SharkBite U870O300 Oxygen Barrier PEX Pipe 3/4 Inch, Orange Heat Radi, 3/4-inch, 300 Feet PEX RADIANT TUBING: Flexible oxygen barrier pipe tubing for radiant floor and hydronic heating applications. Chlorine Resistant. Stress tested to 630 psi at 73 degrees F. FLEXIBLE PEX PIPE: Expands and contracts with temperature changes and is freeze resistant PUSH-TO-CONNECT: Use with SharkBite plumbing fittings or plastic barb and brass barb fittings using PEX crimp tool or clamp connections RESIDENTIAL and COMMERCIAL: All SharkBite PEX tubing meets the same standards for commercial and residential plumbing applications MADE IN THE USA: Manufactured and tested in the USA