SharkBite 300' Red PEX Coil Pipe. It is a cross linked polyethylene tubing designed for potable water application. The SharkBite imprint pattern ensures proper insertion into SharkBite push fit fittings. It is approved by various standards, including ANSI/NSF 61, ANSI/NSF 14, CSA B137.5, ASTM F876, ASTM F877, ASTM F2023, ASTM F2657, ASTM E84 AWWA C904, UL 1821, and CAN/ULC S102.2. Backed by a 25-year limited warranty.