Alpha PEX-A Tubing with Oxygen Barrier by PEX GUY can be used for radiant heating systems for both residential and commercial applications. NSF Certified to ASTM Standard ensure that it meet or exceeds USA quality standards. Manufactured to SDR-9 Dimension standards; this can even be used with the F1960 expander-style (Uponor/Wirsbo) fittings as well as other popular PEX fitting systems (see list below). PEX-A is manufactured using the “Engel” method which results in the highest degree of crosslinking around 85 percent. Advantage of this method is the great flexibility, allowing the tightest bend radius to eliminate fittings and easier installation. PEX-A also offers a unique thermal and elastic memory which means kinks in the PEX can be repaired with the use of a heat gun. The higher degree of crosslinking of PEX-A also offers greater durability in freeze/thaw cycles, keeping the integrity of the pipe intact. This material is rated for direct burial and poured concrete installations. Suitable for applications such as: Thick/Thin poured concrete slabsUnderneath the sub-floor (between floor joist) with or without heat platesEngineered Floors / Modular Wood Engineered FloorsStaple up and/or Staple down installationsBaseboard or Radiator systemsSnow Melting systemsSolar Heating / Geothermal systemsWater to Air Heat Exchanger systemsDirect Burial Indoor/Outdoor Wood BoilersCompatible with: Uponor/Wirsbo Expander System, Crimp and Cinch Fittings systems, Push-Fit Fitting systems Certifications & Standards Alpha PEX-A piping is NSF certifiedSDR 9 sizing standardManufactured to ASTM 876/877 standardsCSA 137.5 (Canadian Certification), DIN 4726 (European Standard)Made in Europe Residential & Commercial Applications Perfect for under-floor heating systems in residential, commercial and industrial settings. Alpha Oxygen Barrier, O2 Barrier, EVOH The EVOH barrier on the PEX keeps oxygen from penetrating the system which prevents ferrous mechanical components in heating systems from corroding. Compatible Fittings Styles Expander Fitting Systems – F1960 (Uponor/Wirsbo)Compression Fitting SystemsCrimp Fitting SystemsCinch/Pinch and Clamp Fitting SystemsSharkbite FittingPress-Fit Fitting Systems and other similar systemsFittings could be brass, copper, stainless steel or poly. Marked Every 2 Ft All PEX piping is marked every 2 Ft to know the exact lengths of each loop faster and easier. Certifications can also be found every 2 feet printed on the tubing. Crimp & Cinch Fastening System To be used with a expander tool (Wirsbo/Uponor),copper crimp tool, or a stainless cinching tool.