The standard barbed fitting is used for connecting 16mm LDPE pipe together. The Fittings are made in the EU using UV stabilised plastic. The sharp barbs make sure that the Joint is reliable and once fitted they are rated to 6 bar unlike normal domestic barbed fittings that are rated to pressures between 2.1 and 2.8 bar. The reason for this superior performance is the and number of barbs and their shape. Once fitted they are almost impossible to remove and if a mistake is made in many cases they have to be cut off. This is because of the size and sharpness of the barb and this can only be made with precise tooling and technical expertise found in European factories.