Abstract: The present invention provides a test tee device for leak testing a pipe line system. In structure, the tee test device comprising a tee fitting. The tee fitting comprises a tubular section with first and a second opposing openings, a third opening with the tubular section of the tee fitting, and a removable insert attached in the tubular section and blocking the flow through said first opening. The tubular section has an inside diameter greater than the inside diameter of the first and of the second opening, and the removable insert is larger than the inside diameter of said tubular section. The tubular section also contains a notched section to allow for movement of the pull tab portion of the removable insert. The present invention also provides for a test tee device wherein the removable insert comprises a threaded blockage device.