The Superseal Pipe Insert has been developed to be used with Speedfit Barrier Pipe and Speedfit fittings to provide an extra line of defence when installing a Speedfit Push Fit System. The insert has its own ?O?Ring which, together with a Stem sliding within the pipe ID, gives a secondary seal against the inside of the fitting. The Speedfit connection, when made with the Insert, has a number of design features. Sliding the stem of the insert into the pipe gives greater compression of the main ?O?Ring on the pipe and greater rigidity of the length of pipe within the fitting, reducing the chance of leaks if a side load is applied. A connection is easier to make because the head of the insert has been designed for ease of insertion.