What is an Insert Fitting?
An insert fitting is Vanguard Pipe & Fittings Ltd.s designation for a family of specially designed insert fittings designed to join CTS, SDR-9 cross-linked polyethylene tubing (PEX) for hot and cold water plumbing systems. Currently, Insert fittings are available in brass, copper, and a blend of polyphenylsulfone specialty plastic resins.