This photograph shows a typical example of the measures to which gas users sometimes have to resort. Regulators are, most often, supplied with a 3/8" BSP male, cone recessed outlet - this fitting doesn't easily lend itself to connecting up to gas applications which are supplied by 1/4" od tube, 8mm od tube, etc. Hence, we find users removing the factory fitted outlet, building-up unsound 'Christmas trees', subjecting themselves to the dangers of gas leakage and unplanned chemical reactions.