PEXGUY Radiant PEX Tubing is a barrier crosslinked polyethylene pipe produced using silane cross link method. Oxygen Barrier (EVOH) layer prevents air/oxygen to get into your radiant heating system thus making it ideal for both ferrous and non ferrous systems (closed or open type systems) These Oxygen Barrier PEX piping can be used for radiant heating systems for residential and commercial applications and is by far the most common tubing used for these applications. This PEX piping is NSF Certified and works great for putting any radiant heating system. This material is suitable for direct burial and poured concrete installations. Suitable for applications such as: Thick/Thin poured concrete slabs Underneath the sub-floor (between floor joist) with or without heat plates Engineered Floors / Modular Wood Engineered Floors Staple up and/or Staple down installations Baseboard or Radiator systems Snow Melting systems Solar Heating / Geothermal systems Water to Air Heat Exchanger systems Direct Burial Indoor/Outdoor Wood Boilers NOT Compatible with: Expander Fitting System, Uponor/Wirsbo Expander System Certifications & Standards PEX GUY piping is NSF certified, SDR 9 sizing standard, Manufactured to ASTM 876/877 standards, CSA 137.5 (Canadian Certification), Warnock Hersey Canada (Canadian Certification) DIN 4726 (European Standard) Residential & Commercial Applications Perfect for under-floor heating systems in residential, commercial and industrial settings. Oxygen Barrier, O2 Barrier, EVOH The EVOH barrier on the PEX keeps oxygen from infiltrating the system which prevents mechanical components in heating systems from corroding. Read more Compatible Fittings Styles Compression Fitting Systems Crimp Fitting Systems Cinch/Pinch and Clamp Fitting Systems Sharkbite Fitting Press-Fit Fitting Systems and other similar systems Fittings could be brass, copper, stainless steel or poly. Marked Every 5 Ft All PEX piping is marked every 5 Ft to know the exact lengths of each loop faster and easier. Certifications can also be found every 5 feet printed on the tubbing. Crimp & Cinch Fastening System To be used with a copper crimp tool and a stainless cinching tool. Read more