Push In Fitting Converter For Plastic Tubing Two embodiments of a push in fitting converter are disclosed. Each includes a nut, a tube gripping member such as a collet or ring, an O-ring, and a sealing retainer. In one embodiment, the interior of the nut includes a threaded portion at one end, a cylindrical seal seat, and a smaller diameter end cylindrical portion, with an internal shoulder between the threaded portion and the seal seat. The gripping member operatively engages the interior of the nut. The O-ring forms the seal between the seal seat of the nut, and tubing inserted through it. The sealing retainer is engaged by the internal threads of the nut to hold the sealing retainer, O-ring,http://www.fakeoakleyslocal.us/, and gripping member in place within the nut. The sealing retainer engages both the internal shoulder of the nut and a fitting body on which the nut is to be threaded, thereby forming the seal between nut and fitting body. The nut is thereby effective to make sealed connection with a fitting body, and to make gripping and sealed connection with tubing inserted into the nut.In the second embodiment, the sealing retainer is threaded into the nut, and to the limits of the nut threads, to hold the sealing retainer, O-ring, and gripping member in place within the nut. The sealing retainer engages both the internal threads of the nut, and a fitting body on which the nut is to be threaded, thereby forming the seal between nut and fitting body. Again, the nut is effective to make sealed connection with a fitting body, and to make gripping and sealed connection with tubing inserted into the nut.At the present time, "push in" fittings are available only as complete units. If it is desired to convert an existing tubing system from conventional compression type fittings to push in type fittings,http://www.7th-gear.us/, the existing compression fittings are of novalue to the conversion, and must be entirely removed. By means of the present invention, an existing in-place compression fitting body (the part which is threaded into some body of hardware) can be kept in place as part of a conversion to a push infitting.Typical tubing lines for the transmission of fluids may include various sizes and shapes of pieces, generally identified as "fittings", to make connections between successive portions of tubing, or between tubing and other hardware. Suchfittings include male connectors, male elbows, male branch tees, male run tees, and others. The size range is quite extensive, as it relates both to outside diameters of mating tubing and to thread sizes.A conventional compression fitting includes a body, a nut, and a sleeve. The body usually has male or female pipe threads at one end, and straight male threads at the other end. The nut is threaded onto the straight male threads. The sleevefits between the nut and the body. An end of tubing is inserted through the nut and sleeve. Sleeve and tubing are compressed by the action of the nut and body, as they are threaded together, to form a tight sealed connection of fitting and tubing.In summary, the present invention is a push in fitting converter. It includes two embodiments, each including a nut, a tube gripping member such as a collet or ring, an O-ring, and a sealing retainer. In one embodiment, the interior ofthe nut includes a threaded portion at one end, a cylindrical seal seat, and a smaller diameter end cylindrical portion, with an internal shoulder between the threaded portion and the seal seat. The gripping member operatively engages the interior ofthe nut.