Ecoflex thermal single pipes are designed for fluid transfer in heating and cooling applications. The Wirsbo hePEX service pipe in Ecoflex thermal single piping is manufactured by the Engel-method (PEX-a) process and is listed to ASTM F876 and F877. An oxygen-diffusion barrier extruded onto the service pipe dramatically reduces the amount of oxygen molecules that can migrate through the tubing wall. This oxygen-diffusion barrier protects ferrous components within the fluid pathway from corrosion. The pipe is surrounded by multi-layer, closed-cell, PEX-foam insulation and a water-resistant, corrugated HDPE jacket, making it ideal for direct-burial applications. Uponor Ecoflex® Thermal Pipe, Single, 2 in Nominal, 1.629 in Inside Dia, 2-1/4 in Outside Dia, 1.93 in Wall Thickness, 0.25 Btu-in/hr-sq-ft-deg F, 9.5, 73.4 to 200 deg F, Polyethylene