C
charliechaplinspants
its 22mm and the down pipe feeds a gas cooker only.... the vertical cap will feed the boiler in the loft.....
That looks ok to be honest, the pipe is accessible and on view, don`t think you will have any problems with that install. By now I`m sure any reputable gas fitter on this forum would have told you different, until that happens take the advice I have given.