink repairability
Thermal memory
Greatest freeze resistance
Maximum performance with any fitting type
(expansion, compression, crimp)
Workability High High Low Low Medium

Product catalog

Explore Uponor's wide range of  product offerings

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