SharkBite 5' Red PEX Stick Pipe. It is a cross linked polyethylene tubing used for potable water application. The SharkBite imprint pattern provides a visual aid to determine if the tube has been inserted all the way into the SharkBite push fit fitting. It is approved by 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. It has a 25-year limited warranty.