SharkBite PEX is cross-linked polyethylene tubing best suited for potable water supply applications and is strong, durable, flexible, and corrosion-resistant so that it may be used either indoors or buried directly outdoors. SharkBite PEX features a repeating SharkBite imprint pattern that provides a visual aid to help you determine whether the tube has been fully inserted when using the SharkBite push-fit fitting range.