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 Single Pipe, 3 in Nominal, 2.398 in Inside Dia, 3-1/8 in Outside Dia, 300 ft Coil Length, 80 psi Working, 200 deg F, Cross Linked Polyethylene, Domestic