Legend Valve 850-143 Legendflex Pex Tube with Oxygen Barrier 5/8 Inches 300 Foot Coil

Product Description

The Legend Valve 850-143 is a 5/8 inches LEGENDFlex PEX tubing with an integrated oxygen barrier, supplied in a 300-foot coil. This product is designed for hydronic heating systems, radiant floor heating, and closed-loop plumbing applications where oxygen intrusion must be prevented. Plumbers, pipefitters, and hydronic system installers rely on oxygen barrier PEX tubing to protect ferrous components such as boilers, pumps, manifolds, and cast iron fittings from corrosion caused by dissolved oxygen in the water. The oxygen barrier layer in the 850-143 is bonded directly to the exterior of the tube, meeting DIN 4726 standards for oxygen diffusion, which keeps system integrity intact over the long service life of the installation. LEGENDFlex PEX tubing is manufactured to ASTM F876 and ASTM F877 standards, confirming it meets the dimensional and performance requirements expected by professional installers. PEX tubing at the 5/8 inches diameter is a common choice for radiant heating loops, offering a balance between flow rate capacity and flexibility that makes routing through floors, walls, and tight spaces straightforward. The 300-foot coil format reduces the need for couplings and fittings on longer runs, which lowers both labor time and potential leak points. This tube handles working pressures up to 100 PSI at 180 degrees Fahrenheit, making it well suited for hot water hydronic circuits. Legend Valve is a recognized name in the plumbing and hydronic industry, known for producing reliable flow control and distribution products. The 850-143 fits standard PEX fittings and is compatible with crimp, clamp, and expansion connection methods depending on the fitting type used. Whether used in new construction or retrofit hydronic installations, this oxygen barrier PEX coil delivers the performance and convenience trade professionals expect on the job.

• Integrated oxygen barrier layer prevents dissolved oxygen from entering the system, protecting metal components from corrosion
• 5/8 inches diameter in a 300-foot coil reduces coupling count on long radiant or hydronic loop runs
• Rated for up to 100 PSI at 180 degrees Fahrenheit, suitable for residential and light commercial hydronic heating systems

Product Highlights

The Legend Valve 850-143 LEGENDFlex PEX tube with oxygen barrier delivers reliable corrosion protection and flexibility for radiant floor heating and hydronic systems. The 300-foot coil length and 5/8 inches diameter make it a practical choice for professional installers on mid to large scale loop installations.

Product Information

Standard Information

• Brand: LEGEND VALVE
• Manufacturer Part Number: 850-143

Technical Specifications

• Tube Diameter: 5/8 inches
• Coil Length: 300 feet
• Tube Type: PEX with Oxygen Barrier
• Application: Hydronic heating, radiant floor heating, closed-loop systems
• Oxygen Barrier Standard: DIN 4726
• Construction Standard: ASTM F876, ASTM F877
• Maximum Working Pressure: 100 PSI at 180 degrees Fahrenheit
• Compatible Connection Methods: Crimp, clamp, expansion