1" x 300' hePEX Barrier Tube Coil, Heat Transfer, White

Product Overview

The Uponor A1251000 HePEX Barrier Tubing is a 1-inch nominal size, 300-foot coil designed for hydronic heating and cooling systems. Manufactured from high-quality cross-linked polyethylene (PEX) with an oxygen barrier layer, this tubing is engineered for long-term performance in closed-loop systems. The tubing delivers consistent flexibility, pressure integrity, and thermal stability under demanding operating conditions, making it suitable for professional radiant, snow melt, and hydronic distribution applications.

Technical Specifications

• Manufacturer: Uponor, Inc.
• Model Number: A1251000
• Description: HePEX Barrier Tubing – 1-inch x 300-foot Coil
• Reference Number: 903185
• Nominal Size: 1 in (25 mm)
• Inside Diameter (ID): 0.862 in (21.9 mm)
• Outside Diameter (OD): 1.125 in (28.6 mm)
• Coil Length: 300 ft (91.4 m)
• Material: Cross-linked polyethylene (PEX-a) with oxygen diffusion barrier
• Color: White
• Working Pressure:
  • 80 psi @ 200°F (93°C)
  • 100 psi @ 180°F (82°C)
  • 160 psi @ 73.4°F (23°C)
• Temperature Range: 73.4°F to 200°F (23°C to 93°C)
• Oxygen Barrier: EVOH (ethylene vinyl alcohol) layer meeting ASTM F876 oxygen transmission requirements
• Applications:
  • Radiant floor heating systems
  • Hydronic baseboard or radiator systems
  • Snow and ice melting systems
  • Chilled water distribution loops
• Installation Compatibility:
  • Compatible with Uponor ProPEX fittings, manifolds, and accessories
  • Usable with mechanical, crimp, or expansion connection systems
• Performance Characteristics:
  • High flexibility for reduced fitting requirements
  • Low thermal expansion rate for stable installation performance
  • Corrosion- and scale-resistant inner wall
  • Oxygen barrier protects metallic components in closed-loop systems
• Standards and Compliance:
  • ASTM F876 / F877 – PEX Tubing Standards
  • ASTM F2023 – Chlorine Resistance
  • CSA B137.5 – PEX Pressure Pipe
  • NSF/ANSI 61 and 372 Certified
  • Oxygen diffusion barrier per DIN 4726
• Installation Guidelines: Install using Uponor-approved fittings and tools; protect tubing from direct UV exposure during storage and installation.
• Service Environment: Indoor and protected outdoor hydronic systems; not intended for potable water applications.
• Markings: Sequential footage markings and code compliance designations along tubing length

Summary

The Uponor A1251000 HePEX Barrier Tubing is a 1-inch, 300-foot PEX-a coil rated for 80 to 160 psi and 73.4°F to 200°F operating temperatures. Constructed with an EVOH oxygen barrier, it provides durable, flexible, and corrosion-resistant performance for professional radiant heating, cooling, and hydronic distribution systems.