Press-fit 54 mm XPress Gas Obtuse Street Elbow - Designed specifically for use on internal and external, above ground 2nd and 3rd family gas installation pipework. BSI Kitemark (BS 8537:2010) and GASTEC approved. Manufactured by a BS EN ISO 9001:2000 registered company. for identification fitting has yellow/tan NBR O-rings and "Gas" marked in a yellow block on the fitting body.  XPress fitting provides electrical continuity when pressed/installed with copper tube to BS EN 1057 R250/R290.
XPress fitting should not be painted or come into contact with cleaning products, paint, grease, flux, mineral oil, adhesive or other solvent based materials during installation, lagging or after installation.